公开(公告)号：AU9539198A

公开(公告)日：1999-04-05

申请号：AU9539198

申请日：1998-09-09

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROLLOS KLAUS

IPC: C07C51/43 ,  C07C51/44 ,  C07C57/07

Abstract: A process for preparing acrylic acid or methacrylic acid comprises preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid. The product is removed from the gaseous product mixture by a process comprising the following steps:(a) condensing said gaseous product mixture,(b) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (a),(c) removing the resulting crystals from the mother liquor, and(d) recycling at least a portion of said mother liquor from step (c) into step (a).

公开(公告)号：CA2303373A1

公开(公告)日：1999-03-25

申请号：CA2303373

申请日：1998-09-10

Applicant: BASF AG

Inventor： SCHLIEPHAKE VOLKER ,  BROLLOS KLAUS ,  THIEL JOACHIM ,  PROLL THEO ,  MACHHAMMER OTTO ,  ECK BERND

IPC: B01D5/00 ,  C07C51/44 ,  C07C57/07

Abstract: The invention relates to a method for the fractional condensation of a gas mixture which contains at least one other condensable constituent in addition to acrylic acid or methacrylic acid and which also has a high proportion of one or several non-condensable constituents. According to said method, the gas mixture is passed through a column with separation-efficient baffles and the condensable constituents are condensed out by cooling.

公开(公告)号：ES2201539T3

公开(公告)日：2004-03-16

申请号：ES98950022

申请日：1998-09-10

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROLLOS KLAUS

IPC: B01D5/00 ,  C07C51/44 ,  C07C57/07

Abstract: A process for the fractional condensation of a gas mixture which, in addition to acrylic acid or methacrylic acid, also contains at least one further condensable component and additionally a high proportion of one or more noncondensable components, wherein the gas mixture is passed through a column having separatory internals and the condensable components are condensed by cooling.

公开(公告)号：ES2175794T5

公开(公告)日：2008-03-01

申请号：ES98948948

申请日：1998-09-09

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROLLOS KLAUS

IPC: C07C51/43 ,  C07C51/44 ,  C07C57/07

Abstract: Procedimiento para la separación de ácido acrílico o ácido metacrílico a partir de una mezcla gaseosa, que contiene, además de ácido acrílico o ácido metacrílico, aún al menos otro componente, caracterizado porque a) se condensa la mezcla gaseosa, b) se cristaliza ácido acrílico o ácido metacrílico a partir de la disolución obtenida en la etapa a), c) se separa los cristales obtenidos a partir de las aguas madre de la etapa b), y d) se devuelve al menos una cantidad parcial de las aguas madre de la etapa c) a la etapa a) tras la separación.

公开(公告)号：ES2175794T3

公开(公告)日：2002-11-16

申请号：ES98948948

申请日：1998-09-09

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROLLOS KLAUS

IPC: C07C51/43 ,  C07C51/44 ,  C07C57/07

Abstract: A process for preparing acrylic acid or methacrylic acid comprises preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid. The product is removed from the gaseous product mixture by a process comprising the following steps:(a) condensing said gaseous product mixture,(b) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (a),(c) removing the resulting crystals from the mother liquor, and(d) recycling at least a portion of said mother liquor from step (c) into step (a).

公开(公告)号：ID27390A

公开(公告)日：2001-04-05

申请号：ID20010163

申请日：1999-07-21

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JORG ,  SCHLEIPHAKE VOLKER ,  PROLL THEO ,  BROLLOS KLAUS ,  THIEL JOACHIM ,  MACHHAMMER OTTO

IPC: C07C51/225 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

Abstract: A process for the preparation of acrylic acid by:(a) preparation of a gaseous product mixture which essentially has the composition of a reaction mixture of catalytic gas-phase oxidation of C3-alkanes, C3-alkenes, C3-alkanols and/or C3-alkanals and/or intermediates thereof to acrylic acid, which comprises(b) condensation of the gaseous product mixture,(c) crystallization of the acrylic acid from the solution obtained in stage (b), with partial evaporation of the solution under reduced pressure,(d) isolation of the resulting crystals from the mother liquor,(e) recycling of at least a part of the mother liquor from stage (d) to stage (b) and(f) recycling of at least a part of the evaporated solution from stage (c) to stage (b).

公开(公告)号：AU9624998A

公开(公告)日：1999-04-05

申请号：AU9624998

申请日：1998-09-10

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROLLOS KLAUS

IPC: B01D5/00 ,  C07C51/44 ,  C07C57/07

Abstract: A process for the fractional condensation of a gas mixture which, in addition to acrylic acid or methacrylic acid, also contains at least one further condensable component and additionally a high proportion of one or more noncondensable components, wherein the gas mixture is passed through a column having separatory internals and the condensable components are condensed by cooling.

公开(公告)号：CA2303445A1

公开(公告)日：1999-03-25

申请号：CA2303445

申请日：1998-09-09

Applicant: BASF AG

Inventor： BROLLOS KLAUS ,  THIEL JOACHIM ,  SCHLIEPHAKE VOLKER ,  MACHHAMMER OTTO ,  PROLL THEO ,  ECK BERND

IPC: C07C51/43 ,  C07C51/44 ,  C07C57/07

Abstract: The invention relates to a method for producing acrylic acid and methacrylic acid by producing a gaseous product mixture which essentially has the composition of a reaction mixture of the catalytic gas phase oxidation of C3/C4- alkanes, -alkenes, -alkanols or -alkanals or precursors thereof to form acrylic acid or methacrylic acid. The product is separated from the gaseous product mixture according to a method comprising the following steps: a) condensing the gaseous product mixture; b) crystallising the acrylic acid or methacrylic acid from the solution obtained in (a); c) separating the resulting crystals from the mother liquor and d) returning at least a part of the mother liquor from stage (c) to stage (a).