| Patents for C01B 23 - Noble gases; Compounds thereof (1,372) |
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| 07/06/1993 | US5224350 Using nitrogen rejection units with membrane units and pressure swing absorption |
| 06/03/1993 | DE4139678A1 Xenon recovery from air fractionation bottom liq. - by evapn. and passage through adsorbent-filled transportable container for removing xenon |
| 05/19/1993 | EP0521849A4 Process, composition, and apparatus for purifying inert gases to remove lewis acid and oxidant impurities therefrom |
| 04/20/1993 | US5204075 Process for the purification of the inert gases |
| 04/13/1993 | CA2049646C Enhanced recovery of argon from cryogenic air separation cycles |
| 03/16/1993 | US5194233 Process for purification of rare gas |
| 02/24/1993 | EP0528331A1 Cryogenic rectification system for enhanced argon production |
| 02/09/1993 | US5185139 Removal of particulate matter and trace contaminatnts; separation; liquifying carbon dioxide; distillation |
| 01/13/1993 | EP0521849A1 Process, composition, and apparatus for purifying inert gases to remove lewis acid and oxidant impurities therefrom. |
| 01/12/1993 | CA1312449C Inert gas purifier for bulk nitrogen without the use of hydrogen or other reducing gases |
| 12/02/1992 | EP0516401A1 Purification of gas streams |
| 11/19/1992 | EP0514163A2 Method of purifying argon through cryogenic adsorption |
| 11/15/1992 | CA2068157A1 Method for purifying argon through cryogenic adsorption |
| 11/11/1992 | CN1066004A Helium extracted from methanol tail-gas and synthetic ammonia purge gas by metallic hydride method and simultaneously obtaining high-purity hydrogen |
| 11/10/1992 | US5161380 Feed of nitrogen, oxygen and argon |
| 11/03/1992 | US5159816 Method of purifying argon through cryogenic adsorption |
| 10/21/1992 | EP0509871A1 Method and apparatus for producing argon |
| 10/21/1992 | CN1065438A Argon purification system |
| 10/17/1992 | CA2064505A1 Argon production assembly and process thereof |
| 09/29/1992 | US5151395 Bulk gas sorption and apparatus, gas containment/treatment system comprising same, and sorbent composition therefor |
| 09/29/1992 | US5150604 Method for determining the end of useful life of an inert gas purifier and apparatus therefore |
| 09/02/1992 | EP0501391A1 Argon purification system |
| 08/26/1992 | CA2061761A1 Argon purification system |
| 08/06/1992 | CA2060222A1 Cryogenic process for the production of methane-free, krypton/xenon product |
| 08/06/1992 | CA2060221A1 Cryogenic process for the production of an oxygen-free and methane-free, krypton/xenon product |
| 08/06/1992 | CA2060220A1 Cryogenic production of krypton and xenon from air |
| 08/05/1992 | EP0497003A2 Use of helium and argon diluent gases in modification of carbon molecular sieves |
| 07/29/1992 | CN1063053A Three-stage membrane gas spearation process and system |
| 07/16/1992 | DE4100933A1 Helium purificn. plant using inert diatomaceous earth adsorber filters - for safer operation in presence of liquid oxygen@ residues |
| 07/14/1992 | CA1304910C Method for dehydrating hydrogen fluoride |
| 07/04/1992 | CA2058521A1 Use of helium and argon diluent gases in modification of carbon molecular sieves |
| 06/30/1992 | US5125934 Pressure swing adsorption |
| 06/17/1992 | EP0490322A1 Three-stage membrane gas separation process and system |
| 06/16/1992 | US5122173 Cryogenic production of krypton and xenon from air |
| 06/11/1992 | CA2057253A1 Three stage membrane gas separation process and system |
| 05/19/1992 | US5114449 Enhanced recovery of argon from cryogenic air separation cycles |
| 05/12/1992 | US5112590 Separation of gas mixtures including hydrogen |
| 05/12/1992 | CA1300344C Superpurifier for argon gas and process for purifying argon gas |
| 05/05/1992 | CA1300040C Method and apparatus for gaz mixture adsorption separation |
| 04/21/1992 | US5106399 Argon purification system |
| 04/07/1992 | US5102432 Third stage permeate recycled to second stage; membrane surface area distributed between stages; high purity product |
| 03/31/1992 | US5100635 Multistage, oxidation, reduction, cryogenic distillation, purification |
| 03/31/1992 | US5100447 Pressure swing adsorption system |
| 03/24/1992 | US5098880 Forming carbon on a molecular sieve support to use as an adsorbent for gases such as nitrogen and oxygen |
| 03/18/1992 | EP0475312A2 Process for purification of rare gas |
| 03/11/1992 | EP0474106A2 Process for making modified carbon molecular sieves for gas separation |
| 03/11/1992 | CN1059294A Carbon dioxide production from combustion exhaust gases with nitrogen and argon by-product recovery |
| 03/04/1992 | EP0473078A1 Enhanced recovery of argon from cryogenic air separation cycles |
| 02/27/1992 | DE4125538A1 Helium extn. from gas contg. hydrogen by pressure swing adsorption - and catalytic removal of hydrogen avoiding use of cryogenic temp. |
