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公开(公告)号：DE50109177D1
公开(公告)日：2006-05-04
申请号：DE50109177
申请日：2001-09-14
Applicant: BASF AG
Inventor： SCHINDLER GOETZ-PETER , MACHHAMMER OTTO , HARTH KLAUS , MUELLER-ENGEL JOACHIM , ZEHNER PETER
IPC: C07C5/333 , B01J21/10 , B01J23/58 , B01J23/62 , B01J23/63 , B01J23/96 , B01J38/14 , C07B61/00 , C07C5/32 , C07C5/48 , C07C11/06
Abstract: In a process for the heterogeneously catalyzed dehydrogenation in one or more reaction zones of one or more dehydrogenatable C 2 -C 30 -hydrocarbons in a reaction gas mixture comprising them, with at least part of the heat of dehydrogenation required being generated directly in the reaction gas mixture in at least one reaction zone by combustion of hydrogen, the hydrocarbon or hydrocarbons and/or carbon in the presence of an oxygen-containing gas, the reaction gas mixture comprising the dehydrogenatable hydrocarbon or hydrocarbons is brought into contact with a Lewis-acid dehydrogenation catalyst which has essentially no Brönsted acidity.
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公开(公告)号：DE50302480D1
公开(公告)日：2006-04-27
申请号：DE50302480
申请日：2003-05-02
Applicant: BASF AG
Inventor： FUCHS EBERHARD , MARTAN HANS , MUELLER-ENGEL JOACHIM
Abstract: A process prepares an aqueous alkali metal acrylate solution by distillatively removing acrylic acid from a mixture as vapors and taking up the vapors immediately from the gas phase into an aqueous alkali solution.
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公开(公告)号：DE50008266D1
公开(公告)日：2004-11-18
申请号：DE50008266
申请日：2000-10-31
Applicant: BASF AG
Inventor： TENTEN ANDREAS , HIBST HARTMUT , MACHHAMMER OTTO , HECHLER CLAUS , MUELLER-ENGEL JOACHIM , UNVERRICHT SIGNE
IPC: C07C51/215 , C07B61/00 , C07C51/25 , C07C57/04 , C07C57/05
Abstract: In a process for the two-stage catalytic gas-phase oxidation of propene to acrylic acid, the reaction gas starting mixture is passed, in a tube-bundle reactor, with a propene loading of >=160 l (S.T.P.) of propene/l.h, first over a fixed catalyst bed 1 present in two successive temperature zones A, B and then over a fixed catalyst bed 2 which is housed either in one further temperature zone C or in two further temperature zones D, E, the temperature of the zone A being kept at a lower temperature than the zone B and the temperature of the zone D at a lower temperature than the zone E.
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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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Patent Agency Ranking
公开(公告)号：DE59706057D1
公开(公告)日：2002-02-21
申请号：DE59706057
申请日：1997-07-09
Applicant: BASF AG
Inventor： ECK BERND , MACHHAMMER OTTO , PROLL THEO , SCHLIEPHAKE VOLKER , MUELLER-ENGEL 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：DE59912996D1
公开(公告)日：2006-02-02
申请号：DE59912996
申请日：1999-12-07
Applicant: BASF AG
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公开(公告)号：DE50003359D1
公开(公告)日：2003-09-25
申请号：DE50003359
申请日：2000-02-28
Applicant: BASF AG
Inventor： SCHROEDER JUERGEN , NESTLER GERHARD , MUELLER-ENGEL JOACHIM
IPC: B01D3/14 , B01D3/34 , C07B61/00 , C07C51/21 , C07C51/43 , C07C51/44 , C07C51/487 , C07C51/50 , C07C57/05 , C07C57/055 , C07C57/07
Abstract: In a process for the preparation of acrylic acid, a product gas mixture obtained by catalytic gas-phase oxidation of a C3-precursor of acrylic acid and containing acrylic acid is directly cooled with a quench liquid and then subjected to fractional condensation in a separation column provided with baffles, said product gas mixture ascending into itself and a crude acrylic acid being removed via a side take-off, and the acrylic acid oligomers formed are cleaved and recycled.
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公开(公告)号：DE59702539D1
公开(公告)日：2000-11-30
申请号：DE59702539
申请日：1997-06-24
Applicant: BASF AG
Inventor： LEHNERT KLAUS , MUELLER-ENGEL 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：DE50205891D1
公开(公告)日：2006-04-27
申请号：DE50205891
申请日：2002-11-08
Applicant: BASF AG
Inventor： HAMMON ULRICH , BAUMANN DIETER , HEILEK JOERG , MUELLER-ENGEL JOACHIM , ECK BERND
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