公开(公告)号：JPH11263747A

公开(公告)日：1999-09-28

申请号：JP37347898

申请日：1998-12-28

Applicant: PRAXAIR TECHNOLOGY INC

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

IPC: B01J23/44 ,  B01J23/52 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  C07D301/08

Abstract: PROBLEM TO BE SOLVED: To obtain vinyl acetate with maximizing the selectivity of vinyl acetate and minimizing ethylene lost by purge, by using ethylene, acetic acid and argon-containing oxygen as raw materials and passing the raw materials through specific processes. SOLUTION: Ethylene, acetic acid, an argon-containing oxygen flow and a recycling gas flow are combined to form a gas-phase reaction mixture, which is supplied to a reactor charged with a catalyst. A reaction outflow stream is passed through a cleaning unit to give a vinyl acetate-acetic acid mixture flow and an outflow stream rich in ethylene. A part of the outflow stream rich in ethylene is passed through a carbon dioxide removing apparatus and the outflow stream rich in ethylene is combined with a part of the outflow stream not containing carbon dioxide to form a recycling gas. The vinyl acetate- acetic acid mixture outflow stream is passed through a cleaning apparatus and an acetic acid flow and an acetic acid recycling flow are combined. The oxygen concentration of the argon-containing oxygen flow is increased, the argon concentration is reduced by adjusting the flow rate of a purge flow to give vinyl acetate.

公开(公告)号：JPH10330292A

公开(公告)日：1998-12-15

申请号：JP35400797

申请日：1997-12-09

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： KINGSLEY JEFFREY PAUL ,  DAY ROGER WILLIAM ,  LITZ LAWRENCE MARVIN

IPC: B01F3/04 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  C07B41/00 ,  C07C27/12 ,  C07C35/08 ,  C07C45/33 ,  C07C51/235 ,  C07C53/08 ,  C07C63/26 ,  C07C409/08 ,  C07C409/10 ,  C07C409/20

Abstract: PROBLEM TO BE SOLVED: To provide a liquid-phase oxidation method for an organic liquid by a reactor. SOLUTION: A reactor for holding an organic liquid to be oxidized is prepared. A first oxygen-containing gas is introduced into the lower part of the reactor, the bubbles of the first oxygen-containing gas are passed through the reactor upward to cause the upward flow of the organic liquid and a second oxygen-containing gas is injected to at least one point at which dissolved oxygen is deficient in the reactor.

公开(公告)号：MX9709967A

公开(公告)日：1998-07-31

申请号：MX9709967

申请日：1997-12-09

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： KINGSLEY JEFFREY PAUL ,  DAY ROGER WILLIAM ,  LITZ LAWRENCE MARVIN

IPC: B01F3/04 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  C07B41/00 ,  C07C27/12 ,  C07C35/08 ,  C07C45/33 ,  C07C51/235 ,  C07C53/08 ,  C07C63/26 ,  C07C409/08 ,  C07C409/10 ,  C07C409/20 ,  C07B33/00 ,  B01J19/26

Abstract: La invencion está dirigida a un proceso de oxidacion de fase líquida, en donde un primer gas que contiene oxígeno es inyectado dentro de la porcion inferior de un recipiente de reactor de columna de burbuja que contiene un líquido orgánico oxidable. Un segundo gas que contiene oxígeno es inyectado dentro del reactor en un punto o puntos en donde el líquido carece substancialmente de oxígeno disuelto antes de dicha inyeccion. El oxígeno desde el primero y segundo gases que contienen oxígeno se usa para oxidar el líquido orgánico.

公开(公告)号：BR9802556A

公开(公告)日：2000-04-11

申请号：BR9802556

申请日：1998-07-22

Applicant: PRAXAIR TECHNOLOGY INC

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

IPC: C07C67/055 ,  C07D301/08 ,  C07D301/22 ,  B01J23/50

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：BR9805725A

公开(公告)日：2000-01-11

申请号：BR9805725

申请日：1998-12-29

Applicant: PRAXAIR TECHNOLOGY INC

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

IPC: B01J23/44 ,  B01J23/52 ,  C07B61/00 ,  C07C67/05 ,  C07C67/055 ,  C07C69/15 ,  C07D301/08

Abstract: A method for producing vinyl acetate using ethylene, acetic acid and argon containing oxygen that maximizes selectivity and minimizes ethylene loses to purge.

公开(公告)号：CA2243872A1

公开(公告)日：1999-01-24

申请号：CA2243872

申请日：1998-07-22

Applicant: PRAXAIR TECHNOLOGY INC

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

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：DE69706268T2

公开(公告)日：2002-05-23

申请号：DE69706268

申请日：1997-12-09

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： KINGSLEY JEFFREY PAUL ,  DAY ROGER WILLIAM ,  LITZ LAWRENCE MARVIN

IPC: B01F3/04 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  C07B41/00 ,  C07C27/12 ,  C07C35/08 ,  C07C45/33 ,  C07C51/235 ,  C07C53/08 ,  C07C63/26 ,  C07C409/08 ,  C07C409/10 ,  C07C409/20

Abstract: The invention is directed to a liquid phase oxidation process, wherein a first oxygen-containing gas is injected into the lower portion of a bubble column reactor vessel containing an oxidizeable organic liquid. A second oxygen-containing gas is further injected into the reactor at a point or points wherein the liquid is substantially depleted in dissolved oxygen prior to said injection. Oxygen from both the first and second oxygen-containing gases is used to oxidize the organic liquid.

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：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.

公开(公告)号：PT847800E

公开(公告)日：2002-02-28

申请号：PT97121683

申请日：1997-12-09

Applicant: PRAXAIR TECHNOLOGY INC

Inventor： LITZ LAWRENCE MARVIN ,  KINGSLEY JEFFREY PAUL ,  DAY ROGER WILLIAM

IPC: B01F3/04 ,  B01J10/00 ,  B01J19/00 ,  B01J19/24 ,  C07B41/00 ,  C07C27/12 ,  C07C35/08 ,  C07C45/33 ,  C07C51/235 ,  C07C53/08 ,  C07C63/26 ,  C07C409/08 ,  C07C409/10 ,  C07C409/20

Abstract: The invention is directed to a liquid phase oxidation process, wherein a first oxygen-containing gas is injected into the lower portion of a bubble column reactor vessel containing an oxidizeable organic liquid. A second oxygen-containing gas is further injected into the reactor at a point or points wherein the liquid is substantially depleted in dissolved oxygen prior to said injection. Oxygen from both the first and second oxygen-containing gases is used to oxidize the organic liquid.