| Patents for F25J 3 - Processes or apparatus for separating the constituents of gaseous mixtures involving the use of liquefaction or solidification (11,467) |
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| 05/14/1991 | US5014773 Liquefied gas boilers |
| 05/14/1991 | CA1284096C Control method to maximize argon recovery from cryogenic air separation units |
| 05/08/1991 | EP0425738A1 Process for the production of high pressure nitrogen with split reboil-condensing duty |
| 05/07/1991 | CA1283847C Cryogenic nitrogen generator with nitrogen expander |
| 05/07/1991 | CA1283846C Air separation process with modified single distillation columnnitrogen generator |
| 04/30/1991 | US5011521 Liquefaction, expansion, stripping |
| 04/30/1991 | CA1283599C Process and facility for the recovery of the heavier hydrocarbons of a gas mixture |
| 04/23/1991 | CA1283354C Process and apparatus for controlling argon column feedstreams |
| 04/17/1991 | EP0422974A1 Process and installation for the production of gaseous oxygen in variable quantities by the distillation of air |
| 04/17/1991 | EP0400046A4 Optimized intermediate height reflux for multipressure air distillation |
| 04/10/1991 | CN1050605A Process and apparatus for producing nitrogen from air |
| 04/09/1991 | US5006139 Condensation of two nitrogen streams at different pressures in two reboiler/condensers in the low pressure column to provide column reboil |
| 04/09/1991 | US5006138 Pollution control; closed cycle refrigeration system to condense hydrocarbons or chemical from air mixture |
| 04/09/1991 | US5006137 Nitrogen generator with dual reboiler/condensers in the low pressure distillation column |
| 04/03/1991 | EP0420725A1 Refrigeration production process, the refrigeration cycle used and application in the distillation of air |
| 04/03/1991 | EP0419623A1 Cryogenic separation of gaseous mixtures. |
| 03/27/1991 | EP0419092A2 Separation of air |
| 03/27/1991 | CN1050260A Cryogenic air separation process and apparatus |
| 03/26/1991 | CA1281995C Process for the recovery of hydrogen/heavy hydrocarbons from hydrogen-lean feed gases |
| 03/26/1991 | CA1281993C Method and apparatus for conditioning the freezing zone liquid feedstream in the cryogenic separation of carbon dioxide and other acid gases from methane by the use of distillation and a controlled freezing zone |
| 03/20/1991 | EP0418139A1 Cryogenic air separation process and apparatus |
| 03/20/1991 | EP0417922A1 Producing pure carbon dioxide |
| 03/19/1991 | US5001721 Apparatus for purifying laser gas |
| 03/19/1991 | US5000925 Hydrogen and carbon dioxide coproduction apparatus |
| 03/13/1991 | EP0232426B1 Oxygen gas production unit |
| 03/13/1991 | CA2025013A1 Cryogenic air separation process and apparatus |
| 03/05/1991 | CA1280969C Air separation method with integrated gas turbine |
| 03/05/1991 | CA1280968C Suitable distillation packing for the cryogenic separation of air |
| 03/05/1991 | CA1280967C Process to recover hydrogen-free higher boiling synthesis gas component |
| 03/05/1991 | CA1280966C Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery |
| 03/05/1991 | CA1280965C Double column air separation apparatus and process with hybrid upper column |
| 03/05/1991 | CA1280964C Separating argon/oxygen mixtures using a structured packing |
| 02/26/1991 | CA1280686C Process for the production of nitrogen with oxygen-enriched recycle |
| 02/20/1991 | EP0413631A1 Nitrogen production process |
| 02/19/1991 | US4994098 Production of oxygen-lean argon from air |
| 02/19/1991 | CA1280360C Air separation process with waste recycle for nitrogen and oxygen production |
| 02/19/1991 | CA1280359C Nitrogen generator with waste distillation and recycle of waste distillation overhead |
| 02/19/1991 | CA1280358C Ultra pure liquid oxygen cycle |
| 02/19/1991 | CA1280357C Process for the production of high pressure nitrogen |
| 02/19/1991 | CA1280356C Process for the production of high pressure nitrogen with split reboil-condensing duty |
| 02/19/1991 | CA1280355C Air separation process using packed columns for oxygen and argon recovery |
| 02/19/1991 | CA1280354C Process for producing liquid helium |
| 02/13/1991 | EP0412793A1 Process and apparatus for producing nitrogen from air |
| 02/13/1991 | EP0211957B1 Apparatus for producing high-purity nitrogen and oxygen gases |
| 02/07/1991 | DE3925662A1 Nitrogen washing of ammonia synthesis gas - starts at prodn. process with double distn. stage |
| 02/05/1991 | US4990168 Recycling to feed gas stream; passive process |
| 01/30/1991 | EP0410845A1 Recovery of carbon dioxide plant vent gas using membranes |
