中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

27 records (took 0.022 seconds)

    13.
    发明专利
    未知

    公开(公告)号：AT246120B

    公开(公告)日：1966-04-12

    申请号：AT465564

    申请日：1964-05-29

    Applicant: BASF AG

    Inventor： NOHE HEINZ DR ,  PALM CHRISTOF DR ,  PLATZ ROLF DR

    IPC: B01J23/28 ,  C07C20060101 ,  F25D17/04 ,  F25D23/06

    Abstract: In a process for the preparation of acrylonitrile and methacrylonitrile by the oxidation of propylene or isobutylene with oxygen or gases containing oxygen in the presence of ammonia at an elevated temperature, a tin salt of a boromolybdate heteropoly acid on a carrier is used as a catalyst. The weight ratio of stannic oxide to molybdenum oxide is from 10:1 to 1:10, and of boron oxide to molybdenum oxide is from 1:5 to 1:20. and the preferred carrier is silica gel. The catalyst may be prepared by impregnating the carrier with solutions of tin, boron and molybdenum salts, or by coprecipitation of silica gel and tin, boron, molybdate, followed by drying, and the use of a fluidized bed method is preferred.ALSO:Aminoxidation catalyst comprise tin salts of a boromolybdate heteropoly acid supported on a carrier. The weight ratio of stannic oxide to molybdenum oxide is from 10:1 to 1:10, and of boron oxide to molybdenum oxide is from 1:2 to 1:50 and silica gel is preferred as the carrier. The carrier may be impregnated with suitable solutions of tin, boron, molybdenum salts and dyed, silica-gel may be co-precipitated with tin boron molybdate, or the tin salt of boromolybdic acid may be applied in molten form preferably in the presence of a flux e.g. urea or oxalic acid. The particle size is determined by spraying, extrusion or by grinding. In examples of catalyst preparation, boric acid is added to ammonium molybdate solution followed by stannous chloride solution, the solution made alkaline with ammonia, and silica gel kneaded is followed by dying and annealing; ammonium molybdate and boric acid solution is stirred into silica sol and during heating and mixing an acetic acid solution of stannous oxide is flowed in, the mixture is evaporated and calcined.

    15.
    发明专利
    未知

    公开(公告)号：DE4325023A1

    公开(公告)日：1995-02-02

    申请号：DE4325023

    申请日：1993-07-26

    Applicant: BASF AG

    Inventor： BECKER RAINER DR ,  HUELLMANN MICHAEL DR ,  PALM CHRISTOF DR ,  FRANZISCHKA WOLFGANG DR

    IPC: C08G65/06 ,  C08G65/02 ,  C08G65/10 ,  C08G65/20 ,  C08G65/26

    Abstract: A process for the preparation of polytetrahydrofuran or C2- to C10-alkylene oxide-tetrahydrofuran copolymers having a mean molecular weight of from 250 to 20000 daltons by cationic polymerisation of tetrahydrofuran or tetrahydrofuran and C2- to C10-alkylene oxides in the presence of a promoter, in which process the catalyst used is a mixture of one or more C2- to C6-di- or tricarboxylic acids with boric acid.

    17.
    发明专利
    未知

    公开(公告)号：DE3861445D1

    公开(公告)日：1991-02-07

    申请号：DE3861445

    申请日：1988-08-04

    Applicant: BASF AG

    Inventor： PALM CHRISTOF DR ,  HUCHLER OTTO HERMANN DR ,  PESSEL ULRICH-DIETER ,  HOLLBORN ERDMANN ,  SCHMITT DIETER DR

    IPC: C07D307/08

    Abstract: Crude water-containing tetrahydrofuran is purified by distillation by a process in which the crude tetrahydrofuran is passed through three distillation columns, water being removed from the bottom of the first column, water-containing tetrahydrofuran being recycled from the top of the second column into the first column, the top product of the third column being recycled to the first column, a distillate being removed at the top of the first column, and pure tetrahydrofuran being distilled off from the bottom product of the second column, in the third column, and the pure tetrahydrofuran being removed from the side take-off of the third column.

    20.
    发明专利
    未知

    公开(公告)号：AT260893B

    公开(公告)日：1968-03-25

    申请号：AT686965

    申请日：1965-07-26

    Applicant: BASF AG

    Inventor： PALM CHRISTOF DR ,  PLATZ ROLF DR ,  NOHE HEINZ DR

    IPC: B01J23/28

    Abstract: Acrylonitrile (or methacrylonitrile) from propylene (or isobutylene) is made by ammoxidation at elevated temperature using supported catalysts containing MoO3 and SuO2 and optionally BrO3, the catalyst having been prepared by impregnating the carrier with a solution of the metal oxides on the corresponding sulphates in conc. H2SO4, followed by drying. Examples describe the passage of gaseous mixtures of olefine + oxygen + ammonia + nitrogen and/or steam over suitably prepared catalysts at 480-500 DEG C.ALSO:Catalysts of MoO3, SuO2 \sB B2O3 on a carrier are made by impregnation using solutions of oxides or sulphates in concentrated H2So4. Preferred carrier is SiO2, but Al2O3, SiC, diatomaceous earth and pumice are also mentioned. Particle sizes and bulk density data are given.

Patent Agency Ranking