| Patent Number |
Title Of Patent |
Date Issued |
| 5220797 |
Argon recovery from argon-oxygen-decarburization process waste gases |
June 22, 1993 |
| The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, carbon dioxide, nitrogen, and hydrogen which comprises the steps of (a) purifying the feed mixture to remove contaminants, (b) compressing the purified feed mixture t |
| 5179215 |
Process for the production of petrochemicals |
January 12, 1993 |
| An improved process is provided for the production of a petrochemical by the vapor phase reaction of a hydrocarbon with an oxygen-containing gas in the presence of a suitable catalyst to produce a flammable gaseous product stream comprising the desired petrochemical, unreacted hydrocarbo |
| 5177225 |
Process for the production of alkylene oxide |
January 5, 1993 |
| Disclosed is a process for the production of an alkylene oxide in which an alkene, and an oxygen containing gas are reacted in the presence of a flame suppressor under conditions of low alkene conversion and high alkylene oxide selectivity in which unreacted alkene is recycled to the |
| 5125934 |
Argon recovery from argon-oxygen-decarburization process waste gases |
June 30, 1992 |
| The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, carbon dioxide, nitrogen, and hydrogen which comprises the steps of (a) purifying the feed mixture to remove contaminants, (b) compressing the purified feed mixture t |
| 5100447 |
Argon recovery from partial oxidation based ammonia plant purge gases |
March 31, 1992 |
| The present invention is directed to a method for recovering argon from a feed mixture comprising argon, carbon monoxide, methane, hydrogen, and nitrogen which comprises the steps of (a) passing the feed mixture through a pressure swing adsorption system to remove carbon monoxide, methan |
| 5043461 |
Process for the production of oxides |
August 27, 1991 |
| An improved process for the production of oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, in the presence of a suitable catalyst. An alkane, e.g. propane, is converted to an alkene in a catalytic dehydrogenator. Th |
| 5015756 |
Process for the production of nitriles |
May 14, 1991 |
| An improved process is provided for the production of nitriles from hydrocarbons by reaction with an oxygen-containing gas comprising oxygen, air or a gas enriched in oxygen relative to air and ammonia in the presence of a suitable catalyst. In the process, a selective separator prov |
| 5008414 |
Process for the production of oxides |
April 16, 1991 |
| An improved process is provided for the production of oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter in the presence of an oxidation catalyst. An alkane, e.g. propane, is converted to an alkene in a catalytic d |
| 5008412 |
Process for the production of oxides |
April 16, 1991 |
| An improved process is provided for the production of oxides from alkanes by reaction with oxygen, air or a gas enriched in oxygen relative to an air in the presence of an oxidation catalyst. An alkane, e.g. propane, is converted to an alkene in a multistage dehydrogenator. The product s |
| 4990632 |
Process for the production of oxides |
February 5, 1991 |
| An improved process is provided for the production of oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, in the presence of an oxidation catalyst. An alkane, e.g. propane, is converted to an alkene in a dehydrogen |
| 4987239 |
Process for the production of anhydrides |
January 22, 1991 |
| An improved process is provided for the production of anhydrides from hydrocarbons by reaction with an oxygen-containing gas comprising oxygen, air or a gas enriched in oxygen relative to air, in the presence of a suitable catalyst. In the process, a selective separator provides recycle |
| 4969338 |
Method and apparatus of producing carbon dioxide in high yields from low concentration carbon di |
November 13, 1990 |
| A process for producing substantially pure liquid carbon dioxide from a carbon dioxide feed containing about 35 to about 98% by volume of carbon dioxide wherein a waste stream containing carbon dioxide is separated from contaminants in a pressure swing adsorption apparatus and then recyc |
| 4952223 |
Method and apparatus of producing carbon dioxide in high yields from low concentration carbon di |
August 28, 1990 |
| A process for producing substantially pure liquid carbon dioxide from a carbon dioxide feed containing about 35 to about 98% by volume of carbon dioxide wherein a waste stream containing carbon dioxide is separated from contaminants in a pressure swing adsorption apparatus and then recyc |
| 4943650 |
Process for the production of nitriles |
July 24, 1990 |
| An improved process is provided for the production of nitriles and oxides from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, and ammonia where a nitrile is desired, in the presence of a suitable catalyst. An alkane, e.g. pro |
