公开(公告)号：CZ20010271A3

公开(公告)日：2001-06-13

申请号：CZ20010271

申请日：1999-07-21

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  SCHLIEPHAKE VOLKER ,  PROLL THEO ,  BROELLOS KLAUS ,  MACHHAMMER OTTO ,  THIEL JOACHIM

IPC: C07C51/43 ,  C07C57/07

公开(公告)号：DE59703206D1

公开(公告)日：2001-05-03

申请号：DE59703206

申请日：1997-01-10

Applicant: BASF AG

Inventor： MACHHAMMER OTTO ,  DOCKNER TONI ,  ENGERT GERD-JUERGEN ,  PROLL THEO

IPC: B01D9/02 ,  B01D3/00 ,  C07B61/00 ,  C07C51/235 ,  C07C51/25 ,  C07C51/43 ,  C07C51/48 ,  C07C57/04 ,  C07C57/05 ,  C07C57/055 ,  C07C57/07 ,  C07C69/54

Abstract: The production of acrylic acid (I) and/or its esters comprises; (a) catalytic gas-phase oxidation of propene and/or acrolein to give a gaseous product containing (I), (b) absorption of the reaction product with a solvent, (c) distillation in a column to give crude (I) and solvent, (d) purification of (I) by crystallisation and optionally (e) esterification of crystallised (I). Also claimed is an apparatus for the process, comprising reactor(s) for stage (a), an absorption column, a distillation column, dynamic crystalliser(s) and static crystalliser(s), and container(s) for intermediate storage.

公开(公告)号：BR9912344A

公开(公告)日：2001-04-17

申请号：BR9912344

申请日：1999-07-21

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  SCHLIEPHAKE VOLKER ,  PROLL THEO ,  BROELLOS KLAUS ,  MACHHAMMER OTTO ,  THIEL JOACHIM

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：SG77590A1

公开(公告)日：2001-01-16

申请号：SG1997000382

申请日：1997-02-21

Applicant: BASF AG

Inventor： MACHHAMMER OTTO ,  DAMS ALBRECHT ,  ECK BERND ,  PROLL THEO

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

Abstract: A process for purifying (meth)acrylic acid by phase separation techniques comprises the following steps: (a) a mixture containing (meth)acrylic acid is separated into distinct phases in the presence of an organic solvent, with the composition of the (meth)acrylic acid-rich phase remaining essentially unchanged, and this acid-rich phase is separated; (b) the remaining phase from step (a) is separated into indistinct phases; and (c) one of the phases from step (b) is returned to step (a). Also claimed is preparation of (meth)acrylic acid. Preferably in step (c) the acid-rich phase is returned to step (a). 1-100 (100) wt.% of the phase remaining from step (a) is used in step (b). Pure end product is added to steps (a) and (b). Step (a) involves crystallisation, freezing or sublimation, preferably static and/or dynamic crystallisation, and most preferably a combined static and dynamic crystallisation in which the residue from the dynamic crystallisation is added to the static crystallisation step and the crystallised product from the static crystallisation is returned to the dynamic crystallisation.

公开(公告)号：CZ2000885A3

公开(公告)日：2000-08-16

申请号：CZ2000885

申请日：1998-09-09

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROELLOS 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：DE19833049A1

公开(公告)日：2000-01-27

申请号：DE19833049

申请日：1998-07-22

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  SCHLIEPHAKE VOLKER ,  PROLL THEO ,  BROELLOS KLAUS ,  MACHHAMMER OTTO ,  THIEL JOACHIM

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

Abstract: In a process for production of acrylic acid by catalytic gas-phase oxidation of a 3C feedstock, the gaseous product is worked up by condensation followed by crystallization of acrylic acid by evaporation under vacuum, both the mother liquor from crystallization and the evaporated solution being at least partly recycled to the condensation stage. The production of acrylic acid comprises: (a) catalytic gas-phase oxidation of 3C alkanes, alkenes, alkanols and/or alkanals and/or precursors thereof to acrylic acid, (b) condensation of the gaseous product mixture, (c) crystallization of acrylic acid by partial evaporation of the solution obtained under vacuum, (d) separation of the crystals from the mother liquor, (e) recycling at least part of the mother liquor from (d) to stage (b) and (f) recycling at least part of the evaporated solution from (c) to stage (b).

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：ID17756A

公开(公告)日：1998-01-22

申请号：ID971896

申请日：1997-06-03

Applicant: BASF AG

Inventor： TENTEN ANDREAS ,  PROLL THEO ,  SCHILDBER HANS-PETER

IPC: B01J23/68 ,  B01J23/31 ,  B01J27/198 ,  B01J27/199 ,  C07B61/00 ,  C07C45/33 ,  C07C47/22 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055 ,  C07B31/00

Abstract: In an industrial process for the heterogeneously catalyzed gas-phase oxidation of propane with molecular oxygen to give acrolein, the feed gas mixture having an initial undiluted molar ratio of the reactants propane:O2 of 7:3 is diluted with the reactant propane and, if desired, inert gases in such a way that the feed gas mixture comprises more than 70% by volume of propane and at least 5% by volume of O2.

公开(公告)号：CA2259945A1

公开(公告)日：1998-01-15

申请号：CA2259945

申请日：1997-07-09

Applicant: BASF AG

Inventor： PROLL THEO ,  MACHHAMMER OTTO ,  ECK BERND ,  MUELLER-ENGEL KLAUS JOACHIM ,  SCHLIEPHAKE VOLKER

IPC: C07C57/04 ,  C07C51/21 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

Abstract: Disclosed is a method of preparing acrylic acid or methacrylic acid by: (a) preparing a gaseous product mixture having essentially the composition of a reaction mixture of catalytic gas-phase oxidation of C3/C4 alkanes, alkenes, alkanols and/or alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, characterized by (b) condensation of the product mixture, (c) crystallization of the acrylic acid or methacrylic acid from the solution obtained in stage (b), and (d) extraction of the resulting crystals from the mother liquor.

公开(公告)号：AU3168697A

公开(公告)日：1998-01-05

申请号：AU3168697

申请日：1997-05-28

Applicant: BASF AG

Inventor： TENTEN ANDREAS ,  PROLL THEO ,  SCHILDBERG HANS-PETER

IPC: B01J23/68 ,  B01J23/31 ,  B01J27/198 ,  B01J27/199 ,  C07B61/00 ,  C07C45/33 ,  C07C47/22 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055

Abstract: In an industrial process for the heterogeneously catalyzed gas-phase oxidation of propane with molecular oxygen to give acrolein, the feed gas mixture having an initial undiluted molar ratio of the reactants propane:O2 of 7:3 is diluted with the reactant propane and, if desired, inert gases in such a way that the feed gas mixture comprises more than 70% by volume of propane and at least 5% by volume of O2.