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公开(公告)号：CZ173299A3
公开(公告)日：1999-09-15
申请号：CZ173299
申请日：1997-11-21
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD , DAMS ALBERT
Abstract: A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.
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公开(公告)号：CZ173099A3
公开(公告)日：1999-09-15
申请号：CZ173099
申请日：1997-11-21
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD
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公开(公告)号：CA2309619A1
公开(公告)日：1999-05-20
申请号：CA2309619
申请日：1998-11-10
Applicant: BASF AG
Inventor： NESTLER GERHARD , FRIED MICHAEL
Abstract: The invention relates to a device for feeding a fluid into a container comprising a delivery device which leads into the inner space (5) of the container (1), is closed with a rupture disk (18), and is connected to a delivery line for the fluid. In order to increase the operational safety and to avoid an over application of pressure on the rupture disk, the delivery device is designed as a telescopic tube (4) which can telescope into the inner space (5) of the container (1) by means of the pressure of the fluid and is mounted above the highest filling level of the container (1).
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公开(公告)号：SG50766A1
公开(公告)日：1998-07-20
申请号：SG1996010697
申请日：1996-09-27
Applicant: BASF AG
Inventor： BAUR KARL GERHARD , ANNEN ULRICH , EXNER HERBERT , FRIED MICHAEL , RAUH ULRICH
IPC: C07C67/327 , C07C69/54 , C07C67/08
Abstract: A process for the prodn. of (1-4C alkyl) (meth)acrylate esters (AM/AE) from esters of formula (I) and opt. esters of formula (II), in which R = H or Me; R , R = 1-4C alkyl; n = 0 or more. The process comprises reaction in the liq. phase under reduced pressure in presence of acid, with continuous removal of cleavage prods. Also claimed is a process for the prodn. of (AM/AE) by the acid-catalysed esterification of 1-4C alkanols with (meth)acrylic acid, in which by-prods. (I) and (II) are sepd. from the prod. mixt. and subjected to the above cleavage process, and the cleavage prods. are continuously removed and returned to the esterification process.
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公开(公告)号：AU5750798A
公开(公告)日：1998-06-22
申请号：AU5750798
申请日：1997-11-21
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD
Abstract: (Meth)acrylic esters are prepared by reacting (meth)acrylic acid with a C4-C12-alkanol in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, whereina) the reaction is carried out in an esterification unit which comprises a first reactor and at least one further reactor,b) a mixture of (meth)acrylic acid, C4-C12-alkanol and catalyst which contains not more than 5% by weight of water, based on the sum of the starting materials, is introduced into the first reactor,c) the esterification in the first reactor is conducted without removing ester, alkanol or water to a (meth)acrylic acid conversion of at least 40%, but only so far that the mixture remains a single phase, andd) the esterification is continued in at least one further reactor with the water formed being removed by distillation.
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Patent Agency Ranking
公开(公告)号：ES2217608T3
公开(公告)日：2004-11-01
申请号：ES98961104
申请日：1998-10-27
Applicant: BASF AG
Inventor： FRIED MICHAEL , NESTLER GERHARD , KAGELER PAUL LEON , JAMES LAWRENCE EDWIN
Abstract: Free radical polymerizations are immediately terminated by adding a phenothiazine-containing solution whose solvent comprises at least 50% of its weight of an N-alkylpyrrolidone.
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公开(公告)号：DE59704617D1
公开(公告)日：2001-10-18
申请号：DE59704617
申请日：1997-11-21
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD , DAMS ALBRECHT
Abstract: A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.
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公开(公告)号：BR9814025A
公开(公告)日：2000-09-26
申请号：BR9814025
申请日：1998-11-10
Applicant: BASF AG
Inventor： FRIED MICHAEL , NESTLER GERHARD
Abstract: An apparatus for introducing a fluid into a container includes a supply leading into the interior of the container, closed by a bursting disk and connected to a supply line for the fluid. In order to increase the operational safety and to avoid clogging of the bursting disk, the supply is in the form of a telescopic tube which can be extended by the pressure of the fluid into the interior of the container and is mounted above the highest level in the container.
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公开(公告)号：ID24494A
公开(公告)日：2000-07-20
申请号：ID20000883
申请日：1998-11-10
Applicant: BASF AG
Inventor： FRIED MICHAEL , NESTLES GERHARD
Abstract: An apparatus for introducing a fluid into a container includes a supply leading into the interior of the container, closed by a bursting disk and connected to a supply line for the fluid. In order to increase the operational safety and to avoid clogging of the bursting disk, the supply is in the form of a telescopic tube which can be extended by the pressure of the fluid into the interior of the container and is mounted above the highest level in the container.
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公开(公告)号：ID22427A
公开(公告)日：1999-10-14
申请号：ID990386
申请日：1997-11-21
Applicant: BASF AG
Inventor： AICHINGER HEINRICH , FRIED MICHAEL , NESTLER GERHARD , DAMS ALBRECHT
Abstract: A process is described for preparing (meth)acrylic esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or a mono-C4-C12-alkyl sulfate as catalyst, where the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is recycled back to the esterification, the concentration of unreacted alkanol in the reaction mixture to be extracted being not more than 5% by weight, based on the reaction mixture to be extracted.
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