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    Purification of aliphatic dinitriles
    13.
    发明专利
    Purification of aliphatic dinitriles 未知

    公开(公告)号：GB917788A

    公开(公告)日：1963-02-06

    申请号：GB4241260

    申请日：1960-12-09

    Applicant: BASF AG

    Inventor： ADAM KARL ,  AREND WOLFGANG ,  FRICK REINHOLD ,  HAAS HANS

    Abstract: Aliphatic dinitriles containing from 4 to 22 carbon atoms and having at least two carbon atoms between the nitrile groups are purified by heating with water and a neutral salt of ammonia or an amine. A suitable temperature range is 50 DEG to 200 DEG C. The water is preferably present in an amount which is 1 to 20% by weight of the dinitrile, and the neutral salt is preferably present in an amount which is 0.01 to 10% by weight of the dinitrile. Dinitriles exemplified are adipodinitrile, suberodinitrile, sebacodinitrile and mixtures of 1,9- and 1,10-dicyanoheptadecanes. After heating, the mixture of dinitrile, neutral salt and water may be subjected to distillation. The process may be adapted to both continuous and discontinuous operation.

    14.
    发明专利
    未知

    公开(公告)号：FR1272896A

    公开(公告)日：1961-09-29

    申请号：FR843174

    申请日：1960-11-07

    Applicant: BASF AG

    Inventor： ADAM KARL ,  AREND WOLFGANG ,  FRICK REINHOLD ,  HAAS HANS

    IPC: C07C253/34 ,  C07C255/45

    Abstract: Aliphatic dinitriles containing 4-22 carbon atoms, having at least 2 carbon atoms between the nitrile groups, and having, apart from the nitrile groups, a hydrocarbon structure, are purified by bringing them in the presence of water into contact with an alkali metal bisulphate, ammonium bisulphate, an ammonium bisulphate N-substituted by 1-3 alkyl groups having 1-4 carbon atoms, or a bisulphate of a divalent metal which does not form a sulphate which is difficulty soluble in water, e.g. iron, manganese, zinc, cobalt and nickel. The amount of water is preferably 3-8% by weight of dinitrile, and the amount of bisulphate preferably 0.01-10% by weight of dinitrile. Specified dinitriles are adipodinitrile, suberodinitrile, sebacodinitrile and the mixture of 1.9- and 1,10-dicyanoheptadecane known as heptadecane dicarboxylic acid dinitrile. The temperature may be from the solidification point of the dinitrile to 200 DEG C. or more. The purified dinitriles may be reduced to the corresponding diamines.

    Production of polymers containing cyano groups
    16.
    发明专利
    Production of polymers containing cyano groups 未知

    公开(公告)号：GB1116933A

    公开(公告)日：1968-06-12

    申请号：GB4373665

    申请日：1965-10-15

    Applicant: BASF AG

    Inventor： VOLLMERT BRUNO ,  HAAS HANS

    IPC: C08F20/34 ,  C08F22/22

    Abstract: Polymers having low glass temperatures are prepared by homopolymerizing or copolymerizing an ester of an ethylenically unsaturated carboxylic acid and an alcohol of the formula NC-(CH2)n-OH wherein n is an integer of from 4 to 8. The acid component of the cyanoalkyl ester may be, for example, acrylic, methacrylic, a -chloroacrylic, a -cyanoacrylic, itaconic, citraconic, maleic or fumaric acid. Mixtures of the cyano-esters may be used, e.g. a mixture of the d -cyano-butyl esters of acrylic and methacrylic acids. Comonomers for the cyano-esters include other esters of the acids mentioned above and also nitriles and amides of such acids, vinyl esters, vinyl aromatic compounds, olefins, dienes, vinyl and vinylidene halides, and heterocyclic compounds containing vinyl groups. Polymerization may be effected in bulk, suspension, emulsion or solution using initiators such as peroxides or azo compounds. The polymers can be used for the production of mouldings, sheets, films, lacquer coatings, laminates and impregnations. Examples illustrate the polymerization of (a) d -cyanobutyl acrylate, and (b) d -cyanobutyl acrylate and n-butyl acrylate in acetone using azodiisobutyronitrile initiator, the copolymerization of (b) being effected in the additional presence of dodecyl mercaptan and triphenyl phosphate; another example illustrates the polymerization of d -cyanobutyl acrylate or methacrylate, together with butadiene, in aqueous emulsion at pH 9, containing an alkyl sulphonate and sodium tripolyphosphate, and in the presence of potassium persulphate initiator to produce an elastomeric spongy product.

    MANUFACTURE OF CONCENTRATED AQUEOUS SOLUTIONS OF FORMALDEHYDE
    19.
    发明专利
    MANUFACTURE OF CONCENTRATED AQUEOUS SOLUTIONS OF FORMALDEHYDE 未知

    公开(公告)号：CA1058221A

    公开(公告)日：1979-07-10

    申请号：CA235507

    申请日：1975-09-11

    Applicant: BASF AG

    Inventor： AICHER ALBRECHT ,  HAAS HANS ,  DIEM HANS ,  DUDECK CHRISTIAN ,  BRUNNMUELLER FRITZ ,  LEHMANN GUNTER

    IPC: C07B61/00 ,  C07C45/00 ,  C07C45/38 ,  C07C45/78 ,  C07C47/055 ,  C07C47/058 ,  C07C67/00 ,  C07C47/04

    Abstract: Concentrated aqueous solutions of formaldehyde are manufactured by the oxidative dehydrogenation of methanol with air in the presence of a silver crystal catalyst bed and of steam, at a temperature from 550 to 780.degree.C, followed by absorption, in water, of the formaldehyde formed. According to the invention, the reaction is carried out with a throughput of from 1 to 3 tonnes of methanol per square meter of catalyst bed cross-section per hour in the presence of from 0.1 to 1.8 moles of water and from 0.04 to 0.4 mole of formaldehyde per mole of total methanol fed to the catalyst, the formaldehyde and from 0.1 to 1.8 moles of water per mole of total methanol fed to the catalyst are taken from the reaction mixture after the reaction and added to the starting mixture, and (a) a part of the formaldehyde and water is abstracted from the formaldehyde solution, formed in the absorption stage, by means of the air fed to the reaction, at from 60 to 90.degree.C, or (b) a part of the formaldehyde solution formed in the absorption stage is vaporized and recycled to the reaction, or (c) simultaneously a part of the formaldehyde and water is abstracted from the formaldehyde solution, formed in the absorption stage, by the air fed to the reaction, at from 60 to 90.degree.C, and a part of the formaldehyde solution formed in the absorption stage is vaporized and recycled to the reaction. The formaldehyde solution obtained by this process may be used as a disinfectant, tanning agent, reducing agent and starting material for the manufacture of synthetic resins, adhesives and plastics.

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