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    6.
    发明专利
    未知

    公开(公告)号：DE3719873A1

    公开(公告)日：1988-12-29

    申请号：DE3719873

    申请日：1987-06-13

    Applicant: BASF AG

    Inventor： MERGER FRANZ DR ,  LIEBE JOERG DR ,  BERTLEFF WERNER DR

    IPC: C07B35/06 ,  C07B31/00 ,  C07B47/00 ,  C07B61/00 ,  C07C45/00 ,  C07C45/61 ,  C07C45/66 ,  C07C49/647 ,  C07C57/13 ,  C07C67/00 ,  C07C67/317 ,  C07C67/327 ,  C07C67/42 ,  C07C69/533 ,  C07C69/54 ,  C07C69/593 ,  C07C231/00 ,  C07C233/47 ,  C07C253/00 ,  C07C255/07 ,  C07C255/31 ,  C07C255/34 ,  C07D307/33

    Abstract: 1,1-Disubstituted ethylene compounds of the formula I … … in which… Z is COOR , CN or COR ,… R denotes an aliphatic, cycloaliphatic, araliphatic, aromatic or heterocyclic radical which may optionally be further substituted by functional groups which are inert under the reaction conditions,… R denotes an aliphatic, cycloaliphatic or araliphatic radical having 1 to 15 carbon atoms and… R denotes an aliphatic, cycloaliphatic or araliphatic radical having 1 to 15 carbon atoms which may be substituted by groups which are inert under the reaction conditions, it being however also possible for R together with R or R together with R to form an alkylene chain having 2 to 10 carbon atoms, which may be substituted by groups which are inert under the reaction conditions, are prepared from formyl compounds of the formula II … … in which Z, R , R and R have the abovementioned meanings, the reaction being carried out in the presence of formaldehyde or paraformaldehyde and… a) a C1-C12-alkanol or… b) a mixture of a C1-C12-alkanol and water or… c) using water in the presence of a secondary amine and a protic acid at temperatures of 0 to 200 DEG C.

    7.
    发明专利
    未知

    公开(公告)号：AT296285T

    公开(公告)日：2005-06-15

    申请号：AT01101420

    申请日：2001-01-23

    Applicant: BASF AG

    Inventor： OHLBACH FRANK DR ,  MELDER JOHANN-PETER DR ,  ROSS KARL-HEINZ DR ,  RUDLOFF MARTIN ,  LIEBE JOERG DR

    IPC: C07B61/00 ,  C07D207/26 ,  C07D207/267

    Abstract: N-Methyl-2-pyrrolidone (NMP) is prepared by preparing a mixture comprising monomethylamine, dimethylamine and trimethylamine and ammonia in a first process step by reacting ammonia with methanol at elevated temperature in the presence of a catalyst, separating 10 off the ammonia, reacting the mixture comprising the methylamines with gamma-butyrolactone (gamma-BL), in a molar ratio of monomethylamine to gamma-BL of at least 1 in a second process step at elevated temperature and superatmospheric pressure, separating NMP and unreacted methylamines from the reaction product and returning unreacted methylamines to the first process step for reaction with methanol and ammonia.

    9.
    发明专利
    未知

    公开(公告)号：DE3834435A1

    公开(公告)日：1990-06-13

    申请号：DE3834435

    申请日：1988-10-10

    Applicant: BASF AG

    Inventor： MOENCH DIETMAR DR ,  STANGE ANDREAS DR ,  LIEBE JOERG DR ,  HARTMANN HEINRICH DR ,  MERGER FRANZ DR ,  SCHWARTZ MANFRED DR

    IPC: C08C19/00 ,  C08F8/12 ,  C08F8/28 ,  D21H17/37

    Abstract: Bridged, water-soluble copolymers are obtainable by (A) copolymerization of a monomer mixture of (a) from 50 to 99 mol % of acrylamide and/or methacrylamide, (b) from 50 to 1 mol % of a monoethylenically unsaturated monomer containing actual groups and (c) from 0 to 20 mol % of monomers which differ from (a) and (b), in the presence of a polymerization initiator under conditions such that the acetal groups of the monomers (b) undergo virtually no hydrolysis, (B) hydrolysis of the acetal groups of the monomers (b), present as copolymerized units in the copolymers (A), (C) condensation of the copolymers (B) containing aldehyde groups at a pH above 5, at most to a degree such that the resulting condensates are still water-soluble and (D) stopping of the condensation reaction by adding acid until the pH reaches 3 or less, and are used as paper stock additives in papermaking for increasing the wet strength of paper.

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