公开(公告)号：CA2240970A1

公开(公告)日：1998-12-19

申请号：CA2240970

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

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：BR9603543A

公开(公告)日：1998-05-12

申请号：BR9603543

申请日：1996-08-23

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： BERGMAN THOMAS JOHN JR ,  WAGNER MATTHEW LINCOLN

IPC: B01F23/10 ,  B01J4/00 ,  B01J8/18 ,  B01J8/24 ,  B01J19/00 ,  C07C253/26 ,  B01J8/22 ,  C07B41/00 ,  C07C253/24

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.

公开(公告)号：CA2205788A1

公开(公告)日：1997-11-23

申请号：CA2205788

申请日：1997-05-22

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： WAGNER MATTHEW LINCOLN

IPC: C01B21/26 ,  C01B21/38

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：ES2201222T3

公开(公告)日：2004-03-16

申请号：ES97108320

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：DE69907122T2

公开(公告)日：2004-02-26

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：DE69902864T2

公开(公告)日：2003-05-08

申请号：DE69902864

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: An improvement in the conventional process for the production of caprolactam. The process involves: (a) reacting air with ammonia gas in an ammonia conversion zone to produce nitric oxide; (b) oxidizing a portion of the nitric oxide to nitrogen dioxide to produce an NOx-rich process gas stream; (c) reacting the NOx-rich stream with ammonium carbonate in a nitriting zone to produce ammonium nitrite; (d) reducing the ammonium nitrite to hydroxylamine diammonium sulfate; (e) hydrolyzing the hydroxylamine diammonium sulfate to hydroxylamine sulfate; (f) oximating the hydroxylamine sulfate with cyclohexanone to produce cyclohexanone oxime; and (g) converting the cyclohexanone oxime to caprolactam. The process is improved by adding supplemental oxygen 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：AU757469B2

公开(公告)日：2003-02-20

申请号：AU4736799

申请日：1999-09-03

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：PT1013643E

公开(公告)日：2002-12-31

申请号：PT99125632

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: An improvement in the conventional process for the production of caprolactam. The process involves: (a) reacting air with ammonia gas in an ammonia conversion zone to produce nitric oxide; (b) oxidizing a portion of the nitric oxide to nitrogen dioxide to produce an NOx-rich process gas stream; (c) reacting the NOx-rich stream with ammonium carbonate in a nitriting zone to produce ammonium nitrite; (d) reducing the ammonium nitrite to hydroxylamine diammonium sulfate; (e) hydrolyzing the hydroxylamine diammonium sulfate to hydroxylamine sulfate; (f) oximating the hydroxylamine sulfate with cyclohexanone to produce cyclohexanone oxime; and (g) converting the cyclohexanone oxime to caprolactam. The process is improved by adding supplemental oxygen 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：AT223892T

公开(公告)日：2002-09-15

申请号：AT99125632

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: An improvement in the conventional process for the production of caprolactam. The process involves: (a) reacting air with ammonia gas in an ammonia conversion zone to produce nitric oxide; (b) oxidizing a portion of the nitric oxide to nitrogen dioxide to produce an NOx-rich process gas stream; (c) reacting the NOx-rich stream with ammonium carbonate in a nitriting zone to produce ammonium nitrite; (d) reducing the ammonium nitrite to hydroxylamine diammonium sulfate; (e) hydrolyzing the hydroxylamine diammonium sulfate to hydroxylamine sulfate; (f) oximating the hydroxylamine sulfate with cyclohexanone to produce cyclohexanone oxime; and (g) converting the cyclohexanone oxime to caprolactam. The process is improved by adding supplemental oxygen 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：BR0100085A

公开(公告)日：2001-08-28

申请号：BR0100085

申请日：2001-01-16

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： AKHRAS AMER WAHID ,  WAGNER MATTHEW LINCOLN

IPC: G06F19/00 ,  G01N25/50 ,  G01N33/00 ,  G06G7/48 ,  G01N33/22

Abstract: This invention is directed to a method for predicting the flammability of complex mixtures using critical variables of structural groups comprising training data from the critical variables of each structural groups, the critical variables comprising compositional and thermochemical data from each of the structural groups to produce a neural network model; testing the trained data from the neural network model; and validating the trained and tested data from the neural network to accurately predict the flammability limit of an analogous complex mixture having similar structural groups.