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Distillation

Subclass of:

062 - Refrigeration

062600000 - CRYOGENIC TREATMENT OF GAS OR GAS MIXTURE

062617000 - Separation of gas mixture

062640000 - Air

Patent class list (only not empty are listed)

Deeper subclasses:

Class / Patent application numberDescriptionNumber of patent applications / Date published
062644000 Upstream operation 33
062648000 Downstream operation 18
Entries
DocumentTitleDate
20130042646Production of High-Pressure Gaseous Nitrogen - An improved process for producing elevated pressure nitrogen including providing an air separation unit with at least two columns, an LP column and an MP column. Also including extracting a nitrogen stream from the MP column and extracting a rich liquid from the bottom of the MP column, and providing at least a portion of the rich liquid stream to a first vaporizer. Also including introducing a portion of the nitrogen stream into the first vaporizer, thereby producing a boil-off gas, and warming at least a portion of the nitrogen stream in a heat exchanger, thereby producing a product nitrogen stream. Also including warming at least a portion of the boil-off gas in the heat exchanger, thereby producing warm intermediate stream, expanding the warm intermediate stream in an expander, thereby producing a quantity of work, and a low pressure intermediate stream, and introducing the low pressure intermediate stream into the LP column.02-21-2013
20110192193Method And Installation For Enriching A Gas Stream With One Of The Components Thereof - The invention relates to a method of enriching a pressurised gas stream (08-11-2011
20120174625METHOD AND DEVICE FOR PRODUCING A GASEOUS PRESSURIZED OXYGEN PRODUCT BY CRYOGENIC SEPARATION OF AIR - Process and apparatus for producing a pressurized gaseous oxygen product by cryogenic air separation07-12-2012
20080271481Air Separating Device by Means of Cryogenic Distillation - The invention relates to an air separating device by means of cryogenic distillation for producing nitrogen, comprising an exchange line (11-06-2008
20130133364APPARATUS AND PROCESS FOR SEPARATING AIR BY CRYOGENIC DISTILLATION - In a process for delivering pressurized gas from an apparatus for separating air by cryogenic distillation, a stream of oxygen-rich liquid or gas having a nominal flow rate is withdrawn from a low-pressure column, an oxygen-rich liquid purge stream is withdrawn as bottoms from the low-pressure column and the oxygen-rich liquid purge stream is sent to a storage tank, in the event of a reduction in the production by the column system or an increase in the demand by a customer, a back-up stream is withdrawn from the storage tank and vaporized in a back-up reboiler and only if the liquid level in the storage tank exceeds a given threshold, a liquid stream is withdrawn from the storage tank constituting at most 2% of the nominal production output of the oxygen-rich stream and is sent to the back-up reboiler.05-30-2013
20130086941AIR SEPARATION METHOD AND APPARATUS - A cryogenic air separation method and apparatus in which a lower pressure distillation column is configured to receive, at successively higher locations of the lower pressure column and at successively lower temperatures, crude oxygen derived from a crude liquid oxygen stream discharged from a higher pressure column, an intermediate reflux stream and a nitrogen-rich reflux stream. All of the streams are subcooled and depressurized. The subcooling is conducted such that the intermediate reflux stream and the nitrogen-rich liquid stream cocurrently, indirectly exchange heat to a nitrogen-rich vapor stream withdrawn from the lower pressure column and the intermediate reflux stream is subcooled to a temperature between the temperatures over which the nitrogen-rich liquid stream is subcooled. Additionally, the crude liquid oxygen stream and the intermediate reflux stream can, cocurrently, indirectly exchange heat to a pressurized liquid stream used in forming an oxygen product and the nitrogen-rich vapor stream.04-11-2013
20130086942DEVICE FOR THE CRYOGENIC SEPARATION OF AIR - The device serves for the cryogenic separation of air. It comprises a main heat exchanger (04-11-2013
20110011130Method And Apparatus For The Production Of Gas From Air In Highly Flexible Gaseous And Liquid Form By Cryogenic Distillation - A method of producing at least one air gas using cryogenic distillation is provided. The expanded streams coming from the two turbines are combined and then split into two fractions. The first fraction is sent to the medium-pressure column of the system in gaseous form, whereas the second fraction is returned to the cold end of the heat exchange line. At a temperature T01-20-2011
