Abstract: The present disclosure relates to a purge system for a vapor compression system including an emission canister. The emission canister includes a load cell disposed in an interior of the emission canister, a base supported by the load cell, and an adsorbent material disposed on the base. The adsorbent material is configured to adsorb a refrigerant flowing through the emission canister, and the load cell is configured to monitor a weight of the adsorbent material and the refrigerant within the emission canister.

Abstract: A system comprising an ammonia cracking unit in which ammonia is split into hydrogen and nitrogen and a hydrogen fueling station for fueling of vehicle tanks with hydrogen from the ammonia cracking unit which comprises gas operated valves (GOVs), one or more hydrogen compressing units wherein the hydrogen from the ammonia cracking unit is compressed, and one or more dispensing units for dispensing the compressed hydrogen to vehicle tanks which each comprise a nozzle through which the hydrogen is passed to the vehicle tank, wherein nitrogen from the ammonia cracking unit is used in e.g.: the operation of one or more of the GOVs; for blanketing one or more of said hydrogen compressing units; for blanketing and/or purging one or more of the dispensing units; for drying one or more of the nozzles between uses to prevent nozzle freeze on.

Abstract: An apparatus and process for the compression, expansion, evaporation, and liquefaction of gases or gaseous mixtures consisting of a gas liquefaction column comprising successive chambers made of balloons resembling those used in pneumatic suspensions, and double-piston bases in between the upper and lower end of each chamber. Some of the double-piston bases are fixed while others in between are mobile. The group of mobile double-piston bases is activated in a linear to-and-fro vertical stroke while the other group of double-piston bases remains stationary. This results in consecutive suction and compression of the chambers, creating a Joule-Thomson effect at each of them. This results in the cooling and liquefaction of the gas or gaseous mixture. The apparatus also comprises humidity extractors, and different types of valves and piping.

Abstract: A compressor installation with drying device for compressed gas, with the drying device containing a housing with a drying zone and a regeneration zone; whereby in the housing a drum with a drying agent is fitted rotatably; and whereby the pressure line comprises a heat-exchanger for cooling the compressed gas before it enters said drying zone, whereby a tap-off pipe is connected to the discharge line that is connected to a cooling inlet of the heat-exchanger, while the heat-exchanger further comprises a cooling outlet that is connected to the inlet of the regeneration zone, while the outlet of the regeneration zone is connected to said pressure line.

Abstract: A high efficiency fuel cell system includes a topping fuel cell assembly that includes a topping cathode portion and a topping anode portion, as well as a bottoming fuel cell assembly that includes a bottoming cathode portion and a bottoming anode portion. The assembly also includes a flue gas generating device configured to provide flue gas to the topping cathode portion and/or the bottoming cathode portion, and an oxidizer assembly configured to (i) oxidize anode exhaust output from the bottoming anode portion with air and/or oxygen to generate carbon dioxide-containing exhaust and (ii) generate waste heat for heating the flue gas before the flue gas is provided to the topping cathode portion and/or the bottoming cathode portion. A separation assembly is configured to receive the carbon dioxide-containing exhaust from the oxidizer assembly and to separate carbon dioxide from the carbon dioxide-containing exhaust.

Abstract: Systems and methods for the enhanced recovery of ethane and heavier hydrocarbons using an absorbing agent. Typical absorbing agents include one or more C3+ alkanes. The systems and methods separate components of a feed gas containing methane and heavier hydrocarbons, which maximizes ethane recovery, without requiring appreciable increases in capital and operating costs, and improves the safety margin with respect to the risk of CO2 freeze-out.

Abstract: A method of using the natural gas storage facility to reduce the effect of diurnal demand on a natural gas source includes introducing natural gas into the natural gas storage facility, separating the natural gas into a heavy natural gas component and a light natural gas component, and retaining the components during a non-peak period of demand. The natural gas storage facility includes a guard bed system and an adsorption bed system. The method also includes releasing the heavy and light natural gas components, mixing them into a released natural gas component product and introducing it to the natural gas source during a peak period of demand.

