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：SG50765A1

公开(公告)日：1998-07-20

申请号：SG1996010696

申请日：1996-09-27

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  SCHLIEPHAKE VOLKER ,  PIES WOLFGANG ,  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：CA2259162A1

公开(公告)日：1997-12-24

申请号：CA2259162

申请日：1997-06-19

Applicant: BASF AG

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

IPC: F23G7/06 ,  C07C51/42 ,  C07C57/04 ,  C07C57/07 ,  F23D17/00 ,  F23G5/00 ,  F23G7/04

Abstract: In a method for removing low, medium and high-boiling by-products obtained when producing acrylic acids or methacrylic acids, the gaseous low-boiling byproducts are burned, whereby low and medium-boiling by-products hat have been dissolved in water, if desired together with high-boiling by-products that have been treated with the dissolvent, are taken to the burning stage.

公开(公告)号：CA2174654A1

公开(公告)日：1995-04-27

申请号：CA2174654

申请日：1994-10-11

Applicant: BASF AG

Inventor： TENTEN ANDREAS ,  HAMMON ULRICH ,  WEIDLICH PETER

IPC: B01J23/00 ,  B01J23/28 ,  B01J23/88 ,  B01J23/887 ,  B01J23/888 ,  B01J37/00 ,  B01J37/02 ,  B01J37/08 ,  C07B33/00 ,  C07B35/04 ,  C07C51/25 ,  C07C57/04 ,  C07C57/055 ,  C07C253/26

Abstract: Proposed is a method of producing catalytically active multi-metal oxide compositions containing Mo and V, the method calling for a catalyst precursor compound to be calcined at a temperature of 300 to 450 ~C in an atmosphere consisting of inert gases and/or steam plus 0.5 to 4 % by vol. of O2 and, averaged over the calcination time, 1 to 8 % by vol. of NH3.

公开(公告)号：DE3376801D1

公开(公告)日：1988-07-07

申请号：DE3376801

申请日：1983-08-08

Applicant: BASF AG

Inventor： HOELDERICH WOLFGANG DR ,  RIEKERT LOTHAR DR ,  KOTTER MICHAEL DR ,  HAMMON ULRICH

IPC: B01J29/26 ,  B01J29/40 ,  B01J29/46 ,  B01J37/00 ,  C07C1/20 ,  C07C9/04 ,  C07C15/00 ,  B01J29/28