中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

272 records (took 0.037 seconds)

    METHOD FOR DISTILLING MIXTURES CONTAINING BUTANEDIOL
    51.
    发明专利
    METHOD FOR DISTILLING MIXTURES CONTAINING BUTANEDIOL 未知

    公开(公告)号：CA2322746A1

    公开(公告)日：1999-09-10

    申请号：CA2322746

    申请日：1999-02-26

    Applicant: BASF AG

    Inventor： PINKOS ROLF ,  FISCHER ROLF ,  LIANG SHELUE

    IPC: C07C29/149 ,  C07C29/80 ,  C07C31/20 ,  C07C45/82 ,  C07C47/19 ,  C07D307/20

    Abstract: The invention relates to a method for separating a mixture containing butane1,4-diol and at least one other compound from the following group: 4hydroxybutyraldehyde, its cyclical hemiacetal and its cyclical whole acetals with at least one other alcohol, by distillation. The distillation is carried out in the presence of a compound which acts as an alkali. The mixture to be separated preferably contains a cyclical whole acetal of 4hydroxybutyraldehyde with the other alcohol, this alcohol having a lower boiling temperature than butanediol and being in free form. The method is especially suitable for distilling and separating mixtures produced in the hydrogenation of maleic acid derivatives.

    METHOD FOR PRODUCING 1,6-HEXANEDIOL
    52.
    发明专利
    METHOD FOR PRODUCING 1,6-HEXANEDIOL 未知

    公开(公告)号：CA2305590A1

    公开(公告)日：1999-07-08

    申请号：CA2305590

    申请日：1998-12-10

    Applicant: BASF AG

    Inventor： BREITSCHEIDEL BORIS ,  PINKOS ROLF ,  FISCHER ROLF HARTMUTH ,  STEIN FRANK ,  LIANG SHELUE

    IPC: C07B61/00 ,  C07C29/149 ,  C07C31/20

    Abstract: The invention relates to a method for producing 1,6-hexanediol by hydrogenating adipic acid esters and/or 6-hydroxycarboxylic acid esters in the gaseous phase at an elevated temperature and pressure in the present of chromium-free catalysts. Hydrogenation is carried out a) using catalysts containing copper, manganese and aluminium as essential constituents or in the presence of Raney copper; b) at temperatures of between 150 and 230 ~C and pressures of between 10 and 70 bar; c) at a molar ratio of hyrogen to hydrogenating ester of between 150 to 1 and 300 to 1; and d) at a catalyst load of between 0.01 and 0.3 kg C3-ester per litre of catalyst and hour.

    56.
    发明专利
    未知

    公开(公告)号：DE59503924D1

    公开(公告)日：1998-11-19

    申请号：DE59503924

    申请日：1995-01-12

    Applicant: BASF AG

    Inventor： KANAND JUERGEN ,  ROEPER MICHAEL ,  PINKOS ROLF ,  PACIELLO ROCCO ,  THOME ALFRED

    IPC: B01J21/16 ,  B01J27/18 ,  B01J29/06 ,  C07B61/00 ,  C07C27/00 ,  C07C29/17 ,  C07C31/12 ,  C07C41/06 ,  C07C41/32 ,  C07C43/15 ,  C07C45/51 ,  C07C47/02

    Abstract: PCT No. PCT/EP94/00114 Sec. 371 Date Jul. 12, 1996 Sec. 102(e) Date Jul. 12, 1996 PCT Filed Jan. 12, 1995 PCT Pub. No. WO95/19334 PCT Pub. Date Jul. 20, 1995A process for the preparation of n-butyraldehyde and/or n-butanol, wherein a) 1,3-butadiene is caused to react with an alcohol of the formula IROHI, to form a mixture of adducts of the formulas II II and III III b) the adduct III is isomerized to the adduct II, c) the adduct II is isomerized in the presence of a homogeneous or heterogeneous transition metal element catalyst to form the enol ether of the formula IV IV and d) n-butyraldehyde and/or n-butanol is/are produced from this ether IV by the reaction thereof with hydrogen and water or water only in the presence of a homogeneous or heterogeneous catalyst.

    PROCESS FOR PREPARING 1,6 HEXANE DIOL WITH A LEVEL OF PURITY OVER 99 %
    59.
    发明专利
    PROCESS FOR PREPARING 1,6 HEXANE DIOL WITH A LEVEL OF PURITY OVER 99 % 未知

    公开(公告)号：CA2247991A1

    公开(公告)日：1997-09-04

    申请号：CA2247991

    申请日：1997-02-28

    Applicant: BASF AG

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

    IPC: C07C29/149 ,  C07C31/20

    Abstract: The invention relates to a process for the preparation of 1,6 hexane diol from a carboxylic acid mixture containing adipic acid, 6-hydroxy caproic acid and, in small quantities, 1,4 cyclohexane diols. Said mixture is obtained as a byproduct of the oxidation of cyclohexane into cyclohexanone/ cyclohexanol by water extraction of the reaction mixture. Said process involves esterification of the acids and hydrogenation. According to this process (a) the monocarboxylic acids and the dicarboxylic acids contained in the aqueous dicarboxylic acid mixture are reacted with a low-molecular alcohol to form the corresponding carboxylic acid esters; (b) the excess alcohol and low-boiling agents of the resultant esterification mixture are released in a first distillation stage; (c) separating into an ester fraction substantially free of 1,4 cyclohexane diols and a fraction containing at least the greater part of the 1,4 cyclohexane diols is carried out from the bottom product in a second distillation stage; (d) the ester fraction substantially free of 1,4 cyclohexane diols is catalytically hydrogenated; and (e) in a pure distillation stage 1,6 hexane diol is extracted from the hydrogenated discharge in a known manner.

Patent Agency Ranking