| Patent Number |
Title Of Patent |
Date Issued |
| 6987080 |
Ethylene oxide catalyst carrier preparation |
January 17, 2006 |
| The invention relates to the aqua-thermal treatment of an ethylene oxide catalyst carrier and to a silver catalyst prepared therefrom. |
| 6858561 |
Phosphorus/vanadium catalyst preparation |
February 22, 2005 |
| A process for preparing a catalyst for maleic anhydride production wherein a +5 vanadium compound such as V.sub.2 O.sub.5, an anhydrous phosphoric acid, and optionally promoters are admixed in an organic alcohol solvent, the admixture is rapidly brought to reflux and thereafter refluxed |
| 6750173 |
Ethylene oxide catalyst |
June 15, 2004 |
| The invention relates to an ethylene oxide catalyst comprised of silver deposited on an alumina carrier which has been treated to remove at least 25% of the surface sodium ions and replace the removed sodium ions with up to 10 ppm of lithium ions and to the preparation thereof. |
| 6533843 |
Two stage flash for hydrocarbon removal |
March 18, 2003 |
| Scrubber liquid from an ethylene oxide process rich in bicarbonate and dissolved ethylene is flashed in two stages to separate ethylene containing vapor from bicarbonate rich solution reduced in ethylene content. |
| 6452027 |
Heat recovery procedure |
September 17, 2002 |
| The present invention provides a process treating the cycle gas from an ethylene oxide reactor to avoid heat losses in a carbonate scrubbing system as well as glycol formation in the carbonate scrubbing and catalyst contamination upon cycle gas recycle. |
| 6242655 |
Glycol purification |
June 5, 2001 |
| High purity ethylene glycol containing 2000 ppm or less aldehyde is contacted with a solid strong acid cation exchange resin and an ethylene glycol product reduced in aldehydes content is recovered. |
| 6194587 |
Production of maleic anhydride |
February 27, 2001 |
| N-butane and molecular oxygen are reacted in a first reactor to form maleic anhydride, the produced maleic anhydride is scrubbed to separate maleic anhydride values, n-butane is added to the scrubber gases and these are reacted in a second reactor to form additional maleic anhydride. |
| 6187973 |
Glycol purification |
February 13, 2001 |
| Aqueous ethylene glycol solution containing aldehydes such as formaldehyde, acetaldehyde and the like is contacted with a solid bisulfite treated strong base anion exchange resin and a solution reduced in aldehydes content is separated. |
| 6107234 |
Phosphorus/vanadium maleic anhydride catalyst preparation |
August 22, 2000 |
| A VPO catalyst precursor having the formula (VO)HPO.sub.4 aH.sub.2 OM.sub.m P.sub.p O.sub.y wherein M is at least one promoter element selected from the group consisting of elements from Groups IA, IB, IIA, IIIA, IIIB, IVA, IVB, VA, VB, VIA, VIB, and VIIIA of the Periodic Table of the El |
| 5945551 |
Ethylene oxide catalyst |
August 31, 1999 |
| A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of an alkali metal component, a sulfur component, a germanium or tin component, and a fluorine component the catalyst being essentially free of rhenium and transition metal |
| 5922637 |
Phosphorus/vanadium catalyst preparation |
July 13, 1999 |
| The invention provides an improved method for the production of vanadium/phosphorous mixed oxide catalysts, a vanadium +5 solid compound first being digested in an organic solvent at anhydrous conditions, water then being added and the resulting aqueous mixture containing suspended s |
| 5905053 |
Ethylene oxide catalyst |
May 18, 1999 |
| A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of an alkali metal component, a sulfur component, a fluorine component, and a pnictogen component from the group phosphorus, bismuth and antimony; the catalyst is essential |
| 5885919 |
Phosphorus/vanadium catalyst preparation |
March 23, 1999 |
| The invention provides an improved method for the production of vanadium/phosphorous mixed oxide catalysts, using an organic solvent system and an additive such as dimethyl sulfoxide, the catalyst having special utility in the production of maleic anhydride. |
| 5854167 |
Ethylene oxide catalyst |
December 29, 1998 |
