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公开(公告)号:CZ9602736A3
公开(公告)日:1998-05-13
申请号:CZ273696
申请日:1996-09-18
Applicant: BASF AG
Inventor: EXNER HERBERT DR , BAUR KARL DR , DOCKNER TONI DR , POTTHOFF CHRISTINE , DAMS ALBRECHT DR
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公开(公告)号:CZ273496A3
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
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:DE4341770A1
公开(公告)日:1995-06-14
申请号:DE4341770
申请日:1993-12-08
Applicant: BASF AG
Inventor: STERZEL HANS-JOSEF DR , VOGEL HERBERT DR , EXNER HERBERT DR , KRATZ DETLEF DR , BRUDERMUELLER MARTIN DR
Abstract: A process for the preparation of lactic acid esters by fermentation of mixtures containing sugars, conversion of the lactic acid resulting from the fermentation into its salts and subsequent esterification, characterised in that a) alkaline earth metal carbonate or bicarbonate is added to the fermentation broth in order to neutralise at least 50 mol% of the resulting lactic acid, b) the resulting fermentation broth is adjusted to a pH from 7 to 13 by adding NH3 and CO2, and the resulting precipitates are separated off, c) the ammonium lactate solution obtained and purified in this way is esterified with an alcohol
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公开(公告)号:DE59405832D1
公开(公告)日:1998-06-04
申请号:DE59405832
申请日:1994-10-06
Applicant: BASF AG
Inventor: DOCKNER TONI DR , NESTLER GERHARD DR , HERBST HOLGER DR , LERMER HELMUT DR , MARTAN HANS DR , VOGEL HERBERT DR , EXNER HERBERT DR
IPC: C07C57/04 , C07C51/487 , C07C57/055 , C07C57/07 , C07C57/075
Abstract: A process for the purification of crude (meth)acrylic acid in which the crude (meth)acrylic acid is worked up by distillation after addition of a primary amine compound and of an organic sulphonic acid.
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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:CZ9402476A3
公开(公告)日:1995-07-12
申请号:CZ247694
申请日:1994-10-07
Applicant: BASF AG
Inventor: DOCKNER TONI DR , NESTLER GERHARD DR , HERBST HOLGER DR , LERMER HELMUT DR , MARTAN HANS DR , VOGEL HERBERT DR , EXNER HERBERT DR
IPC: C07C57/04 , C07C51/487 , C07C57/055 , C07C57/07 , C07C57/075 , C07C51/42
CPC classification number: C07C51/487 , Y10S203/22 , C07C57/04
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公开(公告)号:CZ247694A3
公开(公告)日:1995-07-12
申请号:CZ247694
申请日:1994-10-07
Applicant: BASF AG
Inventor: DOCKNER TONI DR , NESTLER GERHARD DR , HERBST HOLGER DR , LERMER HELMUT DR , MARTAN HANS DR , VOGEL HERBERT DR , EXNER HERBERT DR
IPC: C07C57/04 , C07C51/487 , C07C57/055 , C07C57/07 , C07C57/075 , C07C51/42
Abstract: A process for the purification of crude (meth)acrylic acid in which the crude (meth)acrylic acid is worked up by distillation after addition of a primary amine compound and of an organic sulphonic acid.
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公开(公告)号:DE4407020A1
公开(公告)日:1994-09-15
申请号:DE4407020
申请日:1994-03-03
Applicant: BASF AG
Inventor: TENTEN ANDREAS DR , NEUMANN HANS-PETER DR , EXNER HERBERT DR
IPC: B01J23/88 , B01J23/887 , B01J35/00 , C01B13/14 , C01B33/20 , C01G1/00 , C01G1/02 , C07B61/00 , C07C45/29 , C07C45/32 , C07C45/35 , C07C45/37 , C07C47/22 , C01B33/00 , C07C45/27 , C07C45/28
Abstract: Multi-metal oxide compositions which are suitable as catalysts for the gas-phase catalytic oxidative preparation of methacrolein from iso-butene, tert-butanol or its methyl ether and here give increased selectivity of methacrolein formation.
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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:DE19536178A1
公开(公告)日:1997-04-03
申请号:DE19536178
申请日:1995-09-28
Applicant: BASF AG
Inventor: EXNER HERBERT DR , BAUR KARL GERHARD DR , DOCKNER TONI DR , POTTHOFF CHRISTIANE , DAMS ALBRECHT DR
Abstract: The continuous prodn. of alkyl(meth)acrylates (I) by the reaction of (meth)acrylic acid (II) and 1-8C monohydric alcohols (III) in homogeneous liq. phase at elevated temp. in the absence of solvent and in presence of an acid esterification catalyst (IV). The process comprises (a) feeding (II), (III) and (IV) continuously into a reaction zone (RZ), (b) removing (I) after a residence time in the form of an azeotrope contg. water or water and (III) in addn. to (I) at the top of a rectifier column (RC) mounted over the RZ, (c) separating the distillate into an organic phase contg. (I) and aq. phase(s) contg. water, (d) recycling part of the organic phase via the top of the column and opt. returning water to the RZ, (e) separating (I) from the rest of the organic phase and removing part of the reaction mixt. continuously from the RZ. The RZ consists of a cascade of at least two reactors in series, and the outflow from one reactor provides the input flow for the next reactor. Also claimed is an appts. for this process.
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