Abstract: A process for removing heavy hydrocarbons from a natural gas stream comprises passing the natural gas stream thought a TSA adsorbent unit to adsorb heavy hydrocarbons, regenerating the TSA adsorbent by heating to form a contaminant-containing gas phase, cooling the contaminated gas phase to separate water and heavy hydrocarbon liquids to form a third gas phase and directing the third gas phase to a PSA unit to adsorb heavy hydrocarbons from the third gas phase. The product from the PSA unit can be sent to pipeline or recycled to the TSA unit for further hydrocarbon removal and recovery.

Abstract: The invention provides systems and methods for separating ethane and heavier hydrocarbons from a natural gas stream. In aspects of the invention, an adsorption unit is integrated with a cryogenic gas processing plant in order to overcome methane recovery limitations by sending the tail gas from the adsorption unit to the cryogenic gas processing plant to recover methane that would otherwise be lost.

Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.

Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.

Abstract: Physical solvent is regenerated using flashing and stripping processes to produce an ultra-lean solvent. In especially preferred aspects, flashed C1-C3 hydrocarbons are recycled to the absorber, while C4+ hydrocarbons are recovered from the CO2 that is removed from the solvent. It is further preferred that depressurization of the rich solvent provides most of the refrigeration duty.

Abstract: A method and apparatus for separating nitrogen from a mixed stream comprising nitrogen and methane employes a monolith sorption contactor formed of a unitary construction of active carbon, the contactor housing one or more separation flow channels, the one or more channels having at least one inlet to, and at least one outlet from, said contactor, the one or more channels defining one or more first internal surfaces of the monolith sorption contactor, the contactor further comprising one or more first external surfaces provided with a barrier layer, the first external surfaces being different from the first internal surfaces. The mixed stream is passed through at least one of the separation flow channels, where methane is sorbed. The contactor can be regenerated by contacting the contactor with a heat exchange fluid via the barrier layer at one or more of the external surfaces.

Abstract: An IGCC plant has a precombustion decarbonization unit in which acid gas is removed from a combustion gas before the combustion gas enters a combustion turbine. In one preferred configuration, a sulfur removal unit removes hydrogen sulfide from a feed gas before the desulfurized feed gas enters an autorefrigeration unit in which carbon dioxide is removed. In another preferred configuration, hydrogen sulfide is converted to carbonyl sulfide in a dryer, and the carbonyl sulfide is absorbed in the liquid carbon dioxide that is prepared from the feed gas using autorefrigeration.

Abstract: A recycling apparatus for spent protective atmosphere gas contaminated with fouling organic decomposition byproduct materials. The recycling apparatus includes a compressor having an inlet connected to a spent protective atmosphere gas supply line, and a solvent supply configured to supply solvent to a gas passage at or upstream of the compressor. The recycling apparatus also includes a first chamber connected to an outlet of the compressor, where the first chamber is configured to receive compressed gas from the compressor and to collect a mixture including the solvent and any contaminants entrapped or dissolved in the solvent.

Abstract: The invention provides a process for producing purified natural gas from feed natural gas comprising water and carbon dioxide, the process comprising the steps of: (a) removing water from the feed natural gas to obtain natural gas depleted in water and comprising carbon dioxide; (b) contacting the natural gas obtained in step (a) with solid sorbent comprising a metal organic framework to remove at least part of the carbon dioxide, thereby obtaining the purified natural gas.

Abstract: At least one gaseous impurity, for example silane, is removed by absorption from a feed gas stream, for example a gas stream comprising nitrogen and hydrogen, the gaseous impurity being less volatile than the feed gas stream. The absorption is effected by a sub-cooled absorbent at a first cryogenic temperature and a first pressure. The absorbent is typically propane. The absorption may be conducted in a liquid-vapour contact column (130). Absorbent containing impurity may be regenerated in a regeneration vessel 150 and returned to the column (130).