| A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of an alkali metal component, a sulfur component, a germanium or tin component, and a fluorine component the catalyst being essentially free of rhenium and transition metal |
| 5780656 |
Ethylene oxide catalyst and process |
July 14, 1998 |
| A silver catalyst for ethylene oxidation to ethylene oxide is provided containing a promoter combination consisting of an alkali metal component, a sulfur component, and a fluorine component, the catalyst being essentially free of rhenium and transition metal components. |
| 5703001 |
Promoted silver catalyst |
December 30, 1997 |
| A rhenium free supported silver catalyst for ethylene oxidation to ethylene oxide is provided containing an alkali metal promoter component and a Group 4b component in which the Group 4b component is added as a compound where the Group 4b compound is the cation. |
| 5691269 |
Process for preparing silver catalyst |
November 25, 1997 |
| An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of a neo acid; subjecting the impregnated support to a low temperature activation by heating at a temperature in the range of 250.degree. C. to |
| 5646087 |
Promoted silver acatalyst preparation |
July 8, 1997 |
| A silver catalyst for ethylene oxidation to ethylene oxide is prepared by impregnating an inert support with a silver/amine solution as well as with various promoters and calcining the impregnated support at 300.degree.-500.degree. C., the catalyst being maintained under an inert atm |
| 5602070 |
Process for preparing silver catalyst |
February 11, 1997 |
| An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of an acid; subjecting the impregnated support to a multi-stage activation by heating and post impregnating the support with an cesium carbonate or |
| 5525740 |
Process for preparing silver catalyst and process of using same to produce ethylene oxide |
June 11, 1996 |
| An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of a neo acid; subjecting the impregnated support to a low temperature activation by heating at a temperature in the range of 250.degree. C. to |
| 5521134 |
Method for regenerating vanadium/phosphorus oxidation catalysts |
May 28, 1996 |
| A method of regenerating V/P/O oxidation catalyst used for the partial oxidation of n-butane which comprises terminating the n-butane feed and contacting the catalyst with an oxygen containing gas, such as air for a sufficient period of time to regenerate the catalyst such that when the |
| 5504052 |
Silver catalyst preparation |
April 2, 1996 |
| A silver catalyst for ethylene oxidation to ethylene oxide is prepared by impregnating an inert support with a silver/amine solution and calcining the impregnated support at 300.degree.-5000.degree. C., the catalyst being maintained under an inert atmosphere at temperatures of 250.degree |
| 5480853 |
Phosphorus/vanadium catalyst preparation |
January 2, 1996 |
| A vanadium/phosphorus mixed oxide catalyst containing not more than 0.2 wt % chloride is produced by drying chloride containing catalyst precursor at 100.degree.-180.degree. C., calcining the dried precursor, preferably under nitrogen, at 200.degree.-300.degree. C. and activating the cal |
| 5446000 |
Treatment for virgin phosphorous/vanadium oxidation catalysts |
August 29, 1995 |
| A method of removing chloride from phosphorus/vanadium/oxygen mixed oxide oxidation catalysts comprising treating a chloride containing catalyst comprising phosphorus, vanadium and oxygen with a stream of gas comprising oxygen, steam and an inert gas at flow rate and temperature and for |
| 5444034 |
Process for preparing silver and alkali catalyst |
August 22, 1995 |
| An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of an acid; subjecting the impregnated support to a multi-stage activation in an atmosphere containing less oxygen than air by heating at a first |
| 5374748 |
Process for preparing silver catalyst for ethylene epoxidation |
December 20, 1994 |
| An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a porous support with a silver salt of an acid; subjecting the impregnated support to a multi-stage activation in an atmosphere containing less oxygen than air by heating at a first |
