公开(公告)号：DE10003497A1

公开(公告)日：2001-04-12

申请号：DE10003497

申请日：2000-01-27

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  BAUMANN DIETER ,  DECKER EMILE DE ,  BASTIAENSEN ERIK

IPC: C07C51/43 ,  C07C57/07

Abstract: Purification of (meth)acrylic acid by fractional crystallisation of a liquid mixture is such that (a) the lowest crystallisation stage (S1) is effected dynamically; and (b) the mother liquor from stage (S1) contains >=20 (especially >=45) wt.% impurities other than water.

公开(公告)号：BR9807326A

公开(公告)日：2000-04-18

申请号：BR9807326

申请日：1998-02-09

Applicant: BASF AG

Inventor： RAULS MATTHIAS ,  BAUMANN DIETER ,  WISTUBA HERMANN ,  OTTO BERNHARD

IPC: C07B63/04 ,  C07C51/43 ,  C07C51/50 ,  C07C51/64 ,  C07C55/14 ,  C09K23/52

Abstract: Dicarboxylic acid crystals are prepared from a solution containing at least one organic dicarboxylic acid in a process in which at least one anionic polyelectrolyte having a molecular weight of at least 2000 is added to the solution before or during the crystallization.

公开(公告)号：PL335023A1

公开(公告)日：2000-03-27

申请号：PL33502398

申请日：1998-02-09

Applicant: BASF AG

Inventor： RAULS MATTHIAS ,  BAUMANN DIETER ,  WISTUBA HERMANN ,  OTTO BERNHARD

IPC: C07C51/43 ,  C07C51/50 ,  C07C51/64 ,  C07B63/04 ,  C07C55/14 ,  C09K23/52

Abstract: Dicarboxylic acid crystals are prepared from a solution containing at least one organic dicarboxylic acid in a process in which at least one anionic polyelectrolyte having a molecular weight of at least 2000 is added to the solution before or during the crystallization.

公开(公告)号：DE19741423A1

公开(公告)日：1999-03-25

申请号：DE19741423

申请日：1997-09-19

Applicant: BASF AG

Inventor： PUETTER HERMANN DR ,  HANNEBAUM HEINZ ,  BAUMANN DIETER

IPC: C25B3/25 ,  C07D307/88 ,  C25B3/04

Abstract: Preparation of phthalides (I) involves reducing a phthalic acid compound (II) at the cathode of an electrolysis cell to cause a (II) conversion at a rate of 80-99.5%, followed by crystallizing (I) from the electrolyte. Preparation of phthalides (I) involves reduction of a phthalide compound (II), dissolved in an electrolyte, at the cathode of an undivided electrolysis cell. (II) is selected from phthalic acid and its derivatives in which the carboxy groups are replaced by groups derived from carboxy in a condensation reaction and/or one or more H atoms on the o-phenylene unit are replaced by inert substituents. Reaction is carried out to a conversion such that the molar ratio (I) : ((I) + (II)) is 0.8-0.995 : 1. The electrolyte is then removed from the cell, and (I) is crystallized from the electrolyte (optionally after distillation work-up) and separated from the mother liquor.

公开(公告)号：DE19705329A1

公开(公告)日：1998-08-13

申请号：DE19705329

申请日：1997-02-12

Applicant: BASF AG

Inventor： RAULS MATTHIAS DR ,  BAUMANN DIETER ,  WISTUBA HERMANN DR ,  OTTO BERNHARD DR

IPC: C07C51/43 ,  C07C51/50 ,  C07C51/64 ,  C07C55/14 ,  C09K23/52 ,  C07B63/04 ,  C07C55/00 ,  B01F17/52

Abstract: The invention relates to a method of producing dicarboxlic acid crystallizates from a solution containing at least one organic dicarboxylic acid, wherein at least one anionic polyelectrolyte with a molar mass of at least 2.000 is added to the solution before or during crystallization.