20120285197PROCESS AND UNIT FOR THE SEPARATION OF AIR BY CRYOGENIC DISTILLATION - An air separation unit having a medium-pressure column, a low-pressure column, a chamber, a heat exchanger, a bottom condenser of the low-pressure column and a condenser placed in the chamber is provided. The air separation unit also includes an expansion device configured to expand oxygen-rich liquid from the bottom of the low-pressure column before the oxygen-rich liquid is introduced to the chamber and a compressor configured to compress the gas from the chamber, wherein the compressor is downstream of the chamber and upstream of the low-pressure column.11-15-2012
20090007595Low Temperature Air Separation Process for Producing Pressurized Gaseous Product - A compressed air stream is cooled in an exchanger to form a compressed cooled air stream. The stream is then cryogenically compressed in a first compressor to form a first pressurized gas stream. The first pressurized gas stream is further cooled in the exchanger, cryogenically compressed in a second compressor, and then it is cooled and partially liquefied. The cooled and partially liquefied product is then fed to a system of distillation columns. A liquid product is removed from the system of distillation columns. This product is then pressurized, vaporized and warmed in the exchanger to yield pressurized gaseous product.01-08-2009
20090249830Process For Producing Variable Gaseous Nitrogen And Variable Gaseous Oxygen By Air Distillation - A process for producing variable gaseous nitrogen and variable gaseous oxygen by air distillation, during a period of high demand for gaseous nitrogen and for gaseous oxygen, liquid nitrogen is drawn off from a storage vessel, the liquid nitrogen is vaporized by heat exchange with a first flow of compressed, purified and cooled air, the vaporized nitrogen is sent to the customer and the first flow of liquefied air produced by the heat exchange is sent to a liquefied air storage vessel, liquid oxygen is drawn off from a storage vessel, the liquid oxygen is vaporized by heat exchange with a second flow of compressed, purified and cooled air, the vaporized oxygen is sent to the customer and the second flow of liquefied air is sent to the storage vessel.10-08-2009
20100115995AIR SEPARATION PROCESS USING CRYOGENIC DISTILLATION05-13-2010
20090277220METHOD AND APPARATUS FOR SEPARATING AIR - Method and apparatus of separating an oxygen and nitrogen containing feed stream, for example, air, in higher and lower pressure columns. A crude liquid oxygen stream condenses nitrogen vapor in the higher pressure column for reflux purposes and results in the partial vaporization of the crude liquid oxygen stream to produce vapor and liquid fractions thereof. The liquid fraction condenses a lower pressure part of the feed stream and results in the liquid fraction being at least partially vaporized. Both the vapor fraction of the crude liquid oxygen stream and the liquid fraction after having been at least partially vaporized are introduced into the lower pressure column. Boil-up is produced within a bottom region of the lower pressure column by partially vaporizing an oxygen-rich liquid column bottoms against condensing a higher pressure part of the feed stream and then utilizing vapor or residual liquid as an oxygen product.11-12-2009
20080289361Method and System for Treating an Oxygen-Rich Liquid Bath Collected at the Foot of a Cryogenic Distillation Column - Methods and apparatus for treating a liquid bath of oxygen. A liquid bath of at least 70 mol % of oxygen is located at the base of a cryogenic distillation column. The bath is continuously boiled by an aluminum reboiler. A portion of the liquid bath is purged to prevent a build up of inflammable impurities in the bath. A portion of the purge is sent to a second reboiler, which is less inflammable than the first reboiler. Oxygen boiled by the second reboiler is sent back to the column, and a portion of the oxygen rich liquid bath treated by the second reboiler is also purged. The invention also relates to an apparatus of carrying out this method.11-27-2008
20090120128Low Temperature Air Fractionation with External Fluid - In low-temperature air fractionation, feed air (05-14-2009
20080245102Process and Apparatus for the Separation of Air by Cryogenic Distillation - This disclosure discusses the problems associated with the design, layout, and construction of units and equipment in air separation units. The invention of this disclosure provides a process and apparatus using multiple discrete subcoolers. The nitrogen stream exiting the cryogenic distillation columns cools streams in the subcoolers. By having at least two subcoolers, the size of the nitrogen vent (nitrogen waste or product stream) can be reduced. This saves fabrication costs and improves reliability by reducing thermal stresses in the piping and equipment. Subcoolers cool rich liquid, lean liquid, liquid oxygen, and/or liquid air streams coming from the main heat exchanger or a system of separation columns. The disclosure also discusses integration of the subcoolers with the main heat exchangers.10-09-2008
