公开(公告)号：CA2243872C

公开(公告)日：2002-05-21

申请号：CA2243872

申请日：1998-07-22

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN ,  PAPAVASSILIOU VASILIS ,  DAY ROGER WILLIAM

IPC: C07C67/055 ,  C07D301/08 ,  C07D303/04

Abstract: This invention is directed to a method for producing ethylene oxide comprising feeding ethylene, high purity oxygen and a ballast gas with a recycle gas in a catalyst filled reactor to form a gaseous mixture; passing the gaseous mixture from the reactor to a recovery unit to selectively separate ethylene oxide and carbon dioxide containing gas; passing at least a portion of the carbon dioxide containing gas to a stripping unit to selectively separate carbon dioxide and a waste gas; passing at least a portion of the waste gas to purge and another portion for recycling as the recycle gas; and recovering ethylene oxide from the recovery unit.

公开(公告)号：DE69801616D1

公开(公告)日：2001-10-18

申请号：DE69801616

申请日：1998-06-18

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: B01F23/10 ,  B01J4/00 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07B61/00 ,  C07C51/215 ,  C07D307/60 ,  C07C51/25 ,  C07C51/21 ,  C07C57/145 ,  B01F5/04

Abstract: A system provides an oxygen-bearing gas and gaseous reactant stream to a fluidized bed reactor using a sparger to entrain the oxygen-bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and introduces the reactant gas stream and entrained oxygen-bearing gas directly into contact with the fluidized bed. A controller controls and maintains both the amount of oxygen-bearing gas and the gaseous reactant above an upper flammability limit, preferably with a safety margin of at least 10%.

公开(公告)号：AT205467T

公开(公告)日：2001-09-15

申请号：AT98111263

申请日：1998-06-18

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: C07D307/60 ,  B01F23/10 ,  B01J4/00 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07B61/00 ,  C07C51/215 ,  C07C51/25 ,  C07C51/21 ,  C07C57/145

Abstract: A system provides an oxygen-bearing gas and gaseous reactant stream to a fluidized bed reactor using a sparger to entrain the oxygen-bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and introduces the reactant gas stream and entrained oxygen-bearing gas directly into contact with the fluidized bed. A controller controls and maintains both the amount of oxygen-bearing gas and the gaseous reactant above an upper flammability limit, preferably with a safety margin of at least 10%.

公开(公告)号：ID23719A

公开(公告)日：2000-05-11

申请号：ID990784

申请日：1999-08-12

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  FRANCIS ARTHUR WELLINGTON JR ,  WAGNER MATTHEW LINCOLN ,  LEGER CHRISTOPHER BRIAN

IPC: B01F23/10 ,  B01J3/00 ,  B01J3/02 ,  B01J12/00 ,  B01J19/00 ,  B01J19/26 ,  C01B32/40

Abstract: The invention comprises a reactor having a source of a first hot reactant gas, a mixing chamber in which said first hot reactant gas mixes with a second reactant gas to form a reactant gas mixture, but wherein substantially no reaction takes place and a reaction zone wherein said mixture undergoes vapor phase reaction. A process for using the reactor is also disclosed.

公开(公告)号：ID20620A

公开(公告)日：1999-01-28

申请号：ID980978

申请日：1998-07-09

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: C07C253/26 ,  C07C255/08

Abstract: A process for increasing the yield of an ammoxidation product by passing a feed into a reactor, passing an oxygen-containing gas stream containing at least a portion of inerts into the reactor, passing a substantially pure oxygen stream into the reactor, and reducing the flow of the oxygen-containing gas stream while increasing the flow of said substantially pure oxygen stream, wherein the total rate of flow of oxygen from the oxygen-containing gas stream and the substantially pure oxygen stream is maintained in an effective amount to produce the ammoxidation product such that the flow of said inerts passing into the reactor is substan tially reduced.

