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公开(公告)号：AU5482001A
公开(公告)日：2001-11-12
申请号：AU5482001
申请日：2001-04-30
Applicant: BASF AG
Inventor： BASSLER PETER , BAUMANN DIETER , FISCHER ROLF-HARTMUTH , FUCHS EBERHARD , MELDER JOHANN-PETER , OHLBACH FRANK
IPC: C07D223/12 , C07D201/08
Abstract: A process for the preparation of caprolactam is provided, whereina) a mixture (I) containing 6-aminocapronitrile and water is reacted in the gas phase, in the presence of a catalyst, to give a mixture (II) containing caprolactam, ammonia, water, high-boiling components and low-boiling components,b) ammonia is then removed from the mixture (II) to give a mixture (III) containing caprolactam, water, high-boiling components and low-boiling components,c) water is then removed from the mixture (III) to give a mixture (IV) containing caprolactam, high-boiling components and low-boiling components, andd) a solid (V) containing caprolactam is then obtained from the mixture (IV) by crystallization, the proportion by weight of caprolactam in the solid (V) being greater than in the mixture (IV).
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公开(公告)号：AU4652801A
公开(公告)日：2001-10-23
申请号：AU4652801
申请日：2001-04-04
Applicant: BASF AG
Inventor： ECK BERND , BAUMANN DIETER , HEILEK JORG , MULLER-ENGEL KLAUS JOACHIM
Abstract: In a process for the purification of a crude acrylic acid melt, the crude acrylic acid melt is converted, under the action of low temperatures, into a crude acrylic acid suspension consisting of acrylic acid crystals and residual melt, and the acrylic acid crystals of the crude acrylic acid suspension are freed from remaining residual melt in a wash column, the production of the acrylic acid crystals of the crude acrylic acid suspension being carried out in the presence of water, the wash column being a wash column with forced transport of the acrylic acid crystals and the wash liquid used being the melt of acrylic acid crystals purified in the wash column.
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公开(公告)号：DE10017903A1
公开(公告)日：2001-10-18
申请号：DE10017903
申请日：2000-04-11
Applicant: BASF AG
Inventor： ECK BERND , BAUMANN DIETER , HEILEK JOERG , MUELLER-ENGEL KLAUS JOACHIM
Abstract: Purifying crude acrylic acid melt by converting to a crude acrylic acid suspension by cooling, and separating from remaining residual melt in wash column. In purifying a crude melt of acrylic acid (I) containing (excluding water) \- 80 wt.% (I), \- 100 ppm weight acetic acid and \- 10 ppm weight propionic acid, a suspension of purer (I) crystals (IA) and less pure residual melt (II) is produced by cooling the crude melt in the presence of 0.20- 10 wt.% water with respect to (I); and, after optional mechanical separation of part of (II), (IA) are freed from (II) in a column operating with forced transport of (IA) by washing with a melt of purified (IA).
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公开(公告)号：DE10003498A1
公开(公告)日：2001-08-02
申请号：DE10003498
申请日：2000-01-27
Applicant: BASF AG
Inventor： DE DECKER EMILE , BASTIAENSEN ERIK , BAUMANN DIETER , ECK BERND , HEILEK JOERG
Abstract: Purification of (meth)acrylic acid by crystallisation is carried out using a combination of >=2 different dynamic crystallisation processes.
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公开(公告)号：CA2303985A1
公开(公告)日：1999-04-01
申请号：CA2303985
申请日：1998-09-05
Applicant: BASF AG
Inventor： PUTTER HERMANN , BAUMANN DIETER , HANNEBAUM HEINZ
IPC: C25B3/25 , C07D307/88 , C25B3/04
Abstract: The invention relates to a method for producing phthalides in which I) phthalate acid or phthalate acid derivatives which are dissolved in an electrolyte are reduced on a cathode in a non-divided electrolysis cell in which the carboxy groups can be replaced by units and can be derived from the carboxy groups in a condensation reaction. One or more hydrogen atoms of the ophenylene unit can be substituted by inert residues. II) Once the reaction has reached a given stage at which the molar ratio relationship (M) which is formed from the portion of phthalide and the sum of the portion of phthalide, phthalate acid or the phthalate acid derivatives in the electrolyte amounts to 0.8:1 to 0.995:1, the electrolyte from the electrolysis cell is removed and III) the phthalide is crystallized out of the electrolyte and separated from the original solution optionally after distillation reprocessing of said electrolyte.