20100139318Method And Device For Separating Air By Cryogenic Distillation - A method and an apparatus for distilling air by cryogenic distillation is presented. The invention relates to an apparatus using a double air separation column comprising a medium pressure column and a low pressure column connected thermally together by a reboiler-condenser.06-10-2010
20120067082METHOD AND APPARATUS FOR PRODUCING AT LEAST ONE ARGON-ENRICHED FLUID AND AT LEAST ONE OXYGEN-ENRICHED FLUID FROM A RESIDUAL FLUID - The invention relates to a method for producing an argon-enriched fluid and an oxygen-enriched fluid from a fluid resulting from a method for purifying of oxy-fuel combustion fumes, wherein said method comprises purifying the residual gas by a purification method in order to produce a gas enriched with carbon dioxide and a residual gas lean in carbon dioxide, pre-treating the residual gas lean in carbon dioxide in order to obtain a flow enriched with carbon dioxide and a flow lean in carbon dioxide, treating the flow lean in carbon dioxide by a cryogenic technique so as to extract at least an argon-enriched fraction, an oxygen-enriched fraction, and a fraction lean in argon and/or oxygen.03-22-2012
20090049864Liquid Collector and Redistributor For Packed Columns - An apparatus for collecting/redistributing a flow of liquid descending in an exchange column containing a layer of packing that includes: a plurality of horizontally spaced longitudinal members, each member having an inner side and an upper end adjacent a bottom of the layer of packing; at least one plate vertically spaced from the bottom of the layer of packing, each plate adapted to collect a portion of the flow of the descending liquid and having opposing ends connected to the inner sides of a pair of the longitudinal members; and at least one vapor riser in fluid communication with the plate and adapted to receive and transmit at least a portion of a stream of a vapor ascending in the exchange column from below to above the plate, each vapor riser having a cap vertically spaced apart from the bottom of the layer of packing.02-26-2009
20100162756Cryogenic Distillation Comprising Vacuum Insulation Panel - A cryogenic installation unit comprises at least one item of equipment (07-01-2010
20120240621DEVICE FOR THE LOW-TEMPERATURE SEPARATION OF AIR - The invention relates to an apparatus for the low-temperature separation of air and comprises a main heat exchanger (09-27-2012
20090107176Integrated Process and Gas Treatment Process - Integrated air separation units with a petrochemical process. This invention provides an integrated process and gas treatment process wherein at least one first pressurized gas derived from a first process at a first site is expanded. Using the work generated by the expansion of at least one pressurized gas, a first gas compressor at the first site is driven, operates, and removes compressed gas from the first gas compressor. At least part of the compressed gas from the first gas compressor is sent to a gas treatment unit located at a remote second site. At least part of the compressed gas sent from the first site to the second site is treated in the gas treatment unit. At least one fluid from the gas treatment unit is removed and at least part of the fluid removed from the gas treatment unit is sent to the first site.04-30-2009
20100313599Fin For Heat Exchanger And Heat Exchange Equipped With Such Fins - The invention concerns a fin defining a general corrugated direction (D12-16-2010
20090084133CONDENSER REBOILER SYSTEM - A condenser reboiler system located within a bottom region of a low pressure column of a double column arrangement that is used in an air separation system to separate air. The condenser reboiler system incorporates first and second heat exchangers of the down-flow type that are situated in a side-by-side relationship and with the first heat exchanger being shorter than the second heat exchanger so that the first heat exchanger will remain functional after a shut-down of the air separation system when the second heat exchanger(s) are not capable of operating due to liquid dumping into a sump region of the low pressure column. The side-by-side relationship allows the column to be fabricated without excessive height.04-02-2009
20100037656KRYPTON AND XENON RECOVERY METHOD - A method of separating air in which a superheated air stream is introduced into a mass transfer contacting zone associated with a higher pressure column of an air separation unit. Krypton and xenon is washed from a superheated air stream introduced into the mass transfer contacting zone, thereby to form a krypton and xenon-rich liquid. The krypton and xenon-rich liquid is stripped within a stripping column to produce a krypton-xenon-rich bottoms liquid. A krypton-xenon-rich stream composed of the krypton-xenon-rich bottoms liquid from the stripping column is produced for purposes of further refinement.02-18-2010
