公开(公告)号：JPH10195066A

公开(公告)日：1998-07-28

申请号：JP35346197

申请日：1997-12-22

Applicant: BASF AG

Inventor： BALDENIUS KAI-UWE ,  KAISER WULF ,  BOCKSTIEGEL BERNHARD ,  LAAS HARALD ,  SCHULZ BERNHARD ,  SCHMITT PETER ,  GLIETENBERG HELMUT

IPC: B01J27/138 ,  C07D311/72

Abstract: PROBLEM TO BE SOLVED: To obtain α-tocopherol (vitamin E) important as an antioxidant in the field of nutrition without causing grave waste-water problem from trimethylhydroquinone, etc., by recycling a zinc halide condensation catalyst. SOLUTION: The subject compound is produced by reacting 2,3,5- trimethylhydroquinone with phytol or isophytol in the presence of zinc chloride or zinc bromide and a proton donor such as a mineral acid or toluensulfonic acid. The reaction is carried out in a nonpolar solvent scarcely miscible with water and zinc chloride, etc., are introduced into the reaction system as a mixture of 1mol of the zinc chloride, etc., and 1-4mol of water, separated after the completion of reaction and recycled to the reaction system optionally after concentrating or replenishing to a concentration of about 60-90wt.%.

公开(公告)号：DE19733503A1

公开(公告)日：1999-02-04

申请号：DE19733503

申请日：1997-08-01

Applicant: BASF AG

Inventor： BALDENIUS KAI-UWE ,  KAISER WULF ,  BOCKSTIEGEL BERNHARD ,  LAAS HARALD ,  SCHULZ BERNHARD ,  SCHMITT PETER ,  GLIETENBERG HELMUT

IPC: C07D311/72

Abstract: Preparation of alpha -tocopherol or alpha -tocopheryl acetate comprises reaction of 2,3,5-trimethylhydroquinone (TMH) with phytol or isophytol (IP) in the presence of a zinc halide condensation catalyst and a proton donor, optionally with a final esterification step using acetic anhydride. The reaction involves: (A) a water immiscible or poorly water-miscible non-polar solvent; and (B) 1-4 mole water per mole zinc halide.

公开(公告)号：RU2188823C2

公开(公告)日：2002-09-10

申请号：RU97121291

申请日：1997-12-22

Applicant: BASF AG

Inventor： BALDENIUS KAI-UWE ,  KAISER WULF ,  BOCKSTIEGEL BERNHARD ,  LAAS HARALD ,  SCHULZ BERNHARD ,  SCHMITT PETER ,  GLIETENBERG HELMUT

IPC: B01J27/138 ,  C07D311/72

公开(公告)号：IN186855B

公开(公告)日：2001-11-24

申请号：IN2956MA1997

申请日：1997-12-22

Applicant: BASF AG

Inventor： BALDENIUS KAI-UWE ,  KAISER WULF ,  BOCKSTIEGEL BERNHARD ,  LAAS HARALD ,  SCHULZ BERNHARD ,  SCHMITT PETER ,  GLIETENBERG HELMUT

IPC: B01J27/138 ,  C07D311/72

公开(公告)号：CA1163616A

公开(公告)日：1984-03-13

申请号：CA374327

申请日：1981-03-31

Applicant: BASF AG

Inventor： ENGELBACH HEINZ ,  STEIGLEITER WERNER ,  GLIETENBERG HELMUT

IPC: C07C2/10 ,  B01J27/16 ,  B01J27/18 ,  B01J27/186 ,  B01J37/00 ,  C01B25/26 ,  C01B25/45 ,  C01B35/12 ,  C01B35/14 ,  C07B61/00 ,  C07C1/00 ,  C07C2/18 ,  C07C11/02 ,  C07C67/00

Abstract: Catalysts, for olefin oligomerization, whose active material has the empirical formula I APO4.¢P2O5.(H2O)n!a . (XY)b I where A is boron, antimony, bismuth, aluminum and/or 3 equivalents of titanium, X is NH4? and/or an alkali metal cation and/or one equivalent of an alkaline earth metal cation, Y is one equivalent of an anion, a is 0.020.2, b is 0 - 0.05 and n is 1 - 3, and a process for the preparation of these catalysts.

公开(公告)号：DE59709492D1

公开(公告)日：2003-04-17

申请号：DE59709492

申请日：1997-12-17

Applicant: BASF AG

Inventor： BALDENIUS KAI-UWE ,  KAISER WULF ,  BOCKSTIEGEL BERNHARD ,  LAAS HARALD ,  SCHULZ BERNHARD ,  SCHMITT PETER ,  GLIETENBERG HELMUT

IPC: B01J27/138 ,  C07D311/72

Abstract: Preparation of alpha -tocopherol or alpha -tocopheryl acetate comprises reaction of 2,3,5-trimethylhydroquinone (TMH) with phytol or isophytol (IP) in the presence of a zinc halide condensation catalyst and a proton donor, optionally with a final esterification step using acetic anhydride. The reaction involves: (A) a water immiscible or poorly water-miscible non-polar solvent; and (B) 1-4 mole water per mole zinc halide.

公开(公告)号：DE19654038A1

公开(公告)日：1998-06-25

申请号：DE19654038

申请日：1996-12-23

Applicant: BASF AG

Inventor： BALDENIUS KAI-UWE ,  KAISER WULF ,  BOCKSTIEGEL BERNHARD ,  LAAS HARALD ,  SCHULZ BERNHARD ,  SCHMITT PETER ,  GLIETENBERG HELMUT

IPC: B01J27/138 ,  C07D311/72

Abstract: Preparation of alpha -tocopherol or alpha -tocopheryl acetate comprises reaction of 2,3,5-trimethylhydroquinone (TMH) with phytol or isophytol (IP) in the presence of zinc chloride and a proton donor in a water immiscible, or poorly water miscible, nonpolar solvent; and the product is optionally esterified with acetic anhydride. Either (1) the ZnCl2 is used in a mixture with 1-4 moles water per mole ZnCl2; or (2) at the end of reaction, the zinc chloride is separated, preferably by extraction with water or a water/low-boiling solvent mixture; and the zinc chloride solution (optionally concentrated to 60-90 wt.%), is partly or completely returned (optionally as a hot solution or pumpable mash) to the reaction mixture under conditions such that no more than 4 (preferably no more than 3) moles water per mole zinc chloride are available for subsequent reaction.