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Patent Agency Ranking
公开(公告)号：CA2280592A1
公开(公告)日：1998-08-20
申请号：CA2280592
申请日：1998-02-09
Applicant: BASF AG
Inventor： OTTO BERNHARD , WISTUBA HERMANN , RAULS MATTHIAS , BAUMANN DIETER
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.
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公开(公告)号：SA1510B1
公开(公告)日：2006-11-04
申请号：SA03240323
申请日：2003-10-08
Applicant: BASF AG
Inventor： THIEL JOACHIM , HAMMON ULRIICH , BAUMANN DIETER , HEILEK JORG , SCHRODER JURGEN , -ENGEL KLAUS JOACHIM
IPC: C07C51/44
Abstract: الملخص: فىطريقةلتحضيرحمضاكريليك preparing acrylic acid،يتمتكثيفالخليطالغازىالمحتوىعلىحمضاكريليك acrylic acid الناتجمنالاكسدةالجزئيةذاتالطورالغازىالحفازةلمركب C3 اولىمنحمضالاكريليك acrylic acid،وبعدالتبريدالمباشربسائلإطفاء،تجزيئيافىعمودفصلمزودبمساحاتفاصلةداخلية،ويتصاعدداخلةبتيارجانبيمنحمضاكريليكخام crude acrylic acid،ويتمتفككاوليجوميرات oligomers حمضالاكريليك acrylic acid المتكونة،وتعريضغازالتفككالناتجالىتقويممتعاكسالاتجاهقبلاعادةتدويره.
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公开(公告)号：DE50304605D1
公开(公告)日：2006-09-21
申请号：DE50304605
申请日：2003-10-06
Applicant: BASF AG
Inventor： THIEL JOACHIM , HAMMON ULRICH , BAUMANN DIETER , HEILEK JOERG , SCHROEDER JUERGEN , MUELLER-ENGEL KLAUS JOACHIM
Abstract: In a process for preparing acrylic acid, an acrylic acid-containing product gas mixture obtained by catalytic gas phase partial oxidation of a C 3 precursor of acrylic acid, after direct cooling with a quench liquid, is fractionally condensed in a separating column provided with internals, rising into itself with sidestream takeoff of crude acrylic acid, and the acrylic acid oligomers which form are dissociated and the resulting dissociation gas is subjected to a countercurrent rectification before it is recycled.
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公开(公告)号：DE50206022D1
公开(公告)日：2006-05-04
申请号：DE50206022
申请日：2002-05-02
Applicant: BASF AG
Inventor： HAMMON ULRICH , ECK BERND , BAUMANN DIETER , HEILEK JOERG , MUELLER-ENGEL JOACHIM
IPC: C07B63/00 , C07B61/00 , C07C51/43 , C07C51/47 , C07C51/48 , C07C57/07 , C07D207/26 , C07D207/267
Abstract: The invention relates to a method for the production of a purified melt of a monomer melt obtained by condensation, absorption or extraction in a crystallizer, wherein the inlet to the crystallizer is subjected to a mechanical solid/liquid separation operation.
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公开(公告)号：DE50108001D1
公开(公告)日：2005-12-15
申请号：DE50108001
申请日：2001-04-04
Applicant: BASF AG
Inventor： ECK BERND , BAUMANN DIETER , HEILEK JOERG , MUELLER-ENGEL JOACHIM
Abstract: In a process for the purification of a crude acrylic acid melt, the crude acrylic acid melt is converted, under the action of low temperatures, into a crude acrylic acid suspension consisting of acrylic acid crystals and residual melt, and the acrylic acid crystals of the crude acrylic acid suspension are freed from remaining residual melt in a wash column, the production of the acrylic acid crystals of the crude acrylic acid suspension being carried out in the presence of water, the wash column being a wash column with forced transport of the acrylic acid crystals and the wash liquid used being the melt of acrylic acid crystals purified in the wash column.
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