公开(公告)号：DE59702539D1

公开(公告)日：2000-11-30

申请号：DE59702539

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MUELLER-ENGEL JOACHIM ,  NESTLER GERHARD ,  ECK BERND

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.

公开(公告)号：CZ5099A3

公开(公告)日：1999-05-12

申请号：CZ5099

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MULLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERND

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.

公开(公告)号：CZ9900050A3

公开(公告)日：1999-05-12

申请号：CZ5099

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MULLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERND

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

CPC classification number: C07C51/43 ,  C07C57/04

公开(公告)号：DE19827087A1

公开(公告)日：1999-02-25

申请号：DE19827087

申请日：1998-06-18

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  NESTLER GERHARD DR

IPC: C07C51/487 ,  C07C57/07 ,  C07C57/075 ,  C07D239/60 ,  C07D239/62

Abstract: 2,4,6-Trioxo- and 4,6-dioxo-2-thioxo-hexahydropyrimidine compound(s) (I) is used as reagent in the separation of (meth)acrylic acid (II) from mixtures with aldehydes by distillation or rectification. The pyrimidine compounds (I) are of the formula; X = oxygen (O) or S; R , R = H, phenyl or 1-10C alkyl.

公开(公告)号：AU3344097A

公开(公告)日：1998-02-02

申请号：AU3344097

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MULLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERND

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.

公开(公告)号：MX203355B

公开(公告)日：2001-07-30

申请号：MX9809574

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MULLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERND

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.

公开(公告)号：CA2250806A1

公开(公告)日：1998-01-15

申请号：CA2250806

申请日：1997-06-24

Applicant: BASF AG

Inventor： MUELLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERND ,  LEHNERT KLAUS

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: The invention concerns a process for purifying by crystallization crude acrylic acid containing dibenzo-1,4-thiazine, the diacrylic acid content of the crude acrylic acid being set at a higher value before crystallization.

公开(公告)号：BR9710217A

公开(公告)日：1999-08-10

申请号：BR9710217

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MULLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERD

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.

公开(公告)号：MX9809574A

公开(公告)日：1999-03-31

申请号：MX9809574

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MULLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERND

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.

公开(公告)号：ID17665A

公开(公告)日：1998-01-15

申请号：ID972392

申请日：1997-07-10

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  ENGEL KLAUS JOACHIM MULLER ,  ECK BERND ,  NESTLER GERHARD

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.