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公开(公告)号：DE19536184A1
公开(公告)日：1997-04-03
申请号：DE19536184
申请日：1995-09-28
Applicant: BASF AG
Inventor： AICHINGER HEINRICH DR , FRIED MICHAEL DR , NESTLER GERHARD DR
IPC: B01J27/02 , B01J31/02 , C07C27/02 , C07C67/08 , C07C67/327 , C07C67/54 , C07C67/60 , C07C69/54 , C07C67/48 , C07C69/67 , C07C69/708
Abstract: A process for the esterification of (meth)acrylic acid with an alkanol in presence of a catalyst, in which unreacted starting cpds. and the required ester are sepd. by distn. and a bottom prod. contg. an oxy-ester is obtd. The process involves taking off the bottom prod., sepn. of the oxy-ester by distn. and cleavage of the distillate in presence of acid (I) at elevated temp.
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公开(公告)号：DE19536183A1
公开(公告)日：1997-04-03
申请号：DE19536183
申请日：1995-09-28
Applicant: BASF AG
Inventor： BAUR KARL GERHARD DR , ANNEN ULRICH DR , EXNER HERBERT DR , FRIED MICHAEL DR , RAUCH ULRICH
IPC: C07C67/08 , C07C67/327 , C07C69/54 , C07C67/48 , C07C69/67 , C07C67/313
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：DE19648745A1
公开(公告)日：1998-05-28
申请号：DE19648745
申请日：1996-11-25
Applicant: BASF AG
Inventor： AICHINGER HEINRICH DR , FRIED MICHAEL DR , NESTLER GERHARD DR , DAMS ALBRECHT DR
Abstract: The invention relates to a method for producing (meth)acrylic acid esters by reacting (meth)acrylic acid with C4-C12-alkanols in the presence of sulfuric acid or of a sulfuric acid mono-C4-C12-alkyl ester as a catalyst, wherein the catalyst is regenerated by extraction with water from the reaction mixture and the aqueous catalyst solution is reintroduced into the esterification. The concentration of non-reacted alkanol in the reaction mixture that is to be extracted amounts to a maximum of 5 wt.% in relation to said reaction mixture.
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公开(公告)号：CZ9602734A3
公开(公告)日：1998-05-13
申请号：CZ273496
申请日：1996-09-18
Applicant: BASF AG
Inventor： BAUR KARL GERHARD DR , ANNEN ULRICH DR , EXNER HERBERT DR , FRIED MICHAEL DR , RAUH ULRICH
IPC: C07C67/08 , C07C67/327 , C07C69/54
CPC classification number: C07C67/327 , C07C69/54
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公开(公告)号：DE2218935A1
公开(公告)日：1973-10-31
申请号：DE2218935
申请日：1972-04-19
Applicant: BASF AG
Inventor： FRIED MICHAEL DR , MOELLER ROLF DR , ZUERN LUDWIG DR , STAHNECKER ERHARD DR
Abstract: Solutions of N-vinylpyrrolidone polymers can be prepared with particular advantage by polymerization of N-vinylpyrrolidone in an aqueous medium by adding the polymerization catalyst in portions or continuously to the monomer solution in the form of a finely divided suspension in an aqueous solution of N-vinylpyrrolidone polymer.
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Patent Agency Ranking
公开(公告)号：ES2130729T3
公开(公告)日：1999-07-01
申请号：ES96115455
申请日：1996-09-26
Applicant: BASF AG
Inventor： AICHINGER HEINRICH DR , FRIED MICHAEL DR , NESTLER GERHARD DR
Abstract: A process for the esterification of (meth)acrylic acid with an alkanol in presence of a catalyst, in which unreacted starting cpds. and the required ester are sepd. by distn. and a bottom prod. contg. an oxy-ester is obtd. The process involves taking off the bottom prod., sepn. of the oxy-ester by distn. and cleavage of the distillate in presence of acid (I) at elevated temp.
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公开(公告)号：DE19701737A1
公开(公告)日：1998-07-23
申请号：DE19701737
申请日：1997-01-20
Applicant: BASF AG
Inventor： AICHINGER HEINRICH DR , FRIED MICHAEL DR , NESTLER GERHARD DR , HERBST HOLGER DR
Abstract: The invention concerns a process for the esterification of (meth)acrylic acid with an alkanol, oxyesters formed as a by-product of esterification being cleaved in turn in an acid-catalysed manner by the addition of monomeric and/or oligomeric (meth)acrylic acid and water.
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公开(公告)号：CZ270096A3
公开(公告)日：1998-05-13
申请号：CZ270096
申请日：1996-09-16
Applicant: BASF AG
Inventor： AICHINGER HEINRICH DR , FRIED MICHAEL DR , NESTLER GERHARD DR
Abstract: A process for the esterification of (meth)acrylic acid with an alkanol in presence of a catalyst, in which unreacted starting cpds. and the required ester are sepd. by distn. and a bottom prod. contg. an oxy-ester is obtd. The process involves taking off the bottom prod., sepn. of the oxy-ester by distn. and cleavage of the distillate in presence of acid (I) at elevated temp.
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公开(公告)号：DE59601814D1
公开(公告)日：1999-06-10
申请号：DE59601814
申请日：1996-09-26
Applicant: BASF AG
Inventor： AICHINGER HEINRICH DR , FRIED MICHAEL DR , NESTLER GERHARD DR
Abstract: A process for the esterification of (meth)acrylic acid with an alkanol in presence of a catalyst, in which unreacted starting cpds. and the required ester are sepd. by distn. and a bottom prod. contg. an oxy-ester is obtd. The process involves taking off the bottom prod., sepn. of the oxy-ester by distn. and cleavage of the distillate in presence of acid (I) at elevated temp.
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公开(公告)号：DE19648743A1
公开(公告)日：1998-05-28
申请号：DE19648743
申请日：1996-11-25
Applicant: BASF AG
Inventor： AICHINGER HEINRICH DR , FRIED MICHAEL DR , NESTLER GERHARD DR
Abstract: The invention relates to a method for producing (meth)acrylic acid esters by making (meth)acrylic acid react with C4-C6 alkanols in the presence of a strong inorganic acid or of C4-C6 monoalkyl ester of a polyvalent strong acid as catalyzer. Said method is characterized in that the non-reacted alkanol is removed through distillation from the reaction mixture obtained and subsequently the catalyzer is eliminated from the mixture obtained.
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