Abstract: A recycling apparatus for spent protective atmosphere gas contaminated with fouling organic decomposition byproduct materials. The recycling apparatus includes a compressor having an inlet connected to a spent protective atmosphere gas supply line, and a solvent supply configured to supply solvent to a gas passage at or upstream of the compressor. The recycling apparatus also includes a first chamber connected to an outlet of the compressor, where the first chamber is configured to receive compressed gas from the compressor and to collect a mixture including the solvent and any contaminants entrapped or dissolved in the solvent.

Abstract: A method for removing hydrogen sulphide (H2S) from a natural gas stream comprising methane (CH4) and H2S comprises:—cooling the natural gas stream in a heat exchanger assembly (13,16,18);—feeding at least part of the cooled natural gas stream through a feed conduit (19,21) into a cyclonic expansion and separation device (1) in which the cooled natural gas stream is expanded in a nozzle (4) and thereby further cooled to a temperature and pressure below the dew point of H2S and is separated by inducing the cooled natural gas stream to swirl in a tubular separation chamber (9) thereby inducing centrifugal forces to separate the cooled natural gas stream into a cooled low density fluid fraction, which is H2S depleted and methane enriched, and a cooled high density fluid fraction, which is H2S enriched and methane depleted;—feeding the cooled low density fluid fraction to a product gas conduit (33) which is connected to the heat exchanger assembly (14) for cooling the natural gas stream fed to the cyclonic expansi

Abstract: A process for extracting natural gas liquids (NGLs) from natural gas that involves contacting natural gas from one source with crude, or heavy, oil from a different source under conditions that promote enrichment of the crude or heavy oil with NGLs from the natural gas. Apart from functioning as an absorbent fluid, the crude or heavy oil also functions as the carrier medium for the absorbed. NGLs. When practicing the process, unlike conventional methods, there is no need to regenerate the absorbent fluid, in this case the crude and heavy oil, for recycling.

Abstract: A natural gas liquid plant includes a separator (103) that receives a cooled low pressure feed gas (4), wherein the separator (103) is coupled to an absorber (108) and a demethanizer (110). Refrigeration duty of the absorber (108) and demethanizer (110) are provided at least in part by expansion of a liquid portion of the cooled low pressure feed gas (4) and an expansion of a liquid absorber bottom product (19), wherein ethane recovery is at least 85 mol % and propane recovery is at least 99 mol %. Contemplated configurations are especially advantageous as upgrades to existing plants with low pressure feed gas where high ethane recovery is desirable.

Abstract: Carbon dioxide-containing feed stream such as flue gas is treated to produce a high-purity carbon dioxide stream by a series of steps including removing SOx and NOx with activated carbon, carrying out subambient-temperature processing to produce a product stream and a vent stream, and treating the vent stream by pressure swing adsorption or by physical or chemical absorption to produce a product stream which is recycled to the feed stream.

Abstract: An Apparatus for purifying a feed stream containing carbon dioxide in which the feed stream, after having been compressed and dried, is partly cooled and then used to reboil a stripping column. Thereafter, the feed stream is further cooled and expanded to a lower operational temperature of the stripping column. A carbon dioxide product stream composed of the liquid column bottoms of the stripping column is expanded at one or more pressures to generate refrigeration, then fully vaporized within the main heat exchanger and compressed by a compressor to produce a compressed carbon dioxide product. Refrigeration is recovered in the main heat exchanger from a column overhead stream extracted from the stripping column within the main heat exchanger either directly or indirectly by auxiliary processing in which carbon dioxide is further separated and optionally recycled back to the main compressor used in compressing the feed stream.

Abstract: Ethane is separated from a carbon dioxide-containing feed gas in a demethanizer that receives a rich subcooled reflux stream at very low temperature. Freezing of carbon dioxide is prevented by feeding a temperature-controlled vapor portion of the feed gas to the column, wherein the temperature of the vapor portion is adjusted by routing a portion of the expander discharge through a heat exchanger in response to the tray temperature in the demethanizer. Thus, high separation efficiency is achieved at reduced, or even eliminated carbon dioxide freezing.

