公开(公告)号：DE59507043D1

公开(公告)日：1999-11-18

申请号：DE59507043

申请日：1995-12-01

Applicant: BASF AG

Inventor： HERBST HOLGER ,  NESTLER GERHARD ,  HAMMON ULRICH ,  DARLINGTON JERRY

IPC: C07C57/055 ,  C07C51/44 ,  C07C51/46 ,  C07C57/07 ,  C07C57/075 ,  C07C57/04

Abstract: A process for the sepn. of (meth)acrylic acid (I) from a mixt. contg. (a) (I), (b) inert, hydrophobic organic liq. with a higher b.pt. than (I) as main component and (c) lower aldehydes as minor components, comprises rectification with the addn. of a prim. amine and/or salts thereof (II). Also claimed are processes for the prodn. of (I) by gas-phase oxidn. of a 3C/4C starting material (III). Pref. liq. (b) contains diphenyl ether (DPE), and pref. comprises a mixt. of 70-75 wt.% DPE and 25-30 wt.% biphenyl contg. 0.1-25 wt.% (w.r.t. the mixt.) of dimethyl o-phthalate. Amine (II) is a hydrazine deriv., pref. the hydrazide of a carboxylic acid, esp. pref. adipic acid dihydrazide.

公开(公告)号：DE59502240D1

公开(公告)日：1998-06-25

申请号：DE59502240

申请日：1995-11-14

Applicant: BASF AG

Inventor： HERBST HOLGER DR ,  NESTLER GERHARD DR ,  DARLINGTON JERRY ,  MARTAN HANS DR

IPC: C07C57/075 ,  C07C51/44 ,  C07C57/055 ,  C07C57/07 ,  C07C57/04 ,  C07C51/50 ,  C07C51/487

Abstract: In a process for purifying crude (meth)acrylic acid, the crude (meth)acrylic acid is worked up by distillation after addition of an organic carboxylic acid hydrazide and, if desired, an organic sulfonic acid.

公开(公告)号：ES2117349T3

公开(公告)日：1998-08-01

申请号：ES95117892

申请日：1995-11-14

Applicant: BASF AG

Inventor： HERBST HOLGER DR ,  NESTLER GERHARD DR ,  DARLINGTON JERRY ,  MARTAN HANS DR

IPC: C07C57/075 ,  C07C51/44 ,  C07C57/055 ,  C07C57/07 ,  C07C57/04 ,  C07C51/50 ,  C07C51/487

Abstract: In a process for purifying crude (meth)acrylic acid, the crude (meth)acrylic acid is worked up by distillation after addition of an organic carboxylic acid hydrazide and, if desired, an organic sulfonic acid.

公开(公告)号：DK0713854T3

公开(公告)日：1998-10-19

申请号：DK95117892

申请日：1995-11-14

Applicant: BASF AG

Inventor： HERBST HOLGER DR ,  NESTLER GERHARD DR ,  DARLINGTON JERRY ,  MARTAN HANS DR

IPC: C07C57/075 ,  C07C51/44 ,  C07C57/055 ,  C07C57/07 ,  C07C57/04 ,  C07C51/487 ,  C07C51/50

Abstract: In a process for purifying crude (meth)acrylic acid, the crude (meth)acrylic acid is worked up by distillation after addition of an organic carboxylic acid hydrazide and, if desired, an organic sulfonic acid.

公开(公告)号：CZ9503291A3

公开(公告)日：1996-07-17

申请号：CZ329195

申请日：1995-12-13

Applicant: BASF AG

Inventor： HERBST HOLGER DR ,  NESTLER GERHARD DR ,  HAMMON ULRICH DR ,  DARLINGTON JERRY

IPC: C07C57/055 ,  C07C51/44 ,  C07C51/46 ,  C07C57/07 ,  C07C57/075

CPC classification number: C07C51/44 ,  Y10S203/22 ,  C07C57/04

公开(公告)号：SG52746A1

公开(公告)日：1998-09-28

申请号：SG1996008741

申请日：1995-12-01

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  HERBST HOLGER ,  HAMMON ULRICH ,  DARLINGTON JERRY

IPC: C07C51/44 ,  C07C51/46 ,  C07C57/055 ,  C07C57/07 ,  C07C57/075

Abstract: A process for the sepn. of (meth)acrylic acid (I) from a mixt. contg. (a) (I), (b) inert, hydrophobic organic liq. with a higher b.pt. than (I) as main component and (c) lower aldehydes as minor components, comprises rectification with the addn. of a prim. amine and/or salts thereof (II). Also claimed are processes for the prodn. of (I) by gas-phase oxidn. of a 3C/4C starting material (III). Pref. liq. (b) contains diphenyl ether (DPE), and pref. comprises a mixt. of 70-75 wt.% DPE and 25-30 wt.% biphenyl contg. 0.1-25 wt.% (w.r.t. the mixt.) of dimethyl o-phthalate. Amine (II) is a hydrazine deriv., pref. the hydrazide of a carboxylic acid, esp. pref. adipic acid dihydrazide.

公开(公告)号：SG50646A1

公开(公告)日：1998-07-20

申请号：SG1996007648

申请日：1995-11-14

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  MARTAN HANS ,  HERBST HOLGER ,  DARLINGTON JERRY

IPC: C07C57/075 ,  C07C51/44 ,  C07C57/055 ,  C07C57/07 ,  C07C51/50 ,  C07C51/487

Abstract: In a process for purifying crude (meth)acrylic acid, the crude (meth)acrylic acid is worked up by distillation after addition of an organic carboxylic acid hydrazide and, if desired, an organic sulfonic acid.

公开(公告)号：CZ329195A3

公开(公告)日：1996-07-17

申请号：CZ329195

申请日：1995-12-13

Applicant: BASF AG

Inventor： HERBST HOLGER DR ,  NESTLER GERHARD DR ,  HAMMON ULRICH DR ,  DARLINGTON JERRY

IPC: C07C57/055 ,  C07C51/44 ,  C07C51/46 ,  C07C57/07 ,  C07C57/075

Abstract: A process for the sepn. of (meth)acrylic acid (I) from a mixt. contg. (a) (I), (b) inert, hydrophobic organic liq. with a higher b.pt. than (I) as main component and (c) lower aldehydes as minor components, comprises rectification with the addn. of a prim. amine and/or salts thereof (II). Also claimed are processes for the prodn. of (I) by gas-phase oxidn. of a 3C/4C starting material (III). Pref. liq. (b) contains diphenyl ether (DPE), and pref. comprises a mixt. of 70-75 wt.% DPE and 25-30 wt.% biphenyl contg. 0.1-25 wt.% (w.r.t. the mixt.) of dimethyl o-phthalate. Amine (II) is a hydrazine deriv., pref. the hydrazide of a carboxylic acid, esp. pref. adipic acid dihydrazide.