| Patent application number | Description | Published |
|---|
| 20080207973 | Purge Gas Streams to Stagnant Zones within Oxygenate-to-Olefin Reactor - The present invention comprises a process for conversion of oxygenates to olefins comprising contacting within a reactor the oxygenates with a catalyst to produce light olefins and wherein the reactor comprises at least two zones, a first zone wherein gas circulates at a faster rate than a second zone wherein a gas circulates at a slower rate; and inserting a quantity of inert gas into the second zone to increase circulation of any materials located in said second zone. The invention prevents accumulation of undesirable by-products within stagnant zones within the reactor and reduces the amount of coke deposited on catalyst or on surfaces within these zones. | 08-28-2008 |
| 20080242910 | Conversion of Dimethylether to Propylene using Moving Bed Technology - The average cycle propylene selectivity of an oxygenate to propylene (OTP) process using one or more fixed beds of a dual-function oxygenate conversion catalyst is substantially enhanced by the use of moving bed reactor technology in the hydrocarbon synthesis portion of the OTP flow scheme in lieu of fixed bed technology coupled with the selection of a catalyst on-stream cycle time of 200 hours or less. Those provisions hold the build-up of coke deposits on the catalyst to a level which does not substantially degrade dual-function catalyst activity, oxygenate conversion and propylene selectivity, thereby enabling maintenance of propylene average cycle yield at essentially start-of-cycle levels. The propylene average cycle yield improvement enabled by the present invention over that achieved by the fixed bed system of the prior art using the same or a similar catalyst system is of the order of about 1.5 to 5.5 wt-% or more. | 10-02-2008 |
| 20090030252 | Integration of Olefin Cracking with Metathesis to Increase Light Olefins Production - A process for increasing the propylene yields for hydrocarbon cracking processes. The process includes adding using alkylation of the C4s coming from the hydrocarbon cracker, and passing larger olefins to an olefin cracking unit. | 01-29-2009 |
| 20090205945 | Process and apparatus for alkylation of benzene with aliphatic mono-olefin compound - Processes and apparatus for the alkylation of benzene with mono-olefin aliphatic compound in at least two reaction zones in the presence of solid alkylation catalyst use a crude distillation of the reaction effluent passing between reaction zones to remove a substantial portion of the alkylbenzene. The processes reduce the amount of heavies generated in an economically attractive manner. | 08-20-2009 |
| 20090238729 | Conically Shaped Screenless Internals for Radial Flow Reactors - An apparatus for contacting a bed of particulate material with a cross flowing fluid, which maintains the bed of particulate material within a retention volume. The apparatus includes partitions for retaining particles, with apertures disposed within the partitions. The apertures are covered by shrouds that extend above the edges of the apertures to prevent solid particles from spilling through inlet apertures. | 09-24-2009 |
| 20090287030 | Oxygenate Conversion to Olefins with Dimerization and Metathesis - A processing scheme and system for enhanced light olefin production, particularly for increased relative yield of propylene, involves oxygenate conversion to olefins and subsequent oxygenate conversion effluent stream treatment including dimerization of ethylene to butene and metathesis of butenes and/or hexenes with ethylene. The processing scheme and system may further involve isomerization of at least a portion of 1-butene to 2-butene to produce additional propylene. | 11-19-2009 |
| 20090292150 | Integrated Processes for Making Detergent Range Alkylbenzenes from C5-C6-Containing Feeds - Integrated processes for making detergent range alkylbenzenes from C | 11-26-2009 |
| 20090292151 | Oxygenate Conversion to Olefins With Metathesis - A processing scheme and system for enhanced light olefin production, particularly for increased relative yield of propylene, involves oxygenate conversion to olefins and subsequent oxygenate conversion effluent stream treatment including cross-metathesis of 1-butene with 2-butene, metathesis of 2-butene with ethylene, conversion or removal of at least a portion of the isobutene, and/or isomerization of at least a portion of 1-butene to 2-butene to produce additional propylene. The processing scheme and system may further involve a reaction with distillation column for the metathesis of butenes with ethylene to produce propylene and/or a reaction with distillation column for the conversion of isobutenes with an oxygenate-containing material to produce a tertiary ether or alcohol. | 11-26-2009 |