Abstract: LNG is pumped to supercritical pressure and vaporized, preferably in an offshore location to thereby form a natural gas stream with an intermediate temperature. A first portion of that stream is then processed in an onshore location to remove at least some non-methane components to thereby form a lean LNG, which is then combined with a second portion of that stream to form a sales gas having desired chemical composition. The intermediate temperature and the split ratio of the gas stream in first and second portion are a function of the concentration of the non-methane components in the LNG.

Abstract: The invention relates to a system unit for desorbing carbon dioxide and other impurities from highly pressurized methanol. Said system unit comprises at least one or more expansion vessels arranged in succession, at least one heat exchanger, and at least one liquid/gas separator. The inventive system unit contains: a) a line (1) through which the intensely cooled methanol leaving expansion vessel (C) is introduced into the heat exchanger (E) from underneath, and; b) a line (2), though which the heated methanol is drawn out of the heat exchanger (E) from the top, and which serves to connect said heat exchanger to a liquid/gas separator inside of which the remaining carbon dioxide still contained in the methanol is desorbed and separated out to the greatest possible extent. This system unit enables the cold due to evaporation, said cold resulting during the desorption of carbon dioxide, to be obtained inside a heat exchanger and constitutes an important cold energy source for carrying out absorption.

Abstract: A process and apparatus for separating the components of a multi-component gas stream comprising light and intermediate volatility components. The process includes contacting the multi-component gas stream with a lean solvent in an absorber to produce a light component overhead stream and a rich solvent bottoms stream, flashing the rich solvent bottoms stream in at least one reduced pressure stage, recycling the lean solvent to the absorber, heat exchange cooling of the light component overhead stream, using at least one pressure reduction device for auto-refrigeration cooling, vapor/liquid separating the light component overhead stream in a vapor/liquid separator, reheating a vapor product stream from the vapor/liquid separator against the light component overhead stream, and removing the condensed intermediate component liquid from the vapor/liquid separator.

Abstract: An integrated process and installation implementing a unit of adsorption (3) and a cryogenic unit (9), in which a gas of food containing of CO2 is sent to the unit of adsorption (3) where it separates in a first flow enriched out of CO2 (6) and a first flow impoverished of CO2 (5), first flow enriched out of CO2 being sent to the cryogenic unit (9) where it is separate in a second flow rich in CO2 (11) and a second flow low in CO2 (10). The first flow enriched out of CO2 (6) resulting from the unit from adsorption (3) is sent towards means of homogenization (17), a such storage capacity or analogue, making it possible to attenuate the cyclic variations of flow, composition and/or gas pressure, then subjected to at least a stage of intermediate compression (7) before its entry in the cryogenic unit (9). The first gas enriched out of CO2 (6) outgoing by the unit by adsorption (3) contains between 40 and 95% of CO2, preferentially between 60 and 85% of CO2.

Abstract: A system for the purification and recycle of impure argon is disclosed herein. The system of the present invention can produce very high purity argon, i.e., about 1 ppb or less of impurities. In one embodiment, a cryogenic separation apparatus is used to remove the nitrogen, hydrocarbon, and hydrogen impurities from the argon stream. A catalyst bed is then operated at ambient temperature to remove hydrogen, oxygen, and carbon monoxide impurities to provide the purified argon product.

Abstract: A process for the recovery of ethane and heavier hydrocarbon components from a hydrocarbon feed gas stream. Feed gas stream is cooled into a first and second cooled streams. First and second cooled streams are sent to a cold absorber and separated into a first gas stream and a first liquid stream. First gas stream is expanded and sent to a fractionation tower. At least a part of the first liquid stream is sent to a pre-demethanizer stripper tower. Stripper tower produces a stripper overhead stream and a stripper bottoms stream. Stripper overhead vapor stream is cooled and sent to the fractionation tower as second reflux stream. Stripper bottoms stream is supplied to the fractionation tower. Temperatures and pressures of the streams and columns are maintained to recover a major portion of ethane and heavier hydrocarbon components as a bottoms product stream, and produce a residue gas stream at the fractionation tower overhead.

