中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

12 records (took 0.02 seconds)

    CYANURIC ACID
    3.
    发明专利
    CYANURIC ACID 未知

    公开(公告)号：AU6376973A

    公开(公告)日：1975-06-19

    申请号：AU6376973

    申请日：1973-12-19

    Applicant: BASF AG

    Inventor： SUTER HUBERT ,  ERDEN KARL VON ,  FUCHS HARTWIG ,  BILLET REINHARD ,  GOELZ HORST

    IPC: C07D251/32 ,  C07C20060101 ,  C07D55/36

    Abstract: A process for the production of cyanuric acid in which urea and an inert solvent are passed into a reaction zone in which pyrolysis of the urea with the formation of cyanuric acid takes place at 200 DEG to 300 DEG C, from 50 to 760 mm and a space-time yield of from 0.1 to 2 kg of cyanuric acid per liter of reaction volume per hour, and the cyanuric acid is separated in a crystal separation zone and freed from solvent in a falling film evaporator.

    Continuous production of ª‰-chloroethane sulphochloride
    7.
    发明专利
    Continuous production of ª‰-chloroethane sulphochloride 未知

    公开(公告)号：GB964235A

    公开(公告)日：1964-07-22

    申请号：GB4036662

    申请日：1962-10-25

    Applicant: BASF AG

    Inventor： SCHLECHT HELMUT ,  GOELZ HORST

    IPC: C07C303/10 ,  C07C309/80

    Abstract: A process for continuous production of b -chloroethane sulphochloride comprises continuously passing ethyl chloride, sulphur dioxide and chlorine into a mixture of b -chloroethane sulphochloride, 1,1-dichloroethane, ethyl chloride and sulphur dioxide, and irradiating the mixture, then fractionally distilling it, unreacted materials being returned to the reactor. Suitable radiation is provided by an incandescent lamp of high luminous intensity, a mercury vapour lamp, or any other source of actinic radiation. The initial mixture preferably contains at least 20% of product in order to facilitate solution of sulphur dioxide. The chlorine is supplied in amount such that it is completely used up during irradiation. Reaction temperatures are preferably between -10 and +10 DEG C. An example gives details of the process, in which the mixture is circulated through vertical and horizontal tubes, the sulphur dioxide and ethyl chloride being introduced into the bottom of the upward limb, the chlorine a little higher, all dissolving completely before being irradiated with UV light. After irradiation, hydrogen chloride is removed from the top of the apparatus, and excess sulphur dioxide and ethyl chloride separated and returned to the reactor. Reaction mixture is removed at a rate corresponding to the input of reactants, and is fractionally distilled, sulphur dioxide and ethyl chloride and any 1,1-dichloroethane being returned to the circulating liquid.

    Improvements in the production of polyesters of carbonic acid
    8.
    发明专利
    Improvements in the production of polyesters of carbonic acid 未知

    公开(公告)号：GB843314A

    公开(公告)日：1960-08-04

    申请号：GB1135358

    申请日：1958-04-10

    Applicant: BASF AG

    Inventor： GOELZ HORST ,  MEYER FERDINAND

    IPC: C08G64/16

    Abstract: Regular copolycarbonates are made by reacting a bis-chlorocarbonic acid ester of a diol with a dihydric phenol in aqueous alkaline medium, preferably sodium or potassium hydroxide solution. Specified diols are ethylene glycol, 1,4-butane diol, 1,6-hexane diol, 2,5-hexane diol, 1,8-octane diol, hexahydrohydroquinone, dimethylolcyclohexane, p.p1-dimethylol dicyclohexyl, p.p1-dimethyllol dicyclohexyl-sulphide, -sulphone or -ether, terphthalic alcohol, p.p.1 -dimethyloldiphenyl, p.p1-dimethyloldiphenylmethane,-propane, -sulphide, -sulphone orether, di-(hydroxyethoxy)-diphenylmethane, bis(hydroxyethyl-4-oxyphenyl)-dimethyl methane, 1,4-hexene-diol, butine-diol and hexadi-inediol. Specified dihydric phenols are hydroquinone, resorcinol, pyrocatechol, 4,41-dihydroxdiphenyl sulphone, (4,41-dihydroxydiphenyl)-methane, 1,1-(4,41-dihydroxydiphenyl)-cyclohexane, 3,4-(4,41-dihydroxydiphenyl-hexane, 2,2-(4,41-dihydroxydiphenyl)-propane, 1,1-(4,4-dihydroxydiphenyl)-1-phenylethane, 2,2-(2,21-dihydroxy4.41-ditertiary butyldiphenyl)-propane and 1,1-(4,41-dihydroxy-3,31-dimethyloldiphenyl) -cyclohexane. The reaction may be effected in the presence of an inert organic liquid which dissolves the polycarbonate e.g. hexane, octane, petroleum ether, gasoline, benzene, toluene, tylene, cyclohexane, methylene chloride, ethylene chloride, tetrachloroethene, chloroform dichlorobutane or chlorobenzene. Catalyst for the reaction are tertiary amines and quarternary ammonium salts. The polycarbonates are suitable for the manufacture of foils, films and threads. Examples describe the manufacture of poly-carbonates from (1) bis(4-hydroxyphenyl)-dimethylmethane and the bischlorocarbonate of 1,4-butane diol (2) hydroquinone and the bis-chlorocarbonate of 1,6-hexane diol; (4), (5), (7) and (8) (4,41-dihydroxydiphenyl)-dimethylmethane and the bis-chlorocarbonates of 1,6-hexane diol, di-hydroxyethylated (4,41-dihydroxydiphenyl)-dimethyl methane, butene-diol or cyclohexanediol-1,4; (6) (4,41-dihydroxydiphenyl)-methane, 4,41-dihydroxydiphenylsulphone and the bischlorocarbonate of 1,4-butane diol. Specifications 772,627, 808,485, 808,486 and 808,487 are referred to.

    CONTINUOUS PRODUCTION OF CYANURIC ACID
    9.
    发明专利
    CONTINUOUS PRODUCTION OF CYANURIC ACID 未知

    公开(公告)号：CA982130A

    公开(公告)日：1976-01-20

    申请号：CA188563

    申请日：1973-12-19

    Applicant: BASF AG

    Inventor： FUCHS HARTWIG ,  SUTER HERBERT ,  BILLET REINHARD ,  GOELZ HORST ,  VON ERDEN KARL

    IPC: C07D251/32 ,  C07C20060101

    Abstract: A process for the production of cyanuric acid in which urea and an inert solvent are passed into a reaction zone in which pyrolysis of the urea with the formation of cyanuric acid takes place at 200 DEG to 300 DEG C, from 50 to 760 mm and a space-time yield of from 0.1 to 2 kg of cyanuric acid per liter of reaction volume per hour, and the cyanuric acid is separated in a crystal separation zone and freed from solvent in a falling film evaporator.

Patent Agency Ranking