| 5360916 |
Two stage butane haleic anhydride process |
November 1, 1994 |
| Butane is oxidized with molecular oxygen in a dilute state by bringing a mixture of vaporized butane and air of controlled butane content into the presence of a contact vanadium-phosphorus-oxygen catalyst in a first oxidation zone under controlled pressure and temperature conditions, |
| 5348927 |
Treatment for virgin phosphorous/vanadium oxidation catalysts |
September 20, 1994 |
| A method of removing chloride from phosphorus/vanadium/oxygen mixed oxide oxidation catalysts comprising treating a chloride containing catalyst comprising phosphorus, vanadium and oxygen with a stream of gas comprising oxygen, steam and an inert gas at flow rate and temperature and for |
| 5342973 |
Process for preparing silver salt solutions |
August 30, 1994 |
| A silver salt solution suitable for depositing silver on a support in the preparation of silver catalysts is made by reacting a silver compound with a neo-acid, in a hydrocarbon solvent. The reaction is completed under reflux conditions, thereby removing water formed by the reaction and |
| 5336656 |
Catalyst for production of nitric acid by oxidation of ammonia |
August 9, 1994 |
| Reticulated ceramic or metal substrate coated with cobalt compounds, noble metals or mixtures thereof, are superior catalysts for the oxidation of ammonia to produce nitric oxide. |
| 5296436 |
Phosphorous/vanadium oxidation catalyst |
March 22, 1994 |
| An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc, lithium and molybdenum mixed oxides which comprises adding the molybdenum as a compound which is dissolved in a solvent during the manufacture of the cata |
| 5280003 |
Static condition process for the preparation of phosphorous/vanadium oxidation catalyst |
January 18, 1994 |
| An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc, lithium and molybdenum mixed oxides which comprises carrying out the crystallization step under static conditions which allows for more uniform conditions for |
| 5262548 |
Phosphorous/vanadium oxidation catalyst |
November 16, 1993 |
| An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc and lithium mixed oxides which comprises adding a molybdenum compound modifier in an amount of from about 0.005 to 0.025/1 Mo/V to the catalyst during the dige |
| 5256387 |
Catalyst for the production of nitric acid by oxidation of ammonia |
October 26, 1993 |
| Reticulated ceramic or metal substrate coated with Cobalt compounds, noble metals or mixtures thereof are superior catalysts for the oxidation of ammonia to produce nitric oxide. |
| 5242882 |
Catalyst for the production of nitric acid by oxidation of ammonia |
September 7, 1993 |
| Reticulated ceramic or metal substrate coated with Cobalt compounds, noble metals or mixtures thereof are superior catalysts for the oxidation of ammonia to produce nitric oxide. |
| 5217939 |
Catalyst for the prduction of nitric acid by oxidation of ammonia |
June 8, 1993 |
| Reticulated ceramic or metal substrate coated with Cobalt compounds, noble metals or mixtures thereof are superior catalysts for the oxidation of ammonia to produce nitric oxide. |
| 5158923 |
Phosphorous/vanadium oxidation catalyst |
October 27, 1992 |
| An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc and lithium mixed oxides which comprises adding a molybdenum compound modifier in an amount of from about 0.005 to 0.025/1 Mo/V to the catalyst during the dige |
| 5138073 |
Preparation of alkylene carbonates |
August 11, 1992 |
| Alkylene carbonates, particularly ethylene carbonate, are prepared by the reaction of an alkylene oxide with carbon dioxide in the presence of a catalyst at temperatures in the region of the critical temperature of carbon dioxide, preferably 25.degree.-70.degree. C. and at autogenerated |
| 5070060 |
Phosphorous/vanadium oxidation catalyst |
December 3, 1991 |
| An improvement in the oxidation catalyst used for the partial oxidation of n-butane and containing vanadium and phosphorus, zinc and lithium mixed oxides which comprises adding a molybdenum compound modifier in an amount of from about 0.0005 to 0.025/1 Mo/V to the catalyst during the dig |