Abstract: The invention relates to a method for treating a natural gas, saturated or not with water, containing essentially hydrocarbons, a substantial amount of hydrogen sulfide and possibly carbon dioxide. The method of the invention comprises a condensation stage intended to condense a major part of the water, a distillation stage wherein a gaseous effluent depleted in hydrogen sulfide and substantially free of water is recovered, and a contacting stage wherein the gaseous effluent from the previous stage is contacted with a solvent so as to obtain a treated gas substantially free of hydrogen sulfide and possibly of carbon dioxide.

Abstract: A gas processing plant has a de-ethanizer and a refluxed absorber, wherein the absorber operates at higher pressure than the de-ethanizer, and wherein at least a portion of the absorber bottoms product is expanded to provide cooling for the absorber reflux stream and/or the distillation column feed stream. Especially contemplated gas processing plants include propane and ethane recovery plants, and where the gas processing plant is an ethane recovery plant, it is contemplated that the ethane product comprises no more than 500 ppm carbon dioxide.

Abstract: A two-column NGL recovery plant includes an absorber (110) and a distillation column (140) in which the absorber (110) receives two cooled reflux streams, wherein one reflux stream (107) comprises a vapor portion of the NGL and wherein the other reflux stream (146) comprises a lean reflux provided by the overhead (144) of the distillation column (140). Contemplat configurations are especially advantageous in a upgrade of an existing NGL plant and typically exhibit C3 recovery of at least 99% and C2 recovery of at least 90%.

Abstract: A method and system for the purification and recycle of impure argon is disclosed. The system and process of the present invention can produce very high purity argon, i.e., about 1 ppb or less of impurities. In one embodiment of the invention, a cryogenic separation apparatus is used to remove the nitrogen, hydrocarbon, and hydrogen impurities from the argon stream. A catalyst bed is then operated at ambient temperature to remove hydrogen, oxygen, and carbon monoxide impurities to provide the purified argon product. Also disclosed is a method to minimize to loss of the purified argon product during regeneration of the catalyst bed.

Abstract: A gas processing plant has a de-ethanizer (106) and a refluxed absorber (103), wherein the absorber (103) operates at higher pressure than the de-ethanizer (106), and wherein at least a portion of the absorber bottoms product (7) is expanded to provide cooling for the absorber reflux stream and/or the distillation column feed stream. Especially contemplated gas processing plants include propane and ethane recovery plants, and where the gas processing plant is an ethane recovery plant, it is contemplated that the ethane product comprises no more than 500 ppm carbon dioxide.

Abstract: A process and apparatus for separating the components of a hydrocarbon gas feed stream is disclosed. A multi-component hydrocarbon gas feed stream is contacted with a solvent in an absorber to produce a first overhead stream that is enriched in a first component and a rich solvent bottoms stream that is enriched a second component. The rich solvent bottoms stream is flash vaporized to recover the second component as a second overhead stream and to produce a lean solvent stream that is returned to the absorber. During the flash vaporization process, the rich solvent bottoms stream is contacted with a stripping gas that is a portion of the first overhead stream. This stripping process enhances the recovery of the second component during the flash vaporization.

Abstract: A plant for producing liquefied natural gas comprises a carbon dioxide recovery apparatus for natural gas absorbing and removing carbon dioxide from natural gas, a liquefying apparatus having a steam turbine, for liquefying the natural gas from which carbon dioxide has been removed by the carbon dioxide recovery apparatus, a boiler equipment for supplying steam to the steam turbine of the liquefying apparatus, and a carbon dioxide recovery apparatus for combustion exhaust gas including an absorption tower for absorbing carbon dioxide from combustion exhaust gas exhausted from the boiler equipment by absorbing liquid, and a regeneration tower for separating and recovering carbon dioxide from the absorbing liquid.

Abstract: A process and apparatus for separating the components of a hydrocarbon gas feed stream is disclosed. A multi-component hydrocarbon gas feed stream is contacted with a solvent in an absorber to produce a first overhead stream that is enriched in a first component and a rich solvent bottoms stream that is enriched a second component. The rich solvent bottoms stream is flash vaporized to recover the second component as a second overhead stream and to produce a lean solvent stream that is returned to the absorber. During the flash vaporization process, the rich solvent bottoms stream is contacted with a stripping gas that is a portion of the first overhead stream. This stripping process enhances the recovery of the second component during the flash vaporization.

