Patent application number | Description | Published |
20120321547 | METHOD AND SYSTEM FOR THE PRODUCTION OF POTASSIUM SULFATE FROM POTASSIUM CHLORIDE - A method and a system for the production of potassium sulfate. The method comprises reacting a source of water soluble potassium with a magnesium sulfate-containing substance in presence of an aqueous alcoholic solution. The system comprises a first reactor for dissolving a water soluble potassium in water into a first solution; a second reactor for dissolving magnesium sulfate hydrate in water and adding methanol into a second solution; a third reactor, adapted to receive the first and the second solutions, mixed then under stirring and cool them down into a slurry; a filter collecting and filtering the slurry from the third reactor; delivering, after rinsing of the solid part with methanol, chloride-free potassium sulfate, and a combined filtrate and rinsings; a column receiving and distilling the combined filtrate and rinsings, delivering methanol back to the second reactor and to the filter and a concentrated solution of magnesium chloride; a fourth reactor, adapted to receive the concentrated solution of magnesium chloride, which crystallizes upon cooling, and to treat the concentrate with sulfuric acid, delivering hydrochloric acid and a residual mass; a collector, adapted to absorb the hydrochloric acid delivered form the fourth reactor; and a fifth reactor, adapted to collect and crystallise the residual mass from the fourth reactor, for recycling to the second reactor as magnesium sulfate heptahydrate. | 12-20-2012 |
20130074655 | METHOD AND A SYSTEM FOR GOLD EXTRACTION WITH HALOGENS - The invention relates to a method for the extraction of precious metals, using halogens. It has been found that introducing halogens in the reactor in the form of hypohalites rather than free halogens simplified greatly the recycling of halogens by electrolysis. It increases the rate of addition of the halogens and significantly reduces secondary reactions with base metals such as iron. Operating under acidic conditions, the gold recovery has been found as high with hypochlorite as with elemental chlorine, with an active chlorine to ore ratio reduced by a factor of two to five. | 03-28-2013 |
20140107389 | METHOD AND COMPOSITION FOR SEQUESTRATION OF ARSENIC - A method for sequestrating arsenic oxides, comprising forming an insoluble and stable glass incorporating a fully oxidized form of arsenic generated by oxidation of an initial lower oxide of arsenic and stabilization by calcium salt formation. The glass composition for sequestration of arsenic comprises from 50 to 75% silica; from 0.5 to 3% Al | 04-17-2014 |
20140120012 | METHOD FOR SELECTIVE PRECIPITATION OF IRON, ARSENIC AND ANTIMONY - A method for selectively processing a polymetallic oxide solution containing a plurality of base metals comprising at least one of: Cu, Co, Ni, Zn associated with iron, comprising acid leaching the solution; recovering a filtered leachate; oxidizing the leachate; and adjusting the pH of the leachate in presence of a complexing agent; wherein the acidic solution is one of: i) a hydrochloric acid solution and ii) a sulfuric acid solution at a pH lower than about 1.5, and the complexing agent is one of: i) ammonium chloride and ii) ammonium sulfate, the step of adjusting the pH comprising raising the pH to a range between about 2.5 and about 3.5. | 05-01-2014 |
20150033913 | METHOD AND SYSTEM FOR GOLD RECOVERY - A method for recovering precious metal from an acidic pregnant solution resulting from halogen or hypohalite leaching of an ore, comprising lowering the ORP of the pregnant leachate with a reducing agent in the presence of slurried non-carboneous particles. The precious metal deposits on the surfaces of the particles and a barren solution comprising substantially all the halogen values of the pregnant solution in the form of sodium chloride, sodium bromide or hypohalites is recovered. | 02-05-2015 |
20150259765 | CLOSED LOOP METHOD FOR GOLD AND SILVER EXTRACTION BY HALOGENS - A method for extracting precious metals from a polymetallic ore, comprising a) generating hypochlorites from a salt brine; b) chlorination of the ore using hypochlorites under acidic conditions; c) filtering to collect a pregnant solution and treating the pregnant solution for collection of precious metals; d) filtering to separate the precious metals and a barren brine; e) purifying the barren brine; and f) recycling halogens from the purified brine in the form of hypohalites formed by electrolysis of the purified brine, and comprising hypochlorite and hypobromite; step b) further comprising scrubbing excess halogens using calcium hydroxide; treatng the pregnant solution in step c) comprises reducing an oxydo reduction potential of the pregnant solution and using calcium hydroxide for neutralization; and step e) comprising increasing the pH of the barren brine by addition of calcium hydroxide. | 09-17-2015 |
20150267275 | RECOVERY OF NICKEL AND COBALT FROM LATERITES BY SONIC ASSISTED SULFATATION - There is thus provided a method allowing the recovery of metallic values from laterites by the action of rather diluted sulfuric acid on nickel and cobalt-bearing laterites, at atmospheric pressure and near ambient temperature, assisted by ultrasonic treatment. With an acid concentration in the range for example between about 25 and about 50 weight % of sulfuric acid, under atmospheric pressure, sonication, extracting metallic values from the slurried laterites is thus achieved at room temperature. | 09-24-2015 |
Patent application number | Description | Published |
20080292229 | Compliant foil-fluid bearing support arrangement - A foil-fluid bearing assembly adapted for supporting a shaft within an outer bearing housing and is adapted for accommodating angular misalignment of the rotating shaft relative to the housing. | 11-27-2008 |
20090185766 | Compliant foil-fluid bearing support arrangement - A foil-fluid bearing assembly adapted for supporting a shaft within an outer bearing housing and is adapted for accommodating angular misalignment of the rotating shaft relative to the housing. | 07-23-2009 |
