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    THE PREPARATION OF 1, 6-HEXANEDIOL AND CAPROLACTONE
    11.
    发明专利
    THE PREPARATION OF 1, 6-HEXANEDIOL AND CAPROLACTONE 未知

    公开(公告)号：MY118128A

    公开(公告)日：2004-09-30

    申请号：MYPI9700759

    申请日：1997-02-27

    Applicant: BASF AG

    Inventor： BREITSCHEIDEL BORIS ,  STEIN FRANK ,  RUST HARALD ,  BAUR KARL GERHARD ,  FISCHER ROLF ,  PINKOS ROLF

    IPC: C07C29/149 ,  C07D313/04 ,  C07C27/12 ,  C07C29/80 ,  C07C29/88 ,  C07C31/20 ,  C07C31/27 ,  C07C51/31 ,  C07D315/00

    Abstract: A PROCESS FOR PREPARING 1, 6-HEXANEDIOL AND e-CAPROLACTONE FROM A CARBOXYLIC ACID MIXTURE WHICH COMPRISES ADIPIC ACID, 6-HYDROXYCAPROIC ACID AND SMALL AMOUNTS OF 1,4-CYCLOHEXANEDIOLS AND WHICH IS OBTAINED AS BYPRODUCT OF THE OXIDATION OF CYCLOHEXANE TO CYCLOHEXANONE/CYCLOHEXANOL WITH OXYGEN OR OXYGEN-CONTAINING GASES BY WATER EXTRACTION OF THE REACTION MIXTURE, BY ESTERIFICATION AND HYDROGENATION OF A PART STREAM TO GIVE HEXANEDIOL AND CYCLIZATION OF 6-HYDROXYCAPROIC ESTER TO CAPROLACTONE, WHEREIN A) THE MONO- AND DICARBOXYLIC ACIDS PRESENT IN THE AQUEOUS REACTION MIXTURE ARE REACTED WITH A LOW MOLECULAR WEIGHT ALCOHOL TO GIVE THE CORRESPONDING CARBOXYLIC ESTERS, B) THE RESULTING ESTERIFICATION MIXTURE IS SUBJECTED TO A FIRST DISTILLATION STAGE TO REMOVE EXCESS ALCOHOL, WATER AND LOW BOILERS, C) A SECOND DISTILLATION STAGE IS CARRIED OUT ON THE BOTTOM PRODUCT FOR FRACTIONATION INTO AN ESTER FRACTION WHICH IS ESSENTIALLY FREE OF 1,4-CYCLOHEXANEDIOLS AND INTO A FRACTION WHICH COMPRISES AT LEAST THE GREATER PART OF THE 1,4-CYCLOHEXANEDIOLS, D) A THIRD DISTILLATION STAGE IS CARRIED OUT TO REMOVE FROM THE ESTER FRACTION AT LEAST PARTLY A STREAM WHICH ESSENTIALLY-COMPRISES 6-HYDROXYCAPROIC ESTER, E) THE ESTER FRACTION FROM (D), FROM WHICH 6-HYDROXYCAPROIC ESTER HAS BEEN AT LEAST PARTLY REMOVED, IS CATALYTICALLY HYDROGENATED AND THE HYDROGENATION PRODUCT IS DISTILLED IN A CONVENTIONAL MANNER TO ISOLATE 1,6-HEXANEDIOL AND F) THE STREAM WHICH ESSENTIALLY COMPRISES 6-HYDROXYCAPROIC ESTER IS HEATED TO ABOVE 200°C UNDER REDUCED PRESSURE, RESULTING IN CYCLIZATION OF 6-HYDROXYCAPROIC ESTER TO CAPROLACTONE, AND THE CYCLIZATION PRODUCT IS DISTILLED TO ISOLATE PURE e-CAPROLACTONE.

    12.
    发明专利
    未知

    公开(公告)号：BR9810471A

    公开(公告)日：2000-09-19

    申请号：BR9810471

    申请日：1998-06-26

    Applicant: BASF AG

    Inventor： HENNIG GUNNAR ,  SCHRAUT ARMIN ,  MARTIN FRIEDRICH-GEORG ,  ULBRICH MICHAEL-DIETER ,  BAUR KARL GERHARD ,  THIESSEN FRITZ

    IPC: C07C67/08 ,  C07C67/54 ,  C07C69/54

    Abstract: The invention relates to a method for producing alkyl(meth)acrylate by continuous reaction of an aqueous solution containing (meth)acrylic acid obtained directly from gas-phase oxidation by reacting with a straight-chain or branched alkanol with 1 to 6 C atoms or a mixture of two or more thereof in the presence of an esterification catalyst. The inventive method is characterized in that alkanol is introduced into aqueous solution containing (meth)acrylic acid in the form of a gas.