| 02/24/1992 | CA2048263A1 Process for helium purification |
| 02/18/1992 | US5089048 Process for helium enrichment |
| 02/18/1992 | CA1295815C Process and apparatus for performing catalytic reactions |
| 02/05/1992 | EP0469781A2 Separation of carbon dioxide and nitrogen from combustion exhaust gas with nitrogen and argon by-product recovery |
| 02/04/1992 | US5086033 Pyrlysis of carbon containing compound to narrow pore size by deposition |
| 01/28/1992 | US5084247 Apparatus for performing catalytic reactions |
| 01/14/1992 | US5080694 Process for helium recovery |
| 11/26/1991 | US5067976 Cryogenic process for the production of an oxygen-free and methane-free, krypton/xenon product |
| 11/12/1991 | US5064446 Method of preparing high purity light gas by multiple-step gas separation |
| 11/12/1991 | US5063746 Cryogenic process for the production of methane-free, krypton/xenon product |
| 10/22/1991 | CA1291023C Argon and nitrogen coproduction process |
| 10/17/1991 | WO1991015868A1 Process, composition, and apparatus for purifying inert gases to remove lewis acid and oxidant impurities therefrom |
| 09/19/1991 | WO1991013679A1 Bulk gas sorption composition and apparatus |
| 09/04/1991 | EP0444422A1 Production of high purity argon |
| 09/04/1991 | CN1054232A End purifying device suitable for n (a, he) and refining route |
| 08/13/1991 | US5039500 Process for producing xenon |
| 08/06/1991 | US5037624 Composition, apparatus, and process, for sorption of gaseous compounds of group II-VII elements |
| 08/03/1991 | CA2035052A1 Production of high purity argon |
| 07/30/1991 | US5035726 Process for removing oxygen from crude argon |
| 07/24/1991 | EP0438036A2 Method for determining the end of useful life of an inert gas purifier and apparatus therefor |
| 07/16/1991 | US5032152 Modified molecular sieve |
| 06/25/1991 | US5026532 Batch processing, heating mixture of aluminum, sodium and potassium hydroxide, tetramethylammonium hydroxide and silica source |
| 06/25/1991 | CA1285209C Process for the production of argon |
| 05/14/1991 | US5016254 Ammonia-helium complex, neon |
| 05/14/1991 | US5015411 Process, composition, and apparatus for purifying inert gases to remove Lewis acid and oxidant impurities therefrom |
| 05/14/1991 | US5015272 Separation of hydrogen and/or helium, adsorption and desorption by depressurization, countercurrent flow, purging |
| 05/14/1991 | US5015271 Separation of gas mixtures by vacuum swing adsorption (VSA) in a two-adsorber system |
| 04/17/1991 | EP0422559A1 Rare gas purifying method |
| 03/13/1991 | EP0416287A2 Improved method for forming local interconnects using selective anisotropy |
| 02/26/1991 | US4996030 Removing toxic arsine, phosphine, diborane and hydrogen selenide using cupric oxide, manganese dioxide and silicon, aluminum or zinc oxides |
| 02/07/1991 | DE3925296A1 Trace impurity removal from inert or noble gas - using successive packings of metal, esp. calcium, and hydride storage material |
| 01/29/1991 | US4988431 Process for performing catalytic reactions |
| 01/23/1991 | EP0409135A1 Improved chabazite for gas separation |
| 01/16/1991 | CN1011200B Technological process equipment for purifying xenon |
| 01/08/1991 | US4983363 Apparatus for purifying arsine, phosphine, ammonia, and inert gases to remove Lewis acid and oxidant impurities therefrom |
| 01/08/1991 | US4983194 Production of high purity argon |
| 01/01/1991 | US4981499 Process and plant for separating a gaseous mixture by adsorption |
| 12/19/1990 | CN1010830B Process for separating gaseous mixture by adsorption |
| 12/11/1990 | US4976933 Hydrogen stream purification |
| 10/10/1990 | EP0391351A2 Process for the preparation of an improved chabazite for the purification of bulk gases |
| 10/10/1990 | EP0391350A2 The purification of bulk gases using chabazite adsorbents |
| 10/06/1990 | CA2013530A1 Process for the purification of bulk gases using chabazite adsorbents |
| 10/06/1990 | CA2013529A1 Process for the preparation of an improved chabazite for the purification of bulk gases |
| 09/18/1990 | US4957590 Method for forming local interconnects using selective anisotropy |
| 09/18/1990 | CA1274168A1 Argon recovery from hydrogen depleted ammonia plant purge gas utilizing a combination of cryogenic and non-cryogenic separating means |
| 09/11/1990 | CA1273865A1 Argon recovery from ammonia plant purge gas utilizing a combination of cryogenic and non-cryogenic separating means |
| 08/29/1990 | CN1009355B Generation process and apparatus of insert gas |
| 08/21/1990 | US4950419 Process, composition, and apparatus for purifying inert gases to remove lewis acid and oxidant impurities therefrom |
| 08/01/1990 | CN1044268A Molecular sieve adsorbent for removing trace kr, nitrogen oxides from xe |
| 07/26/1990 | WO1990007971A1 Sorption of gaseous compounds of groups ii-vii elements |
| 07/24/1990 | US4943304 Process for the purification of bulk gases using chabazite adsorbents |