公开(公告)号：DE59703470D1

公开(公告)日：2001-06-07

申请号：DE59703470

申请日：1997-02-28

Applicant: BASF AG

Inventor： BAUR 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.

公开(公告)号：DE59802649D1

公开(公告)日：2002-02-21

申请号：DE59802649

申请日：1998-06-26

Applicant: BASF AG

Inventor： HENNIG GUNNAR ,  SCHRAUT ARMIN ,  MARTIN FRIEDRICH-GEORG ,  ULBRICH MICHAEL-DIETER ,  BAUR 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.

公开(公告)号：DE59701646D1

公开(公告)日：2000-06-15

申请号：DE59701646

申请日：1997-02-28

Applicant: BASF AG

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

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

Abstract: PCT No. PCT/EP97/00990 Sec. 371 Date Aug. 28, 1998 Sec. 102(e) Date Aug. 28, 1998 PCT Filed Feb. 28, 1997 PCT Pub. No. WO97/31883 PCT Pub. Date Sep. 4, 19971,6-hexanediol and epsilon -caprolactone are 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 using oxygen or oxygen-containing gases by water extraction of the reaction mixture, by esterifying and hydrogenating a substream to give hexanediol and cyclizing 6-hydroxycaproic esters to give caprolactone.