| 20090321318 | Hydrocarbon Dehydrogenation with Zirconia - A method for obtaining an olefin is disclosed, the method comprising subjecting a paraffin to dehydrogenation in the absence of oxygen and in the presence of a catalyst comprising a crystalline substrate, to obtain an olefin. The catalyst includes an inert stabilizing agent for maintaining the catalyst crystal structure. The catalyst may be regenerated by being subjected, in air, to a temperature between about 550° C. and about 750° C., for a period of time between about 15 minutes and about 4 hours. | 12-31-2009 |
| 20090325784 | Hydrocarbon Dehydrogenation with Zirconia - A method for obtaining an olefin is disclosed, the method comprising subjecting a paraffin to dehydrogenation in the absence of oxygen and in the presence of a catalyst comprising a crystalline substrate, to obtain an olefin. The catalyst includes an inert stabilizing agent for maintaining the catalyst crystal structure. The catalyst may be regenerated by being subjected, in air, to a temperature between about 550° C. and about 750° C, for a period of time between about 15 minutes and about 4 hours. | 12-31-2009 |
| 20090325791 | Hydrocarbon Dehydrogenation with Zirconia - A method for obtaining an olefin is disclosed, the method comprising subjecting a paraffin to dehydrogenation in the absence of oxygen and in the presence of a catalyst comprising a crystalline substrate, to obtain an olefin. The catalyst includes an inert stabilizing agent for maintaining the catalyst crystal structure. The catalyst may be regenerated by being subjected, in air, to a temperature between about 550° C. and about 750° C., for a period of time between about 15 minutes and about 4 hours. | 12-31-2009 |
| 20100004496 | Integrated Processes for Making Detergent Range Alkylbenzenes from C5-C6-Containing Feeds - Integrated processes for making detergent range alkylbenzenes from C | 01-07-2010 |
| 20100004497 | Integrated Processes for Making Detergent Range Alkylbenzenes from C5-C6-Containing Feeds - Integrated processes for making detergent range alkylbenzenes from C | 01-07-2010 |
| 20100021357 | Integrated Oxygenate Conversion and Product Cracking - Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor. | 01-28-2010 |
| 20100048965 | Integrated Oxygenate Conversion and Product Cracking - Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor. | 02-25-2010 |
| 20100055008 | SCREENLESS INTERNALS FOR RADIAL FLOW REACTORS - An apparatus for contacting a bed of particulate material with a cross flowing fluid, which maintains the bed of particulate material within a retention volume. The apparatus includes partitions for retaining particles, with apertures disposed within the partitions. The apertures are covered by louvers that extend above the edges of the apertures to prevent solid particles from spilling through inlet apertures. | 03-04-2010 |
| 20100087693 | Integrated Oxygenate Conversion and Product Cracking - Improved processing of an oxygenate-containing feedstock for increased production or yield of light olefins. Such processing involves oxygenate conversion to olefins and subsequent cracking of heavier olefins wherein at least a portion of the products from each of the reactors is elevated in pressure, using a common compressor, prior to being routed to a common product fractionation and recovery section. In one particular embodiment, the cracked product gas can be treated to remove acid gas therefrom. In another embodiment, the olefin cracking reactor is a moving bed reactor. | 04-08-2010 |
| 20100152026 | Layered Sphere Catalysts with High Accessibility Indexes - A process and catalyst for use in the selective hydrogenation of acetylene to ethylene is presented. The catalyst comprises a layered structure, wherein the catalyst has an inner core and an outer layer of active material. The catalyst further includes a metal deposited on the outer layer, and the catalyst is formed such that the catalyst has an accessibility index between 3 and 500. | 06-17-2010 |
| 20100152507 | Process for Using Layered Sphere Catalysts with High Accessibility Indexes - A process and catalyst for use in the selective hydrogenation of acetylene to ethylene is presented. The catalyst comprises a layered structure, wherein the catalyst has an inner core and an outer layer of active material. The catalyst further includes a metal deposited on the outer layer, and the catalyst is formed such that the catalyst has an accessibility index between 3 and 500. | 06-17-2010 |
| 20100158765 | SCREENLESS INTERNALS FOR RADIAL FLOW REACTORS - An apparatus for contacting a bed of particulate material with a cross flowing fluid, which maintains the bed of particulate material within a retention volume. The apparatus includes partitions for retaining particles, with apertures disposed within the partitions. The apertures are covered by louvers that extend above the edges of the apertures to prevent solid particles from spilling through inlet apertures. | 06-24-2010 |
