公开(公告)号：DE59503252D1

公开(公告)日：1998-09-24

申请号：DE59503252

申请日：1995-09-30

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  LERMER HELMUT DR ,  RAUH ULRICH ,  NESTLER GERHARD DR

IPC: B01D11/04 ,  C07B61/00 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54

Abstract: In the prepn. of a mono(meth)acrylate (I) of a 4-6 C alkandiol (II) from an aq. soln. contg. (I) and (II) by solvent extn., the organic solvent used for extn. is selected from esters (III) of 1-4 C alkanecarboxylic acids and 1-5 C alkanols, simple and mixed 4-8 C dialkyl ethers (IV) and mixts. of these. Also claimed is a method of prepn. and sepg. (I).

公开(公告)号：CZ9602734A3

公开(公告)日：1998-05-13

申请号：CZ273496

申请日：1996-09-18

Applicant: BASF AG

Inventor： BAUR KARL GERHARD DR ,  ANNEN ULRICH DR ,  EXNER HERBERT DR ,  FRIED MICHAEL DR ,  RAUH ULRICH

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

CPC classification number: C07C67/327 ,  C07C69/54

公开(公告)号：ID17993A

公开(公告)日：1998-02-19

申请号：ID962699

申请日：1996-09-24

Applicant: BASF AG

Inventor： BAUR KARL GERHARD ,  ANNEN ULRICH ,  EXNER HERBERT ,  FRIED MICHAEL ,  RAUH ULRICH

IPC: C07C67/08 ,  C07C67/327 ,  C07C69/54 ,  C07C67/16

Abstract: A process for the prodn. of (1-4C alkyl) (meth)acrylate esters (AM/AE) from esters of formula (I) and opt. esters of formula (II), in which R = H or Me; R , R = 1-4C alkyl; n = 0 or more. The process comprises reaction in the liq. phase under reduced pressure in presence of acid, with continuous removal of cleavage prods. Also claimed is a process for the prodn. of (AM/AE) by the acid-catalysed esterification of 1-4C alkanols with (meth)acrylic acid, in which by-prods. (I) and (II) are sepd. from the prod. mixt. and subjected to the above cleavage process, and the cleavage prods. are continuously removed and returned to the esterification process.

公开(公告)号：DE19536179A1

公开(公告)日：1997-04-03

申请号：DE19536179

申请日：1995-09-28

Applicant: BASF AG

Inventor： HAMMON ULRICH DR ,  SCHLIEPHAKE VOLKER DR ,  PIES WOLFGANG DR ,  RAUH ULRICH

IPC: C07B63/00 ,  C07C51/44 ,  C07C57/04 ,  C07C57/07

Abstract: A process for the rectification and sepn. of unsatd. carboxylic acids (I) from the solvents in which (I) are absorbed after the synthesis reaction. The process involves interrupting the rectification and flushing out the rectification column with basic soln.

公开(公告)号：MX9603731A

公开(公告)日：1997-03-29

申请号：MX9603731

申请日：1996-08-29

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SHLIEPHAKE VOLKER ,  PIES WOLFGANG ,  RAUH ULRICH

IPC: C07B63/00 ,  C07C51/44 ,  C07C57/04 ,  C07C57/07 ,  C07C51/487

Abstract: Un proceso para la rectificacion de ácidos carboxílicos no saturados a partir de solventes en los cuales los ácidos fueron absorbidos después de la reaccion de síntesis, la reaccion se interrumpe brevemente y se lava la columna de rectificacion con una solucion básica. La interrupcion se realiza a intervalos regulares de tiempo. La solucion básica empleada es una solucion acuosa de hidroxido de metal alcalino y/o metal de tierra alcalina, de preferencia NaOH, KOH, Ca(OH)2 o susoxidos anhidros; se pueden emplear también solventes orgánicos polares alcalinos como aminas o amidas.

公开(公告)号：DE4436245A1

公开(公告)日：1996-04-18

申请号：DE4436245

申请日：1994-10-11

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  LERMER HELMUT DR ,  RAUH ULRICH ,  NESTLER GERHARD DR

IPC: B01D11/04 ,  C07B61/00 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54 ,  C07C31/20

Abstract: In the prepn. of a mono(meth)acrylate (I) of a 4-6 C alkandiol (II) from an aq. soln. contg. (I) and (II) by solvent extn., the organic solvent used for extn. is selected from esters (III) of 1-4 C alkanecarboxylic acids and 1-5 C alkanols, simple and mixed 4-8 C dialkyl ethers (IV) and mixts. of these. Also claimed is a method of prepn. and sepg. (I).

公开(公告)号：DE4436242A1

公开(公告)日：1996-04-18

申请号：DE4436242

申请日：1994-10-11

Applicant: BASF AG

Inventor： DOCKNER TONI DR ,  LERMER HELMUT DR ,  RAUH ULRICH ,  NESTLER GERHARD DR

IPC: C07C57/07 ,  C07C67/08 ,  C07C67/58 ,  C07C69/54 ,  C07C31/20

Abstract: In the sepn. of a di(meth)acrylate (I) of a 4-6 C alkandiol (II) from a mixt. of (II), the mono(meth) acrylate (III) and (I) by extn. with an organic solvent (IV) in the presence of water, the mixt. contg. (I) is supplied to the middle of an extn. column and water and (V) are passed through the column in countercurrent. Also claimed is the prepn. (III), esp. butan-1,4-diol monoacrylate (IIIA).