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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
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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
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.
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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
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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
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.
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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
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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.
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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
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
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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
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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
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.
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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.
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