公开(公告)号：CZ20000898A3

公开(公告)日：2000-06-14

申请号：CZ20000898

申请日：1998-09-10

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  THIEL JOACHIM ,  BROELLOS KLAUS

IPC: B01D5/00 ,  C07C51/44 ,  C07C57/07

CPC classification number: B01D5/003 ,  C07C51/44 ,  C07C57/04

公开(公告)号：DE19838845A1

公开(公告)日：2000-03-02

申请号：DE19838845

申请日：1998-08-26

Applicant: BASF AG

Inventor： ECK BERND ,  THIEL JOACHIM ,  MACHHAMMER OTTO ,  DE DECKER EMILE

IPC: C07C51/25 ,  C07C51/43 ,  C07C57/07

Abstract: Purification of acrylic acid (I) comprises crystallization from a mixture containing (I) and a solvent (II) with a higher boiling point than (I). An Independent claim is also included for the production of (I) by preparing: (a) a gaseous reaction product with the composition of a reaction mixture from catalytic gas phase oxidation of 3 carbon (C) alkanes, alkenes, alkanols, alkanals and/or their precursors to (I); (b) absorbing the reaction product in (II) to give a mixture containing (I) and (II); and (c) purification as above.

公开(公告)号：DE19832962A1

公开(公告)日：2000-01-27

申请号：DE19832962

申请日：1998-07-22

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG ,  SCHLIEPHAKE VOLKER

IPC: C07C51/43 ,  C07C57/07

公开(公告)号：BR9710251A

公开(公告)日：1999-08-10

申请号：BR9710251

申请日：1997-07-09

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER ,  MULLER-ENGEL KLAUS JOACHIM

IPC: C07C57/04 ,  C07C51/21 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

Abstract: A process for preparing acrylic acid or methacrylic acid comprises(a) preparing a gaseous product mixture having essentially the composition of a reaction mixture of the catalytic gas phase oxidation of C3-/C4-alkanes, -alkenes, -alkanols and/or -alkanals and/or precursors thereof to form acrylic acid or methacrylic acid, characterized by(b) condensing said product mixture,(c) crystallizing acrylic acid or methacrylic acid from the solution obtained in step (b), and(d) removing the resulting crystals from the mother liquor.

公开(公告)号：CZ9900073A3

公开(公告)日：1999-05-12

申请号：CZ7399

申请日：1997-07-09

Applicant: BASF AG

Inventor： ECK BERND ,  MACHHAMMER OTTO ,  PROLL THEO ,  SCHLIEPHAKE VOLKER

IPC: C07C57/04 ,  C07C51/21 ,  C07C51/43 ,  C07C57/05 ,  C07C57/07

CPC classification number: C07C51/43 ,  C07C57/04

公开(公告)号：MX9809574A

公开(公告)日：1999-03-31

申请号：MX9809574

申请日：1997-06-24

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  MULLER-ENGEL KLAUS JOACHIM ,  NESTLER GERHARD ,  ECK BERND

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.

公开(公告)号：DE19718088A1

公开(公告)日：1998-11-05

申请号：DE19718088

申请日：1997-04-29

Applicant: BASF AG

Inventor： ECK BERND ,  HEILEK JOERG

IPC: B01D9/02 ,  B01D9/00 ,  C01D1/30 ,  C07C29/78 ,  C07C31/20 ,  C07C51/43 ,  C07C53/08

Abstract: - Crystallisation of a material (I) to be recovered involves (i) evaporation of a fluid (II) from a melt or solution containing (I), (II) and optionally other components; and (ii) condensation or absorption of (II) vapour in a liquid material to form a liquid mixture, in which (I) and (II) are selected from (a) inorganic salts and salts of organic compounds and their solvates, preferably hydrates, in water and/or organic solvents; (b) organic components in a mixture of organic compounds and/or water with close boiling points, where the difference in concentrations of the gas and liquid phases in equilibrium at the crystallisation pressure and temperature is

公开(公告)号：DE19703651A1

公开(公告)日：1998-08-06

申请号：DE19703651

申请日：1997-01-31

Applicant: BASF AG

Inventor： FRITZ GERHARD DR ,  WACHE HARRO DR ,  ECK BERND ,  HEILEK JOERG ,  GRUENENWALD THOMAS ,  GRAUENHORST KARL RAINER

IPC: A61K31/415 ,  A61K31/495 ,  A61P31/04 ,  C07D233/28 ,  C07D233/54 ,  C07D233/58 ,  C07D233/60 ,  C07D233/62 ,  C07D233/64 ,  C07D233/92 ,  C07D405/06 ,  C07D409/12 ,  C07D521/00 ,  A01N43/50

公开(公告)号：DE19637380C1

公开(公告)日：1998-04-09

申请号：DE19637380

申请日：1996-09-13

Applicant: BASF AG

Inventor： WEYER HANS-JUERGEN DR ,  ECK BERND ,  BAUMANN DIETER ,  MALTRY BERNHARD

IPC: B01J2/00 ,  B01J2/02 ,  B01J2/26 ,  C07C67/52 ,  C07C69/675 ,  B01J2/06

Abstract: The production of neopentyl glycolhydroxypivalate (NPG-HP) granules (I) comprises pouring molten NPG-HP onto a cooling surface so that the melt solidifies, using a melt containing 3 wt.% NPG-HP crystals. Also claimed are: (i) NPG-HP granules (I) obtained by the above process, especially: (a) spherical granules with an average diameter of 3-16 mm; or (b) granules with an average diameter of 20-100 mm and at least two parallel faces 15-30 mm apart; and (ii) the use of a granulating system for the above process, with a precooler (2) for the NPG-HP melt, a precrystalliser (3), and a drop-forming system (4) or a flat spreader to bring the melt onto a cooling belt (6), with a crusher if a flat spreader is used.

公开(公告)号：ID17665A

公开(公告)日：1998-01-15

申请号：ID972392

申请日：1997-07-10

Applicant: BASF AG

Inventor： LEHNERT KLAUS ,  ENGEL KLAUS JOACHIM MULLER ,  ECK BERND ,  NESTLER GERHARD

IPC: C07C57/04 ,  C07C51/43 ,  C07C57/07 ,  C07C57/075

Abstract: PCT No. PCT/EP97/03304 Sec. 371 Date Dec. 30, 1998 Sec. 102(e) Date Dec. 30, 1998 PCT Filed Jun. 24, 1997 PCT Pub. No. WO98/01414 PCT Pub. Date Jan. 15, 19981,4-Dibenzothiazine-comprising crude acrylic acid is purified by crystallization by raising its diacrylic acid content to at least 1% by weight prior to the crystallization step.