20100058805AIR SEPARATION REFRIGERATION SUPPLY METHOD - A method of supplying refrigeration to air separation plants within an air separation plant facility in which a refrigerant stream is produced at cryogenic temperature within a centralized refrigeration system. Streams of the refrigerant at the cryogenic temperature are introduced into the air separation plants such that all or a part of the refrigeration requirements of the air separation plants are supplied by the streams of the refrigerant.03-11-2010
20120240620METHOD AND DEVICE FOR GENERATING AN OXYGEN PRODUCT BY LOW-TEMPERATURE SEPARATION OF AIR - The method and device serve for generating an oxygen product by low-temperature separation of air having a distillation column system for nitrogen-oxygen separation that comprises a high-pressure column (09-27-2012
20110048068DEVICE FOR DRYING A GAS, IN PARTICULAR AIR, APPLICATION THEREOF TO A DEVICE, AND METHOD FOR COLLECTING A GAS SAMPLE - The invention relates to a device for drying a gas, in particular air, that comprises at least one chamber (03-03-2011
20110041552Apparatus And Method For Separating Air By Cryogenic Distillation - An apparatus and to a method for producing krypton and xenon by separating air by cryogenic distillation and in particular to a method for separating gasses from air using internal compression (in which the gaseous oxygen is produced by vaporization under pressure in the exchange line) where a krypton/xenon mixture is extracted is provided.02-24-2011
20110100055Hybrid Air Separation Method with Noncryogenic Preliminary Enrichment and Cryogenic Purification Based on a Single Component Gas or Liquid Generator - Large quantities of high purity and high pressure nitrogen or oxygen gas are produced using a portable system. A PSA, VSA, TSA, or permeable membrane system cleans the air of water and carbon dioxide, as normally required by the cryogenic distillation cycle, but additionally, a significant amount of the oxygen or nitrogen is also removed, depending on the desired produced gas. The removal of the oxygen or nitrogen before the cryogenic process permits the distillation column to be significantly shorter than would otherwise be required. This in turn reduces the size of the equipment such that it can easily be transported and setup. Additionally, a high pressure liquid pump is used to boost the pressure of the nitrogen or oxygen immediately before it goes through the last pass of the cryogenic heat exchanger where the liquid is vaporized and the incoming gas is cooled.05-05-2011
20110132035Method And Apparatus For Providing Nitrogen - A method and apparatus for providing nitrogen is provided.06-09-2011
20110259046Process And Apparatus For The Separation Of Air By Cryogenic Distillation - A process for producing a gaseous component of air under pressure by cryogenic separation is provided.10-27-2011
20100024478PROCESS AND DEVICE FOR RECOVERING ARGON BY LOW-TEMPERATURE SEPARATION OF AIR - The process and the device are used for recovering argon by low-temperature separation of air. Process air (02-04-2010
20120144861Process And Installation For Producing High-Pressure Nitrogen - A method and apparatus for producing high pressure nitrogen is provided. This system includes a first compressor for compressing air and cooling air to substantially the dew-point, a high pressure column, a medium pressure column, a conduit for introducing at least a portion of the compressed air at a base of the high pressure column; a conduit for removing a oxygen enriched liquid from the base of the high pressure column; a first valve for reducing the pressure of the oxygen enriched liquid to a medium pressure, where the medium pressure is between the high pressure and atmospheric pressure, a conduit for introducing the oxygen enriched liquid at an intermediate place of the medium pressure column; a second expander for reducing the pressure of at least a part of the liquid removed from the base of the medium pressure distillation column, to a low pressure to cool a top condenser of the medium pressure column and to form a waste vapor stream; a cold compressor for compressing a vapor stream removed form the medium pressure column, cooling the compressed vapor stream, and introducing it into the base of the high pressure column; a heat exchanger for heating the waste vapor stream, a first expander for expanding the heated stream to produce power; a conduit for withdrawing liquid from the top of the medium pressure column, pump for pumping the withdrawn liquid to high pressure and injecting it at the top of the high pressure column; and conduit for withdrawing product nitrogen from the top of the high pressure column.06-14-2012