Abstract: Provided are a system and method for nitrous oxide purification, wherein the nitrous oxide product is for use in semiconductor manufacturing. The system and process involve a first sub-system having a purification tank for holding a liquefied nitrous oxide, therein; a vaporizer in communication with the purification tank to receive, vaporize and convey a nitrous oxide vapor back to the purification tank; a distillation column disposed on a distal end of the purification tank to receive a nitrous oxide vapor; a condenser disposed on the distillation column, wherein light impurities are removed and wherein a nitrous oxide devoid of light impurities is conveyed and converted into vapor in the vaporizer. A second sub-system having a first dry bed vessel is disposed downstream of the vaporizer to receive the vapor and reacting the acid gas therein; a second dry bed vessel is disposed downstream of the first dry bed vessel for removing water and ammonia in the vapor.

Abstract: Provided are a system and method for nitrous oxide purification, wherein the nitrous oxide product for use in semiconductor manufacturing. The system and process involve a first sub-system having a purification tank for holding a liquefied nitrous oxide, therein; a vaporizer in communication with the purification tank to receive, vaporize and convey a nitrous oxide vapor back to the purification tank; a distillation column disposed on a distal end of the purification tank to receive a nitrous oxide vapor; a condenser disposed on the distillation column, wherein light impurities are removed and wherein a nitrous oxide devoid of light impurities is conveyed and converted into vapor in said vaporizer. A second sub-system having a first dry bed vessel is disposed downstream of the vaporizer to receive the vapor and reacting the acid gas therein; a second dry bed vessel downstream of the said first dry bed vessel for removing water and ammonia in the vapor.

Abstract: The present invention provides a method and apparatus for producing a pressurized high purity liquid carbon dioxide stream in which a feed stream composed of carbon dioxide vapor is purified within a purifying filter and then condensed within a condenser. The result liquid is then alternately introduced and dispensed from two first and second pressure accumulation chambers. The first and second pressure accumulation chambers are heated by electrical heaters to pressurize the liquid to the required or desired delivery pressure of the pressurized liquid carbon dioxide stream. Such stream is alternately extracted from the first and second pressure accumulation chambers on a continuous basis in which one of the first and second pressure accumulation chambers acts in a dispensing role while the other is being filled. The pressurized liquid carbon dioxide stream can be further filtered within a particulate filter.

Abstract: A method for recovering a condensable gas from a mixed gas uses a condensable gas recovering apparatus. The apparatus comprises a compressor for compressing a mixed gas comprising a condensable gas and an incondensable gas, a mixed gas separator including a cooler and an adsorbent that adsorbs the incondensable gas, and a vacuum exhauster. The method comprises the steps of introducing the mixed gas highly compressed by the compressor into the mixed gas separator, liquefying and recovering the condensable gas by cooling the mixed gas separator with the cooler while the adsorbent adsorbs the incondensable gas contained in the mixed gas in a high pressure state, and exhausting the incondensable gas from the adsorbent in a low pressure state where the gas in the mixed gas separator has been exhausted by the vacuum exhauster. Therefore, recovery of the condensable gas is carried out with high reliability, and mixing of a large quantity of the condensable gas into the incondensable gas is easily prevented.