公开(公告)号：AT368510T

公开(公告)日：2007-08-15

申请号：AT99117339

申请日：1999-09-03

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ANDERSON JOHN ERLING ,  FRANCIS ARTHUR WELLINGTON ,  WAGNER MATTHEW LINCOLN ,  LEGER CHRISTOPHER BRIAN

IPC: B01J3/00 ,  B01F23/10 ,  B01J3/02 ,  B01J8/00 ,  B01J12/00 ,  B01J19/00 ,  B01J19/24 ,  B01J19/26 ,  C01B32/40

Abstract: The invention comprises a reactor having a source of a first hot reactant gas, a mixing chamber in which said first hot reactant gas mixes with a second reactant gas to form a reactant gas mixture, but wherein substantially no reaction takes place and a reaction zone wherein said mixture undergoes vapor phase reaction. A process for using the reactor is also disclosed.

公开(公告)号：DE69723769D1

公开(公告)日：2003-09-04

申请号：DE69723769

申请日：1997-05-22

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: C01B21/26

Abstract: Oxygen which is in addition to oxygen from air is injected into a nitric acid production process such that the total amount of additional oxygen injected is distributed between the bleacher and the cooler/condenser train. This process results in reduced oxygen requirements for increasing production, increasing acid strength and decreasing NOx emissions.

公开(公告)号：DE69907122D1

公开(公告)日：2003-05-28

申请号：DE69907122

申请日：1999-12-22

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： ECHEGARAY DIEGO FERNANDEZ ,  VELLOSO ANTONIO AUGUSTO M ,  WAGNER MATTHEW LINCOLN

IPC: C07D201/06 ,  C07D201/10

Abstract: A method for production of caprolactam. The method involves: (a) reacting air with ammonia gas in an ammonia conversion zone to produce nitric oxide; (b) oxidizing at least a portion of the nitric oxide to nitrogen dioxide to produce an NOx-rich process gas stream; (c) reactively absorbing the NOx-rich gas stream with phosphoric acid containing solution in an absorption zone to form nitrate ions; (d) contacting the nitrate ions with air in a degassing zone to produce a nitrate-rich aqueous process stream; (e) reducing the nitrate-rich aqueous stream with hydrogen in the presence of phosphoric acid to produce hydroxylammonium phosphate; (f) oximating the hydroxylammonium phosphate with cyclohexanone to produce cyclohexanone oxime; and (g) converting the cyclohexanone oxime to caprolactam. According to the invention, supplemental oxygen is added downstream of the ammonia conversion zone to increase the quantity and rate of formation of nitrogen dioxide in the NOx-rich process gas stream.

公开(公告)号：DE69614076T2

公开(公告)日：2002-03-14

申请号：DE69614076

申请日：1996-12-26

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN ,  KIRKWOOD DONALD WALTER WELSH ,  KIYONAGA KAZUO

IPC: C07B33/00 ,  C07C57/04 ,  C07C57/145 ,  C07C63/16

Abstract: This invention is directed towards an improved process for the selective gas phase oxidation of a organic reactant using a metal oxide redox catalyst, wherein the organic reactant and air feeds are at a substantially continuous level, the improvement comprising adding a fluctuating flow of oxygen at alternating relatively high and relatively low levels. The invention also teaches means by which a gas may be provided to a reaction process on a fluctuating basis.

公开(公告)号：CA2184020C

公开(公告)日：2002-01-15

申请号：CA2184020

申请日：1996-08-23

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN ,  BERGMAN THOMAS JOHN JR

IPC: B01F23/10 ,  B01J4/00 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07C253/26 ,  B01F3/02 ,  B01F5/04 ,  B01F3/06

Abstract: A system provides an oxygen-bearing gas and a gaseous reactant stream to a fluidized bed reactor. A sparger causes an entraining of the oxygen bearing gas into the reactant gas stream. A feed line couples the sparger to the reactor's fluidized bed and introduces the reactant gas stream and entrained oxygen-bearing gas directly into contact with the fluidized bed. A controller controls both the amount of oxygen-bearing gas and the gaseous reactant so that, at the point of feed injection, the fluidized bed catalyst does not experience an oxygen deficiency. To assure safety, the reactant content of the combined feed and oxygen stream is maintained above an upper flammability limit, preferably with a safety margin of at least 25%. In one embodiment, the system enables the production of acrylonitriles from a feed stream comprising ammonia, propylene and oxygen.