公开(公告)号：DE59605038D1

公开(公告)日：2000-05-31

申请号：DE59605038

申请日：1996-12-13

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  AICHINGER HEIRICH ,  HERBST HOLGER ,  MCGLONE NICOLE E ,  DARLINGTON JERRY W ,  DONATH CALVIN F ,  HEIMANN JOHN C

IPC: B01J27/16 ,  B01J31/02 ,  C07B61/00 ,  C07C27/02 ,  C07C57/04 ,  C07C67/03 ,  C07C67/08 ,  C07C67/54 ,  C07C67/60 ,  C07C69/54

Abstract: A process for esterifying (meth)acrylic acid with an alkanol in the presence of esterification catalyst comprises: (i) sepg. unreacted starting materials and the ester obtd. by distn., and (ii) producing a bottom prod. contg. an oxy-ester. The bottom prod. is isolated and processed by: (a) direct treatment with oligomeric (meth)acrylic acid (I) followed by heating in the presence of acid catalysts other than (I) to effect cleavage of the oxy-ester, or (b) sepn. of the oxy-ester by distn., followed by treatment of the distillate with (I) and thermal cleavage as above.

公开(公告)号：CZ369196A3

公开(公告)日：1997-06-11

申请号：CZ369196

申请日：1996-12-16

Applicant: BASF AG

Inventor： NESTLER GERHARD ,  AICHINGER HEINRICH ,  HERBST HOLGER ,  MCGLONE NICOLE E ,  DARLINGTON JERRY W ,  DONATH CALVIN F ,  HEIMANN JOHN C

IPC: B01J27/04 ,  B01J27/16 ,  C07B61/00 ,  C07C27/02 ,  C07C57/04 ,  C07C67/03 ,  C07C67/08 ,  C07C67/54 ,  C07C67/60 ,  C07C69/54

Abstract: Esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst is claimed, in which unreacted starting materials and the (meth)acrylic acid ester are sepd. by distillation to leave behind an oxyester sump prod. Either (a) (meth)acrylic acid is added directly to the sump prod. and then the oxyester sump is cleaved at high temp. by an acid catalyst other than (meth)acrylic acid, or (b) the oxyester is sepd. from the sump prod. by distillation and then cleaved in the same way as in step (a).

公开(公告)号：DE59909357D1

公开(公告)日：2004-06-03

申请号：DE59909357

申请日：1999-11-05

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  SCHROEDER JUERGEN ,  BECKMANN STEFAN

IPC: C07C67/08 ,  C07C67/327 ,  C07C67/60 ,  C07C69/54

Abstract: In a process for esterifying (meth)acrylic acid with an alkanol in the presence of an esterification catalyst, in which unconverted starting compounds and (meth)acrylic ester to be formed are separated off by distillation and an oxyester-containing bottom product is formed, the bottom product is first separated off and then the oxyesters contained in it are cleaved in the presence of a relatively long-chain alkylbenzenesulfonic acid at elevated temperatures.

公开(公告)号：DE59807142D1

公开(公告)日：2003-03-13

申请号：DE59807142

申请日：1998-10-21

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: B08B3/08 ,  C07C67/03 ,  C07C67/04 ,  C07C67/08 ,  C07C67/48 ,  C07C69/54 ,  C11D7/06 ,  C11D11/00

Abstract: Plant parts which are used for the production or processing of (meth)acrylic esters are cleaned by(a) emptying the plant parts,(b) flushing the plant parts with aqueous 5 to 50% strength by weight alkali metal hydroxide solution,(c) removing the alkali metal hydroxide solution from the plant parts,(d) if required, washing the plant parts with water and(e) if required, drying the plant parts.

