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公开(公告)号：CA2194033A1
公开(公告)日：1997-06-29
申请号：CA2194033
申请日：1996-12-27
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： SWEENEY JOSHUA BRIEN , DAY ROGER WILLIAM , LUMBA DEEPAK
IPC: B01F3/04 , B01F3/12 , B01J8/22 , B01J19/00 , B01J19/18 , B01J19/20 , C07C17/154 , C07C17/156 , C07C45/33 , C07C45/34 , C07D301/03 , C07D301/06 , B01J8/08 , C01B15/01 , C07C31/04 , C07C47/04 , C07D303/04 , C07C19/045 , C07C57/05 , C07C255/08 , C07D301/10 , C07C69/15 , C07D307/60 , C07D307/89
Abstract: Heterogeneous vapor phase oxidation and other reactions are carried out at the surface of a solid catalyst, with both gaseous reactants and the solid catalyst being dispersed in a recirculating liquid solvent. Reaction and product absorption are combined into a single processing step, with enhanced catalyst performance, and product selectivity and product yields, enhanced mass and heat transfer characteristics and reduced risk of forming explosive mixtures in the course of a particular reaction.
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公开(公告)号：ES2176819T3
公开(公告)日：2002-12-01
申请号：ES98100468
申请日：1998-01-13
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： CHENG ALAN TAT YAN , LUMBA DEEPAK
Abstract: A method to cool a reactor containing an exothermic reaction comprising; (a) subcooling a cryogenic liquid; (b) passing the liquid through at least one valve; (c) injecting it in a downwardly directed stream into a reactor vessel containing an exothermic reaction; (d) providing shielding gas around the downwardly directed stream; and (e) cooling the contents of the reactor vessel by direct heat exchange with the cryogenic liquid. The direct heat exchange vaporises the cryogenic liquid and at least a portion of the resulting vapourised fluid rises and forms a vapour barrier where the cryogenic liquid is injected into the reactor vessel. The cryogenic liquid stream is injected into the reactor vessel lower than where the shielding gas is in the reactor vessel. The process also comprises making a back up gas available to the subcooled cryogenic liquid prior to the injection of the liquid into the reaction vessel. The back up gas is at a pressure lower than the pressure of the subcooled cryogenic liquid. The cryogenic liquid and shielding gas are nitrogen.
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Patent Agency Ranking
公开(公告)号：BR9800289A
公开(公告)日：1999-08-10
申请号：BR9800289
申请日：1998-01-13
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： CHENG ALAN TAT YAN , LUMBA DEEPAK
Abstract: A method to cool a reactor containing an exothermic reaction comprising; (a) subcooling a cryogenic liquid; (b) passing the liquid through at least one valve; (c) injecting it in a downwardly directed stream into a reactor vessel containing an exothermic reaction; (d) providing shielding gas around the downwardly directed stream; and (e) cooling the contents of the reactor vessel by direct heat exchange with the cryogenic liquid. The direct heat exchange vaporises the cryogenic liquid and at least a portion of the resulting vapourised fluid rises and forms a vapour barrier where the cryogenic liquid is injected into the reactor vessel. The cryogenic liquid stream is injected into the reactor vessel lower than where the shielding gas is in the reactor vessel. The process also comprises making a back up gas available to the subcooled cryogenic liquid prior to the injection of the liquid into the reaction vessel. The back up gas is at a pressure lower than the pressure of the subcooled cryogenic liquid. The cryogenic liquid and shielding gas are nitrogen.
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公开(公告)号：DE69806977T2
公开(公告)日：2003-03-27
申请号：DE69806977
申请日：1998-01-13
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： CHENG ALAN TAT YAN , LUMBA DEEPAK
Abstract: A method to cool a reactor containing an exothermic reaction comprising; (a) subcooling a cryogenic liquid; (b) passing the liquid through at least one valve; (c) injecting it in a downwardly directed stream into a reactor vessel containing an exothermic reaction; (d) providing shielding gas around the downwardly directed stream; and (e) cooling the contents of the reactor vessel by direct heat exchange with the cryogenic liquid. The direct heat exchange vaporises the cryogenic liquid and at least a portion of the resulting vapourised fluid rises and forms a vapour barrier where the cryogenic liquid is injected into the reactor vessel. The cryogenic liquid stream is injected into the reactor vessel lower than where the shielding gas is in the reactor vessel. The process also comprises making a back up gas available to the subcooled cryogenic liquid prior to the injection of the liquid into the reaction vessel. The back up gas is at a pressure lower than the pressure of the subcooled cryogenic liquid. The cryogenic liquid and shielding gas are nitrogen.
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公开(公告)号：DE69806977D1
公开(公告)日：2002-09-12
申请号：DE69806977
申请日：1998-01-13
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： CHENG ALAN TAT YAN , LUMBA DEEPAK
Abstract: A method to cool a reactor containing an exothermic reaction comprising; (a) subcooling a cryogenic liquid; (b) passing the liquid through at least one valve; (c) injecting it in a downwardly directed stream into a reactor vessel containing an exothermic reaction; (d) providing shielding gas around the downwardly directed stream; and (e) cooling the contents of the reactor vessel by direct heat exchange with the cryogenic liquid. The direct heat exchange vaporises the cryogenic liquid and at least a portion of the resulting vapourised fluid rises and forms a vapour barrier where the cryogenic liquid is injected into the reactor vessel. The cryogenic liquid stream is injected into the reactor vessel lower than where the shielding gas is in the reactor vessel. The process also comprises making a back up gas available to the subcooled cryogenic liquid prior to the injection of the liquid into the reaction vessel. The back up gas is at a pressure lower than the pressure of the subcooled cryogenic liquid. The cryogenic liquid and shielding gas are nitrogen.
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公开(公告)号：BR9606185A
公开(公告)日：1998-08-18
申请号：BR9606185
申请日：1996-12-27
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： LUMBA DEEPAK , DAY ROGER WILLIAM , SWEENEY JOSHUA BRIEN
IPC: B01F3/04 , B01F3/12 , B01J8/22 , B01J19/00 , B01J19/18 , B01J19/20 , C07C17/154 , C07C17/156 , C07C45/33 , C07C45/34 , C07D301/03 , C07D301/06 , B01F3/00
Abstract: Heterogeneous vapor phase oxidation and other reactions are carried out at the surface of a solid catalyst (2), with both gaseous reactants and the solid catalyst (2) being dispersed in a recirculating liquid solvent. Reaction and product absorption are combined into a single processing step, with enhanced catalyst performance, and product selectivity and product yields, enhanced mass and heat transfer characteristics and reduced risk of forming explosive mixtures in the course of a particular reaction.
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公开(公告)号：BR9603611A
公开(公告)日：1998-05-19
申请号：BR9603611
申请日：1996-08-30
Applicant: PRAXAIR TECHNOLOGY INC
Inventor： LUMBA DEEPAK , CHENG ALAN TAT YAN
Abstract: A system for the recovery of volatile compounds comprising a direct contact condenser and an indirect heat exchanger, wherein the heat exchanger is driven by cryogenic fluid, and a heat exchange fluid, having the same composition as the volatile compound, recirculates between the condenser and the heat exchanger.
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