20120036891AIR SEPARATION METHOD AND APPARATUS - An air separation method and apparatus in which a supercritical oxygen product is produced by heating a pumped liquid oxygen stream having a supercritical pressure, through indirect heat exchange with a boosted pressure air stream. The indirect heat exchange is conducted within a heat exchanger and a liquid nitrogen stream is vaporized in the heat exchanger to depress the pressure that would otherwise be required of the boosted pressure air stream to heat the pumped liquid oxygen stream. The pumped liquid oxygen stream constitutes 90 percent of the oxygen-rich liquid removed from an air separation unit in which the air is rectified, the liquid nitrogen constitutes at least 90 percent of the liquid nitrogen that is not used as reflux and a flow-rate ratio between the liquid nitrogen stream and the oxygen-rich liquid is between about 0.3 and 0.90.02-16-2012
20120036892AIR SEPARATION METHOD AND APPARATUS - An air separation method and apparatus in which a supercritical oxygen product is produced by heating a pumped liquid oxygen stream having a supercritical pressure, through indirect heat exchange with a boosted pressure air stream. The indirect heat exchange is conducted within a heat exchanger and a liquid nitrogen stream is vaporized in the heat exchanger to depress the pressure that would otherwise be required of the boosted pressure air stream to heat the pumped liquid oxygen stream. The pumped liquid oxygen stream constitutes 90 percent of the oxygen-rich liquid removed from an air separation unit in which the air is rectified, the liquid nitrogen constitutes at least 90 percent of the liquid nitrogen that is not used as reflux and a flow-rate ratio between the liquid nitrogen stream and the oxygen-rich liquid is between about 0.3 and 0.90.02-16-2012
20090078000METHOD AND APPARATUS FOR SEPARATING AIR - Method and apparatus of separating a nitrogen from a compressed and purified feed stream in a cryogenic rectification plant that employs a distillation column to produce a nitrogen-rich vapor as a column overhead and an oxygen-rich liquid column bottoms. Reflux is generated for the column by condensing part of the nitrogen-rich vapor within a down-flow heat exchanger. A stream of the oxygen-rich liquid column bottoms is introduced into an ejector which draws a stream of an oxygen-rich liquid phase produced from the outlet of a down-flow heat exchanger. The combined oxygen-rich liquid exiting the ejector is fed to the down-flow heat exchanger to condense the nitrogen-rich vapor. In such manner, part of the oxygen-rich liquid phase is recirculated to prevent dry-out of the down-flow heat exchanger outlet and to maintain effective condensation of the nitrogen-rich vapor.03-26-2009
20090100864PROCESS TO COMPRESS AIR AND ITS USE IN AN AIR SEPARATION PROCESS AND SYSTEMS USING SAID PROCESSES - The invention is directed to a process and a system to compress air. The process involves the following steps, 04-23-2009
20120118013APPARATUS AND METHOD FOR SEPARATING AIR BY CRYOGENIC DISTILLATION - The invention relates to equipment for separating air that includes a first average pressure distillation column, a second low-pressure distillation column, a third low-pressure distillation column, a first condenser-vaporizer, a second condenser-vaporizer arranged in the tank of the second column, a pipe for supplying air to the first column, a pipe for supplying a nitrogen-enriched liquid from the head of the first column to the head of the third column, at least one pipe for supplying the liquid from the tank of the third column to the first condenser-vaporizer, a pipe for supplying a liquid of the tank from the first column to the third column, a pipe for supplying the liquid from the first condenser-vaporizer to the second column, a pipe for supplying gas from the head of the second column to the tank of the third column, wherein the first, second, and third columns are arranged side by side.05-17-2012
20120131952METHOD FOR RECOVERING A GASEOUS PRESSURE PRODUCT BY LOW-TEMPERATURE SEPARATION OF AIR - The invention relates to production of a pressurized gaseous oxygen product by low-temperature separation of air in a distillation column system, having a low-pressure column and a high-pressure column. A first partial stream of the purified feed air is work-expanded in a first expander, and at least partially introduced into the high-pressure column. A second partial stream is cooled in a main heat exchanger to an intermediate temperature, further compressed, cooled in the main heat exchanger where it is liquefied or pseudo-liquefied, and then introduced into the distillation column system. A third partial stream of the compressed feed air is work-expanded in a second expander. A liquid oxygen product stream, removed from the distillation column system, is brought to an elevated pressure, evaporated or pseudo-evaporated in the main heat exchanger, heated to approximately ambient temperature, and ultimately withdrawn as a pressurized gaseous oxygen product stream.05-31-2012