公开(公告)号：DE59805307D1

公开(公告)日：2002-10-02

申请号：DE59805307

申请日：1998-01-08

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  FRIED MICHAEL ,  NESTLER GERHARD ,  HERBST HOLGER

IPC: C07C67/08 ,  C07C67/327 ,  C07C67/54 ,  C07C67/60 ,  C07C69/54

Abstract: In a process for esterifying (meth)acrylic acid with an alkanol, oxy ester formed as a byproduct of the esterification is recleaved under acid catalysis with addition of monomeric and/or oligomeric (meth)acrylic acid and water.

公开(公告)号：ES2171659T3

公开(公告)日：2002-09-16

申请号：ES96908047

申请日：1996-03-15

Applicant: BASF AG

Inventor： KOCH ANDREAS ,  AUMULLER ALEXANDER ,  MITULLA KONRAD ,  TREMMEL GREGOR ,  HERBST HOLGER

IPC: C07D211/58 ,  C07B63/04 ,  C07D211/94 ,  C07F9/59 ,  C09K15/22 ,  C09K15/30

Abstract: PCT No. PCT/EP96/01122 Sec. 371 Date Sep. 22, 1997 Sec. 102(e) Date Sep. 22, 1997 PCT Filed Mar. 15, 1996 PCT Pub. No. WO96/29311 PCT Pub. Date Sep. 26, 19964-Acylaminopiperidine N-oxides IaA1B1(Ia)where A1 is hydrogen or an organic radical and B1 is a radical IIa where R1-R4 are each C1-C4-alkyl and R1 and R2, on the one hand, and R3 and R4, on the other hand, may furthermore be bonded to form a 5-membered or 6-membered ring, R5 is H or C114 C4-alkyl and R6 is H or C1-C18-alkyl, are used for stabilizing organic materials against the harmful effect of free radicals, particularly in the distillation of monomers which undergo free radical polymerization, especially styrene.

公开(公告)号：DE59805129D1

公开(公告)日：2002-09-12

申请号：DE59805129

申请日：1998-10-21

Applicant: BASF AG

Inventor： HERBST HOLGER ,  NESTLER GERHARD ,  HAMMON ULRICH

IPC: C07C51/25 ,  C07C51/44 ,  C07C51/48 ,  C07C51/50 ,  C07C57/04 ,  C07C57/055 ,  C07C57/07 ,  C07C57/075

公开(公告)号：BR9908730A

公开(公告)日：2000-11-21

申请号：BR9908730

申请日：1999-03-04

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  HERBST HOLGER ,  NESTLER GERHARD

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

Abstract: In a process for rectificative isolation of (meth)acrylic acid from a mixture containing, as main components, (meth)acrylic acid and an organic liquid having a higher boiling point than (meth)acrylic acid, the rectification is carried out with the addition of a surfactant.

公开(公告)号：BR9813106A

公开(公告)日：2000-08-15

申请号：BR9813106

申请日：1998-10-21

Applicant: BASF AG

Inventor： AICHINGER HEINRICH ,  HERBST HOLGER ,  NESTLER GERHARD ,  SCHROEDER JUERGEN

IPC: B08B3/08 ,  C07C67/03 ,  C07C67/04 ,  C07C67/08 ,  C07C67/48 ,  C07C69/54 ,  C11D7/06 ,  C11D11/00

Abstract: Plant parts which are used for the production or processing of (meth)acrylic esters are cleaned by(a) emptying the plant parts,(b) flushing the plant parts with aqueous 5 to 50% strength by weight alkali metal hydroxide solution,(c) removing the alkali metal hydroxide solution from the plant parts,(d) if required, washing the plant parts with water and(e) if required, drying the plant parts.

公开(公告)号：DE19810962A1

公开(公告)日：1999-09-16

申请号：DE19810962

申请日：1998-03-13

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  HERBST HOLGER ,  NESTLER GERHARD

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

Abstract: A surfactant is added in the separation of (meth)acrylic acid (I) from a mixture containing an organic liquid with a higher boiling point than (I) as main constituent by rectification. An Independent claim is also included for (I) production by catalytic gas phase oxidation of 3/4 carbon (C) educts.