| 4870201 |
Process for the production of nitriles |
September 26, 1989 |
| An improved process is provided for the production of nitriles from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, and ammonia in the presence of an ammoxidation catalyst. An alkane, e.g., propane, is converted to an alkene |
| 4868330 |
Process for the production of nitriles |
September 19, 1989 |
| An improved process is provided for the production of nitriles from hydrocarbons by reaction with an oxygen-containing gas comprising oxygen, air or a gas enriched in oxygen relative to air and ammonia in the presence of a suitable catalyst. In the process, a selective separator prov |
| 4861361 |
Argon and nitrogen coproduction process |
August 29, 1989 |
| Argon and nitrogen are separated from a gaseous stream containing them in combination with oxygen in a three-step process comprising introducing the gaseous stream under pressure to a noncryogenic separator to produce therein a stream enriched in nitrogen and argon, introducing said stre |
| 4849538 |
Process for the production of nitriles |
July 18, 1989 |
| An improved process is provided for the production of nitriles from hydrocarbons by reaction with oxygen, air or a gas enriched in oxygen relative to air, preferably the latter, and ammonia in the presence of an ammoxidation catalyst. An alkane, e.g. propane, is converted to an alkene |
| 4849537 |
Process for the production of nitriles |
July 18, 1989 |
| An improved process is provided for the production of nitriles from hydrocarbons by reaction with oxygen, air or gas-enriched in relative to an air, and ammonia, in the presence of an ammoxidation catalyst. An alkane, e.g. propane, is converted to an alkene in a multistage dehydrogen |
| 4816039 |
PSA multicomponent separation utilizing tank equalization |
March 28, 1989 |
| The inclusion of one or more tanks in a two-bed pressure swing adsorption system provides for a further reduction in the pressure from which each bed is vented. According to the invention, following a bed pressure equalization step, the bed which is to undergo regeneration is equalized |
| 4765804 |
PSA process and apparatus employing gaseous diffusion barriers |
August 23, 1988 |
| There is disclosed an improved PSA process and apparatus for gas enrichment wherein the pressure levels of the vent gas stream and/or product stream are used to drive gaseous diffusion cells to produce a feed gas stream and/or a purge gas stream to be used in the pressure swing adsorptio |
| 4758252 |
Hydrostatic method employing PSA vent gas pressure for vacuum regeneration |
July 19, 1988 |
| This invention relates to an energy efficient method of vacuum regenerating an adsorbent bed. In a typical process, the adsorbent bed undergoes an adsorption step, a vent step, and a vacuum purge step. According to the present invention, the energy of the usually discarded vent gas is us |
| 4752311 |
Argon recovery from ammonia plant purge gas utilizing a combination of cryogenic and non-cryogen |
June 21, 1988 |
| An improved high yield process is disclosed for argon recovery from an ammonia synthesis plant purge gas comprising hydrogen, nitrogen, argon, ammonia, and methane. In one embodiment of the present invention, this purge gas is subjected to the following steps:(i) Separation of ammonia at |
| 4750925 |
Argon recovery from hydrogen depleted ammonia plant purge gas utilizing a combination of cryogen |
June 14, 1988 |
| An improved process is provided for the recovery of argon from a gas mixture comprising hydrogen, nitrogen, methane and argon. An example of such a gas mixture is purge gas from an ammonia synthesis plant which has been subjected to the conventional steps of ammonia absorption and a |
| 4732580 |
Argon and nitrogen coproduction process |
March 22, 1988 |
| Argon and nitrogen are produced in a basic two step process. In a first step, oxygen is removed from a compressed air feed using low temperature PSA (pressure swing adsorption). In the second step, argon and nitrogen mixture is separated by cryogenic distillation. The process yields crud |
| 4689062 |
Argon recovery from ammonia plant purge gas utilizing a combination of cryogenic and non-cryogen |
August 25, 1987 |
| An improved process is disclosed for argon recovery from an ammonia synthesis plant purge gas comprising hydrogen, nitrogen, argon, ammonia, and methane. In one embodiment of the present invention, this purge gas is subjected to the following steps:(i) Separation of ammonia at high press |
| 4687498 |
Argon recovery from hydrogen depleted ammonia plant purge gas utilizing a combination of cryogen |
August 18, 1987 |
| An improved process is disclosed for argon recovery from an ammonia synthesis plant purge gas stream comprising hydrogen, nitrogen, argon, methane, and ammonia. This purge gas is conventionally subjected to ammonia absorption and a first membrane separation of hydrogen for recycle to |