公开(公告)号：SG155925A1

公开(公告)日：2009-10-29

申请号：SG2009061532

申请日：2005-09-22

Applicant: BASF AG

Inventor： TELES JOAQUIM HENRIQUE ,  ROESSLER BEATRICE ,  GENGER THOMAS ,  GLASS ANDREAS ,  BAUMANN DIETER ,  LOENING JAN-MARTIN

Abstract: The present invention relates to a process for purifying a gas mixture comprising dinitrogen monoxide and to the use of a gas mixture purified in this way as an oxidant for olefins. In a further embodiment, the present invention also relates to a process for preparing ketones comprising the oxidation of an olefin with a gas mixture which has been purified in accordance with the invention and comprises dinitrogen monoxide.

公开(公告)号：DE102005055588A1

公开(公告)日：2007-05-24

申请号：DE102005055588

申请日：2005-11-22

Applicant: BASF AG

Inventor： TELES JOAQUIM HENRIQUE ,  ROESLER BEATRICE ,  BAUMANN DIETER

IPC: B01D53/14 ,  B01J20/22 ,  C01B21/22 ,  C07B33/00 ,  C07B35/04 ,  C07B41/00 ,  C07B41/06 ,  F25J3/00

Abstract: Purification of a gas mixture (G-0) comprising dinitrogen monoxide comprises: absorption of (G-0) in an organic solvent; desorption of a gas mixture (G-1) from the loaded organic solvent; absorption of (G-1) in water; and desorption of a gas mixture (G-2) from the loaded water.

公开(公告)号：MY122594A

公开(公告)日：2006-04-29

申请号：MYPI20002548

申请日：2000-06-07

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  BAUMANN DIETER ,  SCHLIEPHAKE VOLKER DR

IPC: C07C51/64 ,  C07C57/07 ,  C07C51/25 ,  C07C51/43 ,  C07C51/47 ,  C07C57/05

Abstract: ACRYLIC ACID OR METHACRYLIC ACID IS PURIFIED BY CRYSTALLIZATION TO OBTAIN CRYSTALS AND A MOTHER LIQUOR, BY A PROCESS IN WHICH THE CRYLTALS ARE WASHED WITH A WASH LIQUID CONTAINING THE ACID AND HAVING A TEMPERATURE FROM 15 TO 40 C. FURTHERMORE, A PROCESS FOR THE PREPARATION OF ARCYLIC ACID OR METHACRYLIC ACID COMPRISES THE ABOVEMENTIONED PURIFICATION PROCESS.

公开(公告)号：DE10223058A1

公开(公告)日：2003-12-11

申请号：DE10223058

申请日：2002-05-24

Applicant: BASF AG

Inventor： HAMMON ULRICH ,  BAUMANN DIETER ,  HEILEK JOERG ,  MUELLER-ENGEL KLAUS JOACHIM ,  ECK BERND

IPC: B01D9/00 ,  C07C7/14 ,  C07C57/07 ,  C07D207/26 ,  C07D207/267 ,  C08G69/24 ,  C08L39/06

Abstract: Process for the separation of crystals from suspension in a mother liquor comprises addition of the suspension to a wash column having a wall enveloping a process chamber. The wall is of metal and the face away from the process chamber is heated along at least the length of the purified melt zone. A process for the separation of crystals from suspension in a mother liquor comprises: (a) addition of the suspension to a wash column having a wall enveloping a process chamber, (b) feeding of the suspension to the process chamber to form a bed of crystals in the chamber and (c) conveying of the bed of crystals in the process chamber by means of gravity with a counter current flow of a purified melt of the crystals to form a wash front such that the bed of crystals is partitioned into a mother liquor zone and a purified melt zone. The wall is of metal and is heated on the face away from the process chamber along at least the length of the purified melt zone.

公开(公告)号：DE59807489D1

公开(公告)日：2003-04-17

申请号：DE59807489

申请日：1998-09-18

Applicant: BASF AG

Inventor： BAUMANN DIETER ,  PUETTER HERMANN ,  HANNEBAUM HEINZ

IPC: C07D307/88 ,  C25B3/25

Abstract: Phthalides in as-obtained phthalide synthesis reaction mixtures are recovered in pure form by(a) distilling compounds having a boiling point below the boiling point of the phthalide from the reaction mixture, provided such compounds are present in the reaction mixture, to obtain a crude phthalide as bottom product,(b) crystallizing the phthalide from a melt of the crude phthalide.