公开(公告)号：ZA200308687B

公开(公告)日：2004-11-23

申请号：ZA200308687

申请日：2003-11-07

Applicant: BASF AG

Inventor： BUSCHULTE THOMAS ,  DIEHL VOLKER ,  HAGEN BERND ,  HUTH VOLKER ,  KASTEN WOLFGANG ,  SCHLEMMER PETER ,  SCHROTH AXEL

IPC: B01J8/00 ,  B01J8/04 ,  B01J19/00 ,  C07B61/00 ,  C07C45/33 ,  C07C45/34 ,  C07C45/35 ,  C07C51/215 ,  C07C51/235 ,  C07C51/25 ,  C07C57/05 ,  C07C57/055 ,  G01N21/3504 ,  C07C ,  B01J ,  G01N

Abstract: alpha,beta-ethylenically unsaturated aldehydes and/or carboxylic acids are prepared by means of a two-stage catalytic gas-phase oxidation in which a gas mixture comprising at least an alkane or alkene having from three to six carbon atoms and oxygen is subjected to a catalytic oxidation reaction, in the first stage ( 1 ). oxygen is added to the gases produced in the first stage ( 1 ) and the resulting mixture is introduced into the second stage ( 2 ) in which it is subjected to a further catalytic oxidation reaction. In the process of the present invention, a signal which correlates with the oxygen content of the reaction gases before and/or after the addition of oxygen between the first and second stages ( 1, 2 ) is generated and the oxygen addition is regulated as a function of the signal. Also provided are an apparatus for regulating a process for preparing alpha,beta-ethylenically unsaturated aldehydes and/or carboxylic acids and an apparatus for preparing these substances using the regulating apparatus of the present invention.

公开(公告)号：BR0208674A

公开(公告)日：2004-08-03

申请号：BR0208674

申请日：2002-04-08

Applicant: BASF AG

Inventor： BUSCHULTE THOMAS ,  DIEHL VOLKER ,  HAGEN BERND ,  HUTH VOLKER ,  KASTEN WOLFGANG ,  SCHLEMMER PETER ,  SCHROTH AXEL

IPC: B01J8/00 ,  B01J8/04 ,  B01J19/00 ,  C07B61/00 ,  C07C45/33 ,  C07C45/34 ,  C07C45/35 ,  C07C51/215 ,  C07C51/235 ,  C07C51/25 ,  C07C57/05 ,  C07C57/055 ,  G01N21/3504 ,  C07C21/215 ,  C07C57/08 ,  C07C57/10 ,  G01N21/35 ,  C07C47/22

Abstract: alpha,beta-ethylenically unsaturated aldehydes and/or carboxylic acids are prepared by means of a two-stage catalytic gas-phase oxidation in which a gas mixture comprising at least an alkane or alkene having from three to six carbon atoms and oxygen is subjected to a catalytic oxidation reaction, in the first stage ( 1 ). oxygen is added to the gases produced in the first stage ( 1 ) and the resulting mixture is introduced into the second stage ( 2 ) in which it is subjected to a further catalytic oxidation reaction. In the process of the present invention, a signal which correlates with the oxygen content of the reaction gases before and/or after the addition of oxygen between the first and second stages ( 1, 2 ) is generated and the oxygen addition is regulated as a function of the signal. Also provided are an apparatus for regulating a process for preparing alpha,beta-ethylenically unsaturated aldehydes and/or carboxylic acids and an apparatus for preparing these substances using the regulating apparatus of the present invention.

公开(公告)号：CZ20032737A3

公开(公告)日：2004-05-12

申请号：CZ20032737

申请日：2002-04-08

Applicant: BASF AG

Inventor： BUSCHULTE THOMAS ,  DIEHL VOLKER ,  HAGEN BERND ,  HUTH VOLKER ,  KASTEN WOLFGANG ,  SCHLEMMER PETER ,  SCHROTH AXEL

IPC: B01J8/00 ,  B01J8/04 ,  B01J19/00 ,  C07B61/00 ,  C07C45/33 ,  C07C45/34 ,  C07C45/35 ,  C07C51/215 ,  C07C51/235 ,  C07C51/25 ,  C07C57/05 ,  C07C57/055 ,  G01N21/3504 ,  C07C57/08 ,  C07C57/10

Abstract: alpha,beta-ethylenically unsaturated aldehydes and/or carboxylic acids are prepared by means of a two-stage catalytic gas-phase oxidation in which a gas mixture comprising at least an alkane or alkene having from three to six carbon atoms and oxygen is subjected to a catalytic oxidation reaction, in the first stage ( 1 ). oxygen is added to the gases produced in the first stage ( 1 ) and the resulting mixture is introduced into the second stage ( 2 ) in which it is subjected to a further catalytic oxidation reaction. In the process of the present invention, a signal which correlates with the oxygen content of the reaction gases before and/or after the addition of oxygen between the first and second stages ( 1, 2 ) is generated and the oxygen addition is regulated as a function of the signal. Also provided are an apparatus for regulating a process for preparing alpha,beta-ethylenically unsaturated aldehydes and/or carboxylic acids and an apparatus for preparing these substances using the regulating apparatus of the present invention.

公开(公告)号：DE10117678A1

公开(公告)日：2002-10-10

申请号：DE10117678

申请日：2001-04-09

Applicant: BASF AG

Inventor： BUSCHULTE THOMAS ,  DIEHL VOLKER ,  HAGEN BERND ,  HUTH VOLKER ,  KASTEN WOLFGANG ,  SCHLEMMER PETER ,  SCHROTH AXEL

IPC: B01J8/00 ,  B01J8/04 ,  B01J19/00 ,  C07B61/00 ,  C07C45/33 ,  C07C45/34 ,  C07C45/35 ,  C07C51/215 ,  C07C51/235 ,  C07C51/25 ,  C07C57/05 ,  C07C57/055 ,  G01N21/3504 ,  B01J4/00

Abstract: The invention relates to a method for producing alpha , beta -ethylenically unsaturated aldehydes and/or carboxylic acids by two-step catalytic gas phase oxidation which is characterized in that in the first step (1) a gas mixture containing at least alkane or alkene having three to six carbon atoms and oxygen is subjected to a catalytic oxidation reaction. Oxygen is supplied to the gases produced in the first step (1) and the resulting mixture is added to the second step (2) in which it is subjected to another catalytic oxidation reaction. The inventive method is further characterized in that a signal is obtained that is correlated with the oxygen content of the reaction gases before and/or after addition of oxygen between the first and second step (1, 2) and in that the oxygen supply is controlled on the basis of said signal. The invention further relates to a device for controlling a method for producing alpha , beta -ethylenically unsaturated aldehydes and/or carboxylic acids and to a device for producing said substances using the inventive control device.