Abstract: Hydrogen gas from an generator (1) is occluded in a hydrogen recovery container (20), thereafter, in the initial stage during which hydrogen gas is released from the hydrogen recovery container (20), initially purged hydrogen gas containing much amount of impure gas is introduced from the hydrogen recovery container (20) to a gas tank (2) and saved therein, then, hydrogen gas having high purity released from a hydrogen absorbing alloy in the hydrogen recovery container (20) is refluxed to the generator (1), and this process comprising absorbing and releasing of hydrogen gas in the hydrogen recovery container (20) and saving in the gas tank (2) is repeated once or several times, successively, the hydrogen gas containing much amount of impure gas saved in the gas tank (2) is introduced in the hydrogen recovery container (20) and occluded therein, thereafter, in the initial stage during which hydrogen gas is released from the hydrogen recovery container (20), the hydrogen gas containing much amount of impure gas

Abstract: Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'>Pe. The process includes at least one step selected from the group comprised by:a filtration step of at least one impurity in solid state,and an adsorption step of at least one impurity in liquid or gaseous state;and in which there is recovered at least one portion of the cryogenic fluid at least partially purified.

Abstract: Process and apparatus for the purification of a cryogenic fluid in liquid, diphase, gaseous or supercritical state, having boiling point Pe, with at least one of its impurities having a boiling point Pe', with Pe'>Pe. The process includes at least one step selected from the group comprised by:a filtration step of at least one impurity in solid state,and an adsorption step of at least one impurity in liquid or gaseous state;and in which there is recovered at least one portion of the cryogenic fluid at least partially purified.

Abstract: A process and apparatus for the preparation of a cryogenic fluid in the high purity liquid state, such as liquid argon, liquid helium or liquid nitrogen of high purity, substantially free from at least one of the impurities which it contains. The cryogenic fluid in the liquid state to be purified is placed in contact with an adsorbent permitting the adsorption of at least one of the impurities, and the cryogenic fluid is recovered in the high purity liquid state, characterized in that cooling of at least a proportion of the adsorbent is maintained with purified cryogenic fluid in the liquid state during at least a part of the duration of the stoppage stage separating a purification cycle N and a purification cycle N+1, which are successive.

Abstract: A process and apparatus are provided for recovering volatile liquid vapors from an air-volatile liquid vapor mixture. The process includes: (1) cooling the mixture to condense volatile liquid vapors and moisture; (2) collecting the condensed volatile liquid vapors and moisture; (3) circulating the cooled and dehumidified mixture through a bed of adsorbent; and (4) desorbing and recovering the volatile liquids from the bed. The apparatus includes a refrigeration unit, a cooler for cooling the mixture, two reaction vessels each including a bed of adsorbent, a pump, an absorber tower and a valve and conduit system for circulating the mixture through the various components of the apparatus. Heat may be recovered from the refrigerant and used to heat the bed during desorption.

Abstract: Method and apparatus for removing trace levels of impurities from gases stored cryogenically in a storage vessel in liquid form by passing a vaporized portion of liquified gas from the storage vessel through a bed of adsorbent while using the liquified gas to cool the adsorbent. Vaporized gas resulting from cooling of the adsorbent with the stored liquified gas can be combined with the vapor withdrawn from the storage vessel prior to being passed through the bed of adsorbent. Liquified gas can be withdrawn from the storage vessel, vaporized and the vaporized gas combined with the vaporized gas from the storage vessel prior to being passed through the bed of adsorbent.

Abstract: The present invention is directed to two embodiments of a process for recycling an impure argon effluent from a silicon crystal growing furnace using cryogenics. The first embodiment uses cryogenic distillation techniques, and the second embodiment uses cryogenic adsorption, both of which use catalytic treatments and adsorption in conjunction with their cryogenic process steps to provide a pure argon recycle stream for a silicon crystal growth furnace.

Abstract: Apparatus for recovering high-boiling point solvents which comprises: a honeycomb-structured rotor 1 having an adsorbent supported thereon; a separator 3 for partitioning the neighborhood of each end face of the rotor into two regions, adsorption zone 5 and desorption zone 4; fan means F.sub.1 that supplies the adsorption zone 5 with air containing a solvent boiling at 150.degree. to 300.degree. C. and which causes part of the clean gas effluent a from the opposite end face of the rotor to be released into the air atmosphere while the remainder is supplied into the desorption zone 4; heating means H for heating the clean gas; cooling means C for separating a solvent enriched gas S into a liquefied product L to be recovered and a cooled lean gas V; and return means F.sub.2 for turning the cooled lean gas V back to the feed gas.