| 5023345 |
Preparation of alkylene carbonates |
June 11, 1991 |
| Alkylene carbonates, particularly ethylene carbonate, are prepared by the reaction of an alkylene oxide with carbon dioxide in the presence of a catalyst at temperatures in the region of the critical temperature of carbon dioxide, preferably 25.degree.-70.degree. C. and at autogenerated |
| 5008413 |
Catalyst for oxidation of ethylene to ethylene oxide |
April 16, 1991 |
| An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a support with a silver salt prepared by reacting a silver compound with a neo-acid, in a hydrocarbon solvent with the reaction completed under reflux conditions; drying and activating |
| 4931571 |
Process for preparing alkylene carbonates from alkylene oxides |
June 5, 1990 |
| An alkylene oxide, e.g. ethylene oxide, is prepared from the corresponding alkylene carbonate, e.g. ethylene carbonate, in the presence of an effective amount of a quaternary arsonium halide. The quaternary arsonium halides are also effective catalysts for the reverse reaction, that is, |
| 4921681 |
Ethylene oxide reactor |
May 1, 1990 |
| Improved performance is obtained in a multi-tube reactor for oxidation of ethylene to ethylene oxide by providing a distribution zone for the coolant located downstream of the catalyst and a contiguous cooling zone. The effluent gases from the oxidation are cooled in the cooling zone by |
| 4904807 |
Selective extraction of argon from ethylene oxide recycle stream |
February 27, 1990 |
| The invention relates to an improved process for production of ethylene oxide which minimizes unreacted ethylene losses through the use of semi-permeable membrane units, thereby allowing an effective, selective removal of argon from the process cycle gas, without significant ethylene |
| 4897376 |
Process for preparing a catalyst for oxidation of ethylene to ethylene oxide |
January 30, 1990 |
| An improved silver catalyst for the oxidation of ethylene with molecular oxygen is made by impregnating a support with a silver salt prepared by reacting a silver compound with a neo-acid, in a hydrocarbon solvent with the reaction completed under reflux conditions; drying and activating |
| 4879396 |
Selective extraction of CO.sub.2 and argon from ethylene oxide recycle system |
November 7, 1989 |
| An improved process is disclosed for producing ethylene oxide; the process utilizing suitable semipermeable membrane units to selectively remove desired amounts of both carbon dioxide and argon diluents from the reaction recycle gas. The utilization of such a process makes possible to |
| 4864042 |
Process for preparing silver catalysts |
September 5, 1989 |
| A supported silver catalyst for the oxidation of ethylene to ethylene oxide with molecular oxygen is made by impregnating a support with a hydrocarbon solution of a silver salt of a neo-acid having 7 or more carbon atoms, substantially free of water and said neo-acid. Preferably, the hyd |
| 4851555 |
Process for preparing alkylene oxides from alkylene carbonates |
July 25, 1989 |
| An alkylene oxide, e.g. ethylene oxide, is prepared from the corresponding alkylene carbonate, e.g. ethylene carbonate, in the presence of an effective amount of a quaternary arsonium halide. The quaternary arsonium halides are also effective catalysts for the reverse reaction, that is, |
| 4841080 |
Process for the oxidation of ethylene to ethylene oxide |
June 20, 1989 |
| A supported silver catalyst for the oxidation of ethylene with molecular oxygen to ethylene oxide is made by depositing silver on a support capable of selectively adsorbing alkali metals, activating the silver under conditions chosen to provide the optimum selectivity of ethylene oxide a |
| 4841072 |
Preparation of alkylene carbonates |
June 20, 1989 |
| Alkylene carbonates, particularly ethylene carbonate, are prepared by the reaction of an alkylene oxide with carbon dioxide in the presence of a catalyst at temperatures in the region of the critical temperature of carbon dioxide, preferably 25.degree.-70.degree. C. and at autogenerated |