| 01/30/1991 | EP0410832A1 Evaporator-condenser for a double column air separation apparatus |
| 01/30/1991 | EP0410831A1 Argon producing air distillation unit |
| 01/30/1991 | EP0395704A4 Air fractionation improvements for nitrogen production |
| 01/30/1991 | CN1011438B Method for partial condensation of hydrocarbon gas mixture |
| 01/29/1991 | US4987744 Heat exchanging; refrigeration |
| 01/29/1991 | CA2021730A1 Argon fabricating air distillating machine |
| 01/23/1991 | EP0409688A1 Process and installation for supplying gas to a gas distribution network |
| 01/23/1991 | CN1048683A Dry, high purity nitrogen production process and system |
| 01/16/1991 | EP0393029A4 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents |
| 01/09/1991 | EP0407136A2 Generation and purification of nitrogen. |
| 01/08/1991 | US4983194 Production of high purity argon |
| 01/02/1991 | CN1048262A Heat exchanger for condensing vapor containing non-condensable gases |
| 01/02/1991 | CA1278504C Dual-zone boiling process |
| 12/20/1990 | DE3919627A1 Nitrogen removal - from natural gas contg. carbon di:oxide by low temp. rectification in several sepn. stages |
| 12/18/1990 | US4977746 Distillation in apparatus containing a low and a medium pressure column |
| 12/18/1990 | US4977745 Method for the recovery of low purity carbon dioxide |
| 12/12/1990 | EP0402045A1 Air separation |
| 12/11/1990 | US4976849 Efficient separation of ethane, propane, heavier hydrocarbons |
| 12/06/1990 | CA2018238A1 Air separation |
| 12/05/1990 | EP0400046A1 Optimized intermediate height reflux for multipressure air distillation |
| 12/04/1990 | US4975259 Method of liquefying and condensing nitrogen trifluoride and a method of purifying nitrogen trifluoride |
| 11/29/1990 | DE3916892A1 Recovering pure gas by freezing out solvent vapour - by heat exchange with cryogenic fluid in surrounding jacket |
| 11/28/1990 | EP0399675A2 Closed system refrigeration using a turboexpander |
| 11/28/1990 | EP0399197A1 Process and apparatus for the low temperature separation of air |
| 11/28/1990 | EP0225911B1 Increased argon recovery from air distillation |
| 11/20/1990 | US4971607 Purification of natural or synthesis gas by condensation and solvent extraction |
| 11/20/1990 | CA1276628C Parallel wrapped tube heat exchanger |
| 11/20/1990 | CA1276541C Nitrogen rejection fractionation system for variable nitrogen content natural gas |
| 11/14/1990 | EP0397192A2 Dry, high purity nitrogen production process and apparatus |
| 11/13/1990 | US4969338 Method and apparatus of producing carbon dioxide in high yields from low concentration carbon dioxide feeds |
| 11/12/1990 | CA2016569A1 Dry, high purity nitrogen production process and system |
| 11/07/1990 | EP0395704A1 Air fractionation improvements for nitrogen production. |
| 11/07/1990 | CN1046729A Cryogenic separation of gaseous mixtures |
| 11/07/1990 | CN1010323B Process and arrangement for gaining electric energy in addition to producing molten pig iron |
| 11/06/1990 | US4968337 Air separation |
| 11/01/1990 | WO1990012631A1 A process and device for vapour condensation and heat conversion |
| 10/31/1990 | EP0395490A1 Process for the recovery of liquid hydrocarbons from a gaseous feed stream, and apparatus for carrying out this process |
| 10/30/1990 | USRE33408 Process for LPG recovery |
| 10/30/1990 | US4966612 Process for the separation of hydrocarbons |
| 10/30/1990 | US4966002 Compression, cooling, distillation |
| 10/24/1990 | EP0393029A1 Processing nitrogen-rich, hydrogen-rich, and olefin-rich gases with physical solvents. |
| 10/23/1990 | US4964901 Low-temperature separation of air using high and low pressure air feedstreams |
| 10/16/1990 | US4963339 Hydrogen and carbon dioxide coproduction |
| 10/16/1990 | US4962809 Heat exchanger |
| 10/16/1990 | US4962646 Air separation |
| 10/13/1990 | CA2014107A1 Cryogenic process for producing low-purity oxygen |
| 10/10/1990 | CN1046034A Air separation process and apparatus for high argon recovery and moderate pressure nitrogen recovery |
| 10/06/1990 | WO1990012265A1 Cryogenic separation of gaseous mixtures |
| 10/03/1990 | EP0389698A1 Method and apparatus for the production and liquefaction of gases |
| 10/03/1990 | CN1009859B Method for liquefying permanent gasflow |
| 10/02/1990 | USH825 Process for conditioning a high carbon dioxide content natural gas stream for gas sweetening |
| 10/02/1990 | CA1274764A1 Process to separate nitrogen and methane |
| 09/25/1990 | CA1274466A1 Tonnage nitrogen air separation with side reboiler condenser |