20120125044FEED COMPRESSION METHOD AND APPARATUS FOR AIR SEPARATION PROCESS - A method and apparatus for separating air to produce a gaseous oxygen product in which the air is separated in an air separation plant to conduct a cryogenic rectification process that utilizes higher and lower pressure compressed air streams. The higher and lower pressure compressed air streams are generated in two multistage compressors linked together so that the lower pressure compressed air stream is produced from intermediate stages and the higher pressure compressed air stream is produced from higher pressure compression stages. During turn-down operational conditions, one of the two multistage compressors can be shut down to decrease the flow of air and therefore, the production of the oxygen product.05-24-2012
20100206004Main Exchange Line And Cryogenic Distillation Air Separation Unit Incorporating Such An Exchange Line - A unit for separating air using cryogenic distillation is provided.08-19-2010
20120297823METHOD AND APPLIANCE FOR SEPARATING AIR BY CRYOGENIC DISTILLATION - In a method for separating air in a column system, by cryogenic distillation, compressed, purified and cooled air is separated in the column system in order to form an oxygen-enriched flow and a nitrogen-enriched flow. At least one column of the column system contains a vaporizer-condenser for ensuring the vaporization of a liquid enriched in oxygen in relation to the air by means of heat exchange with a calorigenic fluid, the calorigenic fluid having been compressed upstream of the vaporizer-condenser in a compressor having a cryogenic inlet temperature, the calorigenic fluid being at least partially condensed in the vaporizer-condenser, and a cryogenic liquid is added to the calorigenic fluid upstream of the vaporizer-condenser.11-29-2012
20110226015AIR SEPARATION METHOD AND APPARATUS - A cryogenic air separation method and apparatus in which first and second liquid streams are produced. The first liquid stream has a higher oxygen content than air and can consist of a higher pressure distillation column bottoms and the second liquid stream, for instance, air, has a lower oxygen content than the first liquid stream and an argon content no less than the air. The second liquid stream is subcooled through indirect heat exchange with the first liquid stream and both of such streams are introduced into the lower pressure column. The second liquid stream is introduced into the lower pressure column above that point at which the crude liquid oxygen column bottoms or any portion thereof is introduced into the lower pressure column to increase a liquid to vapor ratio below the introduction of the second liquid stream and therefore, reduce the oxygen present within the column overhead.09-22-2011
20120324944METHOD AND INTEGRATED DEVICE FOR SEPARATING AIR AND HEATING AN AIR GAS ORIGINATING FROM AN AIR SEPARATION DEVICE - The invention relates to an integrated device for separating air and heating a gas in the air resulting from said air separation, comprising: an air separation device (12-27-2012
20130019634AIR SEPARATION METHOD AND APPARATUS - A method and apparatus for separating air in which the recovery rate of an oxygen product is increased by increasing the liquid to vapor ratio in a lower pressure column connected to a higher pressure column in a heat transfer relationship. A crude liquid oxygen column bottoms stream produced in the higher pressure column is partially vaporized against condensing argon-enriched vapor of the lower pressure column which is fed back to an argon stripping section of the lower pressure column. A supplemental nitrogen-rich reflux stream and an oxygen-enriched stream having a greater oxygen content than the crude liquid oxygen stream are fed into the lower pressure column. These streams are formed from a two phase stream produced, at least in part, from the crude liquid oxygen stream after the partial vaporization thereof.01-24-2013
20130167584HEAT EXCHANGER PERFORATED FINS - A plate fin heat exchanger comprises a folded fin sheet comprising fins wherein the fin sheet comprises a plurality of perforations, such plurality of perforations are positioned on the fin sheet in parallel rows when such fin sheet is in an unfolded state, such parallel rows of perforations on the fin sheet comprise a first spacing between the parallel rows of perforations (S07-04-2013