    14.
    发明专利
    未知

    公开(公告)号：ID17993A

    公开(公告)日：1998-02-19

    申请号：ID962699

    申请日：1996-09-24

    Applicant: BASF AG

    Inventor： BAUR KARL GERHARD ,  ANNEN ULRICH ,  EXNER HERBERT ,  FRIED MICHAEL ,  RAUH ULRICH

    IPC: C07C67/08 ,  C07C67/327 ,  C07C69/54 ,  C07C67/16

    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.

    PROCESS FOR PREPARING 1,6 HEXANE DIOL WITH A LEVEL OF PURITYOVER 99 %
    17.
    发明专利
    PROCESS FOR PREPARING 1,6 HEXANE DIOL WITH A LEVEL OF PURITYOVER 99 % 未知

    公开(公告)号：CA2247991C

    公开(公告)日：2006-06-27

    申请号：CA2247991

    申请日：1997-02-28

    Applicant: BASF AG

    Inventor： BREITSCHEIDEL BORIS ,  FISCHER ROLF ,  PINKOS ROLF ,  RUST HARALD ,  STEIN FRANK ,  BAUR KARL GERHARD

    IPC: C07C31/20 ,  C07C29/149

    Abstract: The invention relates to a process for the preparation of 1,6 hexane diol fr om a carboxylic acid mixture containing adipic acid, 6-hydroxy caproic acid and, in small quantities, 1,4 cyclohexane diols. Said mixture is obtained as a by-product of the oxidation of cyclohexane into cyclohexanone/ cyclohexanol by water extraction of the reaction mixture. Said process involves esterification of the acids and hydrogenation. According to this process (a) the monocarboxylic acids an d the dicarboxylic acids contained in the aqueous dicarboxylic acid mixture are reacted with a low-molecular alcohol to form the corresponding carboxylic acid esters; (b) the excess alcohol and low-boiling agents of the resultant esterification mixture are released in a first distillation stage; (c) separating into an ester fraction substantially free of 1,4 cyclohexane diols and a fraction containing at least the greater part of the 1,4 cyclohexane diols is carried out from the bottom product in a second distillation stage; (d) the ester fraction substantially free of 1,4 cyclohexane diols is catalytically hydrogenated; and (e) in a pure distillation stage 1,6 hexane diol is extracted from the hydrogenated discharge in a known manner.

    18.
    发明专利
    未知

    公开(公告)号：ES2156363T3

    公开(公告)日：2001-06-16

    申请号：ES97905119

    申请日：1997-02-28

    Applicant: BASF AG

    Inventor： BAUR KARL GERHARD ,  FISCHER ROLF ,  PINKOS ROLF ,  STEIN FRANK ,  RUST HARALD ,  BREITSCHEIDEL BORIS

    IPC: B01J23/80 ,  B01J23/889 ,  C07B61/00 ,  C07C29/149 ,  C07C31/20

    Abstract: PCT No. PCT/EP97/00980 Sec. 371 Date Aug. 28, 1998 Sec. 102(e) Date Aug. 28, 1998 PCT Filed Feb. 28, 1997 PCT Pub. No. WO97/31882 PCT Pub. Date Sep. 4, 19971,6-Hexanediol is prepared from a carboxylic acid mixture comprising adipic acid, 6-hydroxycaproic acid and small amounts of 1,4-cyclohexanediols which is obtained as a by-product in the oxidation of cyclohexane to cyclohexanone/cyclohexanol by water extraction of the reaction mixture, by esterification of the acids and hydrogenation wherein a) the monocarboxylic and dicarboxylic acids present in the aqueous dicarboxylic acid mixture are reacted with a low molecular weight alcohol to give the corresponding carboxylic esters, b) the resulting esterification mixture is freed of excess alcohol and low boilers in a first distillation stage, c) the bottoms are fractionated in a second distillation stage to give an ester fraction essentially free of 1,4-cyclohexanediols and a fraction comprising at least the major part of the 1,4-cyclohexanediols, d) the ester fraction essentially free of 1,4-cyclohexanediols is catalytically hydrogenated and e) in a pure distillation stage, 1,6-hexanediol is isolated from the hydrogenation product in a manner known per se.

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