中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.019 seconds)

    CONCENTRATION, SEPARATION AND PURIFICATION OF AROMATIC COMPOUND
    3.
    发明专利
    CONCENTRATION, SEPARATION AND PURIFICATION OF AROMATIC COMPOUND 失效

    公开(公告)号：JP2000063293A

    公开(公告)日：2000-02-29

    申请号：JP22009699

    申请日：1999-08-03

    Applicant: DEGUSSA

    Inventor： BERGER RALF ,  KRINGS ULRICH DR ,  LATZA ELKE ,  TREFFENFELDT WILTRUD ,  VOLLMER HELGA DR ,  PREUSS ANDREA DR

    IPC: C07B63/00 ,  C07C7/13 ,  C07C13/20 ,  C07C45/79 ,  C07C67/56 ,  C07C69/24 ,  C11B9/02

    Abstract: PROBLEM TO BE SOLVED: To concentrate, separate and purify aromatic compounds free from the contamination of a solvent or having a yield loss by bringing a solution of aromatic compounds into contact with an acidic zeolite having a specific coefficient of elasticity, absorption-separating the supernatant liquid, and desorbing the absorbed substance. SOLUTION: A solution of aromatic compounds including an aqueous solution and/or an organic solvent is brought into contact with an acidic zeolite (e.g.; DAY, ZSM-5 or ZSM-5 type zeolite treated to remove aluminum or the like) having 28 to 1000 of coefficient of elasticity in one or more times, separating the supernatant liquid including one or more compounds not absorbed or not including an undesirable compound, desorbing the absorbed substance from the adsorbent by utilizing a solvent, to concentrate, separate and purify the aromatic compounds. This method is especially suitable for separation of limonene and carvone.

    SEPARATION OF TETRAHYDROPYRIMIDINE DERIVATIVE
    4.
    发明专利
    SEPARATION OF TETRAHYDROPYRIMIDINE DERIVATIVE 失效

    公开(公告)号：JPH11349574A

    公开(公告)日：1999-12-21

    申请号：JP13297499

    申请日：1999-05-13

    Applicant: DEGUSSA

    Inventor： KARAU ANDREAS DR ,  TREFFENFELDT WILTRUD ,  PREUSS ANDREA DR ,  STOCKHAMMER STEFAN

    IPC: B01D61/04 ,  B01D61/16 ,  C07B63/00 ,  C07D239/06

    Abstract: PROBLEM TO BE SOLVED: To separate a tetrahydropyrimidine presenting in an aqueous solution from a corresponding hydroxy compound. SOLUTION: This method for separating a tetrahydropyrimidine presenting in an aqueous solution from a corresponding hydroxy compound, is provided by bringing the aqueous solution of the above compound into contact with an acidic zeolite having 15-1,000 modulus at 1.0-7.0 pH value, separating a supernatant containing the hydroxy compound preferentially after the completion of an adsorption, and also desorbing the absorbed derivative from the zeolite with an aqueous solution adjusted to have >pH 8.0 and mixed with a basic organic component as necessary. Thereby, a selective method for separating the tetrahydropyrimidine from its aqueous solution effectively is attained.

    TREATMENT OF WASTE WATER
    5.
    发明专利
    TREATMENT OF WASTE WATER 失效

    公开(公告)号：JP2001009479A

    公开(公告)日：2001-01-16

    申请号：JP2000164805

    申请日：2000-06-01

    Applicant: DEGUSSA

    Inventor： FINKELDEI CASPAR-HEINRICH ,  PREUSS ANDREA DR ,  WOYCIECHOWSKI MATTHIAS ,  HASENZAHL STEFFEN DR

    IPC: B01J29/89 ,  C02F1/72

    Abstract: PROBLEM TO BE SOLVED: To avoid the salting out of waste water when a Fenton reagent is used and to make the nonspecific consumption of H2O2 as low as possible by treating the waste water with a hydroxyl group forming body such as hydrogen peroxide in the presence of a titanium-containing silicate as a catalyst. SOLUTION: A microporous or mesoporous titanium-containing metallic silicate, preferably titanium silicalite-1 is used as a catalyst in the form of powder at 0.05-100 g/l, preferably 0.5-10 g/l concentration and/or in the form of formings such as granules, extruded bodies or beads. Waste water is treated with a hydroxyl group forming body such as hydrogen peroxide in the presence of the titanium-containing silicate. The treatment is carried out under relatively mild reaction conditions of pH 2-9, preferably 6.0-8.0 and a temperature between the freezing and boiling points, preferably 15-40 deg.C.

    SEPARATION AND PURIFICATION OF PYRIMIDINE DERIVATIVE
    6.
    发明专利
    SEPARATION AND PURIFICATION OF PYRIMIDINE DERIVATIVE 失效

    公开(公告)号：JPH10265462A

    公开(公告)日：1998-10-06

    申请号：JP6557898

    申请日：1998-03-16

    Applicant: DEGUSSA

    Inventor： STOCKHAMMER STEFAN ,  TREFFENFELDT WILTRUD ,  PREUSS ANDREA DR

    IPC: C07B63/00 ,  C07D239/06

    Abstract: PROBLEM TO BE SOLVED: To obtain the subject derivative having a wide application range in medical and cosmetic fields without requiring multistage and extreme time by bringing a pyrimidine derivative into contact with an acidic zeolite. SOLUTION: This method for separating and purifying (A) a pyrimidine derivative from (B) an aqueous solution thereof comprises a step for bringing the component B into contact with (C) an acidic zeolite having pH value of 1.0-7.0 and 15-1,000 module, desorbing the adsorbed component A by using an aqueous solution optionally regulated so as to have pH>8.0 by adding a basic organic component to recover the objective component A. Further, 2methyl-1,4, 5,6-tetrahydropyrimidine-4carboxylic acid (ectoine) of the formula (R is H or OH) is preferably separated from the aqueous solution, especially fermented solution.

Patent Agency Ranking