20110259047Method And Apparatus For Producing Nitrogen By Cryogenic Distillation Of Air - In a method for producing nitrogen by cryogenic distillation, air containing carbon monoxide is sent to a cryogenic distillation column (10-27-2011
20130111950COOLING UNIT, AND APPARATUS FOR SEPARATING AIR BY MEANS OF CRYOGENIC DISTILLATION INCLUDING SUCH COOLING UNIT - The invention relates to a cooling unit consisting of an exchange line capable of heating nitrogen originating from the system of columns by exchanging heat with the air to be cooled for the system of columns, and a cooling tower for the heat- and mass-exchange between the water to be cooled sent to the top of the tower and the nitrogen originating from a system of air distillation columns, the lower portion of the tower including an inlet connected to a nitrogen pipe, and the nitrogen pipe being connected to at least one exchanger body of the exchange line, which is capable of heating the nitrogen originating from the system of columns by exchanging heat with the air to be cooled for the system of columns, wherein the tower is arranged above at least one portion of the exchange line.05-09-2013
20130098106APPARATUS AND PROCESS FOR SEPARATING AIR BY CRYOGENIC DISTILLATION - In a process for separating air by cryogenic distillation, an oxygen-rich stream having a first oxygen purity of less than 98 mol % oxygen is withdrawn from the column system and sent to a customer, an oxygen-rich liquid stream having a second oxygen purity, possibly lower than 98 mol % oxygen, is sent to a storage tank, liquid is periodically withdrawn from the storage tank and sent to a back-up reboiler, to produce a back-up product, and a liquid stream having a third oxygen purity, lower than the first purity, is withdrawn from the bottom of at least one column of the column system and/or from the auxiliary reboiler and sent to the storage tank as a purge stream during a stoppage in the operation of the column system.04-25-2013
20130139546AIR SEPARATION METHOD AND APPARATUS - A method and apparatus to produce oxygen and nitrogen co-products in which a compressed a compressed and purified air stream is cooled, fully or partially condensed and then rectified in a main distillation column to form a nitrogen-rich vapor column overhead and crude liquid oxygen. A crude liquid oxygen stream is depressurized and then stripped in an auxiliary distillation column with a stripping gas to produce an oxygen-rich liquid. The nitrogen-rich vapor column overhead from the main distillation column is used to form a nitrogen product and the crude liquid oxygen is partially vaporized to produce the stripping gas, a residual oxygen-rich liquid and liquid nitrogen reflux to the main distillation column. The oxygen product is formed from the residual oxygen-rich liquid by either providing the heat exchange duty in condensing the compressed and purified air stream or by condensing nitrogen-rich vapor used in refluxing the main distillation column.06-06-2013
20130139547AIR SEPARATION METHOD AND APPARATUS - A method and apparatus to produce oxygen and nitrogen co-products in which a compressed a compressed and purified air stream is cooled, fully or partially condensed and then rectified in a main distillation column to form a nitrogen-rich vapor column overhead and crude liquid oxygen. A crude liquid oxygen stream is depressurized and then stripped in an auxiliary distillation column with a stripping gas to produce an oxygen-rich liquid. The nitrogen-rich vapor column overhead from the main distillation column is used to form a nitrogen product and the crude liquid oxygen is partially vaporized to produce the stripping gas, a residual oxygen-rich liquid and liquid nitrogen reflux to the main distillation column. The oxygen product is formed from the residual oxygen-rich liquid by either providing the heat exchange duty in condensing the compressed and purified air stream or by condensing nitrogen-rich vapor used in refluxing the main distillation column.06-06-2013
20130152629"Air cooling and purification apparatus intended for a cryogenic air distillation unit" - An apparatus for cooling and purifying a stream of air comprises a building, a cooling tower, for cooling by direct contact with water, two purification bottles, each of vertical axis, a pipe for sending water to the cooling tower, a pipe for sending air to the cooling tower, a pipe for sending cooled air from the tower to the purification bottles and a system of valves and piping for connecting the two bottles to the cooling tower, this assembly being located inside the building, and the two bottles and the tower being outside the building, the two bottles and the assembly being placed on either side of a wall of the building, the bottles being placed along the wall and the tower being positioned between the two bottles.06-20-2013

Patent applications in class Distillation

Patent applications in all subclasses Distillation