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    Production of oximes of cycloaliphatic ketones
    31.
    发明专利
    Production of oximes of cycloaliphatic ketones 未知

    公开(公告)号：GB972107A

    公开(公告)日：1964-10-07

    申请号：GB3322263

    申请日：1963-08-22

    Applicant: BASF AG

    Inventor： DOERFEL HELMUT ,  RAFF PAUL

    Abstract: A process for the production of oximes of cycloaliphatic ketones having at least 12 carbon atoms by action of hydroxylamine on the ketone in an aqueous heterogeneous reaction mixture is effected at an elevated temperature (e.g. 50-150 DEG C.) and at pH 6-14, and is further characterized by the requirement that the aqueous phase contains at least 10% wt. of salt after the reaction is over. A water-immiscible inert solvent b.p. above 10 DEG C. may be present during the reaction or an inert solvent may be added after the reaction to dissolve the oxime formed. U.S.A. Specifications 2,270,204, 2,756,258, 2,820,825, German Specifications 857,375, 888,693, 1,081,884 and 1,042,575 are referred to.

    MANUFACTURE OF POLYAMIDES
    32.
    发明专利
    MANUFACTURE OF POLYAMIDES 未知

    公开(公告)号：CA1056991A

    公开(公告)日：1979-06-19

    申请号：CA234355

    申请日：1975-08-26

    Applicant: BASF AG

    Inventor： DOERFEL HELMUT ,  CORDES CLAUS

    IPC: C08G69/00 ,  C08G69/04 ,  C08G69/16 ,  C08G69/24

    Abstract: A process for continuous production of polyamides by continuous transport of a mixture or one or more lactams and from 1 to 15% and preferably from 3 to 8% of water and optionally other polyamide-forming compounds such as the salts of dicarboxylic acids and diamines or aminocarboxylic acids through a number of reaction zones under polyamide-forming conditions, said mixture of starting materials being heated in a first reaction zone to temperatures of from 210.degree. to 330.degree.C and preferably from 220.degree. to 280.degree.C, whereupon the polycondensation mixture is adiabatically vented in a further reaction zone and is then polymerized to completion in yet another reaction stage to form high molecular weight polyamides. The process is characterized in that(a) the mixture of starting materials is heated in the first reaction zone at pressures which are above the respective vapor pressures of the starting materials and prevent the formation of a vapor phase, said heating being effected for from 5 minutes to 2 hours and preferably from 10 minutes to 1 hour until a conversion of at least 70% and preferably 80% has been reached;(b) the polycondensation mixture is vented in the second zone to pressures of from 1 to 11 bars and preferably from 1 to 6 bars and is then immediately heated in a third reaction zone, preferably together with the steam formed during adiabatic venting, with the application of heat and evaporation of the major portion of the water at the said pressure obtained by venting or a lower pressure, said heating being carried out for less than 10 minutes and preferably less than 5 minutes at temperatures of from 250.degree. to 350.degree.C and preferably from 260.degree. to 280.degree.C, whereupon(c) the polymerization mixture is separated from the steam in a fourth reaction zone and is polymerized to completion in a further reaction stage to form high molecular weight polyamides.

    Production of completely transparent polyamides
    38.
    发明专利
    Production of completely transparent polyamides 未知

    公开(公告)号：GB1135472A

    公开(公告)日：1968-12-04

    申请号：GB1325266

    申请日：1966-03-25

    Applicant: BASF AG

    Inventor： BECHT GUENTER ,  DOERFEL HELMUT ,  RAFF PAUL ,  SCHUSTER LUDWIG

    IPC: C08G69/26

    Abstract: 1,135,472. Tetrahydrotricyclopentadiene diamine. BADISCHE ANILIN- & SODAFABRIK A.G. 25 March, 1966 [27 March, 1965], No. 13252/66. Heading C2C. [Also in Division C3] Tetrahydrotricyclopentadiene diamine is prepared from tricyclopentadiene by injecting the molten hydrocarbon into a mixture of HCN and H 2 SO 4 , adding water, distilling off any excess HCN, adding NaOH, extracting with cyclooctylamine, adding benzene, washing with water and distilling.

    Purification of pyrrolidone-(2)
    40.
    发明专利
    Purification of pyrrolidone-(2) 未知

    公开(公告)号：GB1092630A

    公开(公告)日：1967-11-29

    申请号：GB4823064

    申请日：1964-11-27

    Applicant: BASF AG

    Inventor： DOERFEL HELMUT

    IPC: C07D201/16 ,  C08G69/24

    Abstract: Polypyrrolidone is obtained from technical grade pyrrolidone (2) containing for example 0.2-0.4% by weight of impurities, e.g. 0.02% butyrolactone, 0.07% water, some g -pyrrolidylbutyramide and further impurities, by first recrystallizing from an aliphatic alcohol or ketone (see Division C2). The pyrrolidone is polymerized in cyclohexane in the presence of adipoyldipyrrolidone.ALSO:Pyrrolidone-(2) is purified by recrystallization at -70 DEG to +20 DEG C. from an aliphatic alcohol or ketone or mixtures thereof which has a boiling point lower than the boiling point of pyrrolidone-(2). The solvent may be methanol, ethanol, isopropanol, butanol, isobutanol, acetone, methyl ethyl ketone, or diisopropyl ketone and is used in an amount of 1-50%, preferably 5-25%, by weight. The pyrrolidone is dissolved in the solvent at 25-30 DEG C., solid impurities are filtered, and the solution cooled preferably to -30 DEG to +15 DEG C.

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