中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

17 records (took 0.022 seconds)

    PRODUCTION OF ALPHA-TOCOPHEROL OR ALPHA-TOCOPHERYL ACETATE
    1.
    发明专利
    PRODUCTION OF ALPHA-TOCOPHEROL OR ALPHA-TOCOPHERYL ACETATE 失效

    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.%.

    5.
    发明专利
    未知

    公开(公告)号：ES2138358T3

    公开(公告)日：2000-01-01

    申请号：ES96924819

    申请日：1996-06-29

    Applicant: BASF AG

    Inventor： BURST WOLFRAM ,  HARTMANN HORST ,  KAISER WULF ,  LAAS HARALD ,  GRAFEN PAUL ,  BOCKSTIEGEL BERNHARD

    IPC: B01D3/00 ,  B01D3/10 ,  B01D3/14 ,  B01D3/16 ,  B01D3/26 ,  B01D3/32 ,  B01D53/86 ,  B01D53/94 ,  B01J19/32 ,  B01J23/63 ,  B01J23/656 ,  B01J23/89 ,  C07C17/38 ,  C07D311/72

    Abstract: PCT No. PCT/EP96/02851 Sec. 371 Date Jan. 7, 1998 Sec. 102(e) Date Jan. 7, 1998 PCT Filed Jun. 29, 1996 PCT Pub. No. WO97/02890 PCT Pub. Date Jan. 30, 1997Packing elements with a low pressure drop for mass transfer column internals of the internal diameter of the column and of a height of from 40 to 300 mm made of dimensionally stable layers, which have an ordered structure and are in mutual contact, of cloth material or cloth-like material with a specific surface area of from 100 to 2000 m2/m3, wherein a) the shaped layers of cloth material or cloth-like material, preferably made of metal cloth, which are in mutual contact are arranged so that they form a multiplicity of narrow flow channels, preferably virtually triangular, virtually rectangular or else virtually equilateral hexagonal flow channels, in which the angle of inclination of the serration of the individual cloth layers of the packing to the column axis is only 0 to 25 DEG , preferably 3 to 14 DEG , and b) to ensure mechanical stability of the packing elements, if necessary wires or thin rods are fixed in suitable arrangement between the cloth layers, or else the cloth layers are firmly connected at some points of contact, and processes for obtaining pure substances from substance mixtures by rectification using the novel packing elements.

    6.
    发明专利
    未知

    公开(公告)号：DE19929367A1

    公开(公告)日：2000-12-28

    申请号：DE19929367

    申请日：1999-06-25

    Applicant: BASF AG

    Inventor： KLATT MARTIN JOCHEN ,  MUELLER THOMAS ,  BOCKSTIEGEL BERNHARD

    IPC: B01J31/22 ,  B01J31/18 ,  C07B61/00 ,  C07C45/34 ,  C07C49/603 ,  B01J31/12 ,  C07F13/00

    Abstract: The preparation of 3,5,5-trimethyl-cyclohex-2-ene-1,4-dione (I) by oxidation of 3,5,5-trimethyl-cyclohex-3-en-1-one (II) with molecular oxygen is catalyzed by a manganese salen complex (III). Preparation of 3,5,5-trimethyl-cyclohex-2-ene-1,4-dione (I) (i.e. oxoisophorone) involves oxidation of 3,5,5-trimethyl-cyclohex-3-en-1-one (II) (i.e. beta -isophorone) with molecular oxygen in presence of a solvent, a base and a manganese salen complex of formula (III) as catalyst. R = H or Cl; M = Mn(II) or Mn(III) .Cl .

    7.
    发明专利
    未知

    公开(公告)号：DE19840747A1

    公开(公告)日：2000-03-09

    申请号：DE19840747

    申请日：1998-09-07

    Applicant: BASF AG

    Inventor： OOST CARSTEN ,  STROEZEL MANFRED ,  ETZRODT HEINZ ,  WELLER DIETMAR ,  BOCKSTIEGEL BERNHARD ,  REIMER KLAUS ,  KAIBEL GERD ,  JAEDICKE HAGEN

    IPC: B01J31/14 ,  B01D3/00 ,  B01D3/14 ,  B01D3/32 ,  B01J10/00 ,  B01J19/24 ,  C07B61/00 ,  C07C45/67 ,  C07C45/68 ,  C07C45/82 ,  C07C49/203 ,  C07C67/54 ,  C07C69/72 ,  C07C45/65 ,  C07C49/255

    Abstract: Continuous production of 5-alken-2-one or 3,5-alkadien-2-one derivatives (I) by reacting a 1-alken-3-ol or 1-alkyn-3-ol derivative (II) with an alkyl acetoacetate (III) in a fractionation column to form an acetoacetate and alcohol involves (i) removing the alcohol and (ii) contacting the acetoacetate with catalyst in the lower part or bottom of the column to form (I). Continuous production of unsaturated ketones of formula (I) by reacting an unsaturated alcohol of formula (II) with an alkyl acetoacetate of formula (III) in the presence of an organoaluminum catalyst is carried out by: (a) reacting (II) with (III) on the plates of a fractionation column to form the acetoacetate of (II) and an alcohol of formula R OH; (b) removing the alcohol in the overhead stream from the column; (c) contacting the acetoacetate of (II) with the catalyst in the lower part or bottom of the column to form (I) and CO2; (d) removing the CO2 in the overhead stream from the column; and (e) withdrawing (I) in the bottoms stream from the column. R = 1-4C alkyl; R = 1-37C (un)saturated aliphatic hydrocarbyl (optionally substituted by methoxy groups), 4-12C cycloalkyl or 5-30C cycloalkylalkyl; and R = 1-5C alkyl.

    10.
    发明专利
    未知

    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.

Patent Agency Ranking