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    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.%.

    4.
    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.

    8.
    发明专利
    未知

    公开(公告)号：DE19810671A1

    公开(公告)日：1999-09-16

    申请号：DE19810671

    申请日：1998-03-12

    Applicant: BASF AG

    Inventor： RUFF DETLEF ,  BURST WOLFRAM ,  KAISER WULF ,  STROEZEL MANFRED

    IPC: C07C45/72 ,  C07C45/74 ,  C07C49/603 ,  C07C49/543 ,  C07C45/68 ,  C07C45/45

    Abstract: 2,5,6-trimethyl-cyclohex-2-en-1-one (I) is prepared by continuously pumping diethylketone (II), crotonaldehyde (III) and an aqueous strong base through a pressure vessel in such a fashion that the reaction temperature is 150-350 degrees C and the average residence time in the pressure vessel is only 0.1 seconds to 20 minutes. Preparation of 2,5,6-trimethyl-cyclohex-2-en-1-one (I) comprises reaction of (i) diethylketone (II) with (ii) crotonaldehyde (III) (or a compound which is converted to (III) under the selected reaction conditions), in the presence of basic agents, at elevated temperatures. Component (ii) (1 mol), component (i) (5-30 mol) and an aqueous solution or suspension of a strong base are pumped continuously, via separate supply points or in the form of a mixture, into an optionally heated pressure vessel which can guarantee intensive mixing. The components are pumped to the vessel in such a fashion that the reaction temperature is 150-350 degrees C and the average residence time in the pressure vessel is only 0.1 seconds to 20 minutes.

    9.
    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.

    10.
    发明专利
    未知

    公开(公告)号：DE10026135A1

    公开(公告)日：2001-11-29

    申请号：DE10026135

    申请日：2000-05-26

    Applicant: BASF AG

    Inventor： KAISER WULF ,  SCHMITT ROLF

    IPC: B01D3/22 ,  B01D3/16 ,  C10G9/18 ,  C10G19/02 ,  C10G19/08 ,  C10G53/12 ,  C10G55/04 ,  C10G70/06

    Abstract: Removing hydrocarbons from the waste liquor of the alkali wash in plants for splitting saturated hydrocarbons comprises counter-currently contacting the waste liquor in a cascading plate column (20) with a stripping gas which absorbs the hydrocarbons. An Independent claim is also included for an apparatus for removing hydrocarbons from the waste liquor of the alkali wash in plants for splitting saturated hydrocarbons. Preferred Features: The waste liquor is fed into the column via bent cascade plates (21). The stripping gas is a fuel gas containing methane. Long chain hydrocarbons such as C5+-hydrocarbons and aromatics such as benzene are removed.

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