| 20100204530 | Preparing A Light-Olefin Containing Product Stream from an Oxygenate-Containing Feed Steam Using Reactors Directing a Flow of a Fluidized Dual-Function Catalyst System - The present invention provides a reactor system for converting an oxygenate-containing feed stream to an olefin-containing product stream. The system includes: (1) a first fluidized catalytic reactor for converting methanol to propylene, the first reactor having a fluidized catalyst system comprising a first catalyst and a second catalyst; (2) a second fluidized catalytic reactor communicating with the first fluidized catalytic reactor for cracking heavy olefins having four carbon atoms or greater into propylene, the second reactor having the fluidized catalyst system; (3) wherein the first catalyst is a non-zeolite molecular sieve catalyst; and (4) wherein the second catalyst is a zeolite molecular sieve catalyst. | 08-12-2010 |
| 20100234656 | Olefinic Feedstock Treatment Processes - Aromatic by-products are sorbed from mono-olefin-containing feedstocks of olefins having from about 6 to 22 carbon atoms per molecule that contain aromatic by-products having from 7 to 22 carbon atoms per molecule. A benzene-containing regenerant displaces and desorbs the aromatic by-products from the sorbent and a regeneration effluent is provided. The regeneration effluent is treated in a regeneration effluent distillation system to provide a benzene-rich stream and an aromatic by-products-containing stream. The latter is subjected to benzene-forming conditions and recycled to the regeneration effluent distillation system where benzene is recovered. | 09-16-2010 |
| 20100331590 | PRODUCTION OF LIGHT OLEFINS AND AROMATICS - Processes for the conversion of both straight- or branched-chain (e.g., paraffinic) as well as cyclic (e.g., naphthenic) hydrocarbons of a hydrocarbon feedstock into value added product streams are disclosed. The processes involve the use of both dehydrogenation and olefin cracking to produce both light olefins and aromatics in varying proportions depending on the feedstock composition and particular processing scheme. The processes are especially applicable to naphtha feedstocks comprising paraffins and naphthenes in the C | 12-30-2010 |
| 20110027141 | Aromatics Co-Production in a Methanol-to-Propylene Unit - The present invention provides a reactor system having: (1) a first reactor receiving an oxygenate component and a hydrocarbon component and capable of converting the oxygenate component into a light olefin and the hydrocarbon component into alkyl aromatic compounds; (2) a separator system for providing a first product stream containing a C | 02-03-2011 |
| 20110028771 | Aromatics Co-Production in a Methanol-to-Propylene Unit - The present invention provides a reactor system having: (1) a first reactor receiving an oxygenate component and a hydrocarbon component and capable of converting the oxygenate component into a light olefin and the hydrocarbon component into alkyl aromatic compounds; (2) a separator system for providing a first product stream containing a C | 02-03-2011 |
| 20110071020 | Selective Hydrogenation of Dienes in the Manufacture of MLAB - A process and catalyst are presented for the selective hydrogenation of branched diolefins and acetylenes to olefins. The process uses a catalyst having large pores, and a minimal amount of micropores. The catalyst is designed to have minimal diffusional resistance through the large pores, and to minimize the dehydrogenation of olefins to paraffins. | 03-24-2011 |
| 20110071328 | Selective Hydrogenation of Dienes in the Manufacture of MLAB - A process and catalyst are presented for the selective hydrogenation of branched diolefins and acetylenes to olefins. The process uses a catalyst having large pores, and a minimal amount of micropores. The catalyst is designed to have minimal diffusional resistance through the large pores, and to minimize the hydrogenation of olefins to paraffins. | 03-24-2011 |
| 20110116978 | Fluidized Bed Reactor with Back-Mixing for Dehydrogenation of Light Paraffins - An improved process and system for the endothermic dehydrogenation of an alkane stream is described. The process and system of the present invention comprise a back-mixed fluidized bed reactor. The alkane stream is dehydrogenated in a single reactor stage by contacting the alkane stream with a back-mixed fluidized bed of catalyst. Deactivated catalyst is withdrawn from the back-mixed fluidized reactor and heated to produce hot regenerated catalyst. The hot regenerated catalyst is returned to the back-mixed fluidized bed reactor at a rate sufficient to maintain the back-mixed fluidized bed reactor at substantially isothermal conditions. | 05-19-2011 |
| 20110118517 | Manufacturing Process for Branched and Linear Alkylated Benzene as Precursor for Enhanced Oil Recovery Surfactant - A process is presented for the preparation of surfactants that are useable in enhanced oil recovery. The surfactants are long chained sulfonated alkylaryl compounds. The process includes recovering linear and lightly branched paraffins from a hydrocarbon stream, dehydrogenating the paraffins, and then alkylating benzene with the olefins generated. The process uses pentasil zeolites to selectively separate the normal and lightly branched paraffins from the hydrocarbon stream. | 05-19-2011 |