20140208760 | GAS TURBINE ENGINE WITH TRANSMISSION - A gas turbine engine with a transmission having a first rotatable member coupled to an engine spool, a second rotatable member coupled to a compressor rotor, and coupled rotatable members defining at least first and second alternate transmission paths between the first and second members. Each transmission path defines a different fixed transmission ratio of a rotational speed of the second member on a rotational speed of the first member. | 07-31-2014 |
20140260295 | GAS TURBINE ENGINE WITH TRANSMISSION AND METHOD OF ADJUSTING ROTATIONAL SPEED - A method of adjusting a rotational speed of the low pressure compressor rotor(s) of a gas turbine engine, including rotating the high pressure compressor rotor(s) with the high pressure turbine rotor(s) through the high pressure spool, rotating the low pressure turbine rotor(s) with a flow of exhaust gases from the high pressure turbine, rotating the low pressure spool with the low pressure turbine rotor(s), rotating a load of the engine with the low pressure spool, driving a rotation of the low pressure compressor rotor(s) with the low pressure spool through a variable transmission defining a variable transmission ratio between rotational speeds of the compressor rotor(s) and the low pressure spool, and adjusting the transmission ratio to obtain a desired rotational speed for the low pressure compressor rotor(s). A method of adjusting rotational speeds of a gas turbine engine and a gas turbine engine are also described. | 09-18-2014 |
20140290265 | GAS TURBINE ENGINE WITH TRANSMISSION - A multi spool gas turbine engine with a differential having a selectively rotatable member which rotational speed determines a variable ratio between rotational speeds of driven and driving members of the differential. The driven member is engaged to the first spool and a rotatable shaft independent of the other spools (e.g. connected to a compressor rotor) is engaged to the driving member. First and second power transfer devices are engaged to the first spool and the selectively rotatable member, respectively. A circuit interconnects the power transfer devices and allows a power transfer therebetween, and a control unit controls the power being transferred between the power transfer devices. Power can thus be transferred between the first spool and the selectively rotatable member to change the speed ratio between the first spool and the rotatable shaft. | 10-02-2014 |
20150176486 | GAS TURBINE ENGINE WITH TRANSMISSION - A gas turbine engine with a transmission having a variable ratio is discussed. A first gear train is in driving engagement with the low pressure spool and has a first output gear. A second gear train is in driving engagement with the high pressure spool and has a second output gear spaced apart from the first output gear. A third gear train defines a driving engagement between the low pressure spool and the low pressure compressor rotor with a variable transmission ratio. A fourth gear train is in driving engagement with the first and second output gears, and in driving engagement with the third gear train to determine the transmission ratio. A method of adjusting a speed of a low pressure compressor rotor of a gas turbine engine is also discussed. | 06-25-2015 |
Patent application number | Description | Published |
20110179140 | SYSTEM AND METHOD FOR REMOTELY CONTROLLING NETWORK RESOURCES - A personal network may be established by interconnecting a plurality of satellites as part of the personal network. Each satellite may be configured to communicate with one or more other satellites. On any given one of the plurality of satellites, data indicating a connectivity status for the one or more other satellites is automatically received, and information indicating a capability of the one or more other satellites is automatically received. The given satellite may be configured to enable at least one other corresponding satellite in the plurality of satellites to be made available for use, so that a capability of the at least one other corresponding satellite is made available for the given satellite. | 07-21-2011 |
20120209958 | SYSTEM AND METHOD FOR REMOTELY CONTROLLING NETWORK RESOURCES - A personal network may be established by interconnecting a plurality of satellites as part of the personal network. Each satellite may be configured to communicate with one or more other satellites. On any given one of the plurality of satellites, data indicating a connectivity status for the one or more other satellites is automatically received, and information indicating a capability of the one or more other satellites is automatically received. The given satellite may be configured to enable at least one other corresponding satellite in the plurality of satellites to be made available for use, so that a capability of the at least one other corresponding satellite is made available for the given satellite. | 08-16-2012 |
20140330950 | SYSTEM AND METHOD FOR ENABLING THE ESTABLISHMENT AND USE OF A PERSONAL NETWORK - A personal network may be established by interconnecting a plurality of satellites as part of the personal network. Each satellite may be configured to communicate with one or more other satellites. On any given one of the plurality of satellites, data indicating a connectivity status for the one or more other satellites is automatically received, and information indicating a capability of the one or more other satellites is automatically received. The given satellite may be configured to enable at least one other corresponding satellite in the plurality of satellites to be made available for use, so that a capability of the at least one other corresponding satellite is made available for the given satellite. | 11-06-2014 |
20150257128 | SYSTEM AND METHOD FOR COMBINING MEMORY RESOURCES FOR USE ON A PERSONAL NETWORK - A personal network may be established by interconnecting a plurality of satellites as part of the personal network. Each satellite may be configured to communicate with one or more other satellites. On any given one of the plurality of satellites, data indicating a connectivity status for the one or more other satellites is automatically received, and information indicating a capability of the one or more other satellites is automatically received. The given satellite may be configured to enable at least one other corresponding satellite in the plurality of satellites to be made available for use, so that a capability of the at least one other corresponding satellite is made available for the given satellite. | 09-10-2015 |