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    PROCESS FOR CONTINUOUSLY PREPARING COPOLYMERS OF MONOETHYLENICALLY UNSATURATED MONO- AND DICARBOXYLIC ACIDS
    2.
    发明专利
    PROCESS FOR CONTINUOUSLY PREPARING COPOLYMERS OF MONOETHYLENICALLY UNSATURATED MONO- AND DICARBOXYLIC ACIDS 未知

    公开(公告)号：DE3374871D1

    公开(公告)日：1988-01-21

    申请号：DE3374871

    申请日：1983-09-06

    Applicant: BASF AG

    Inventor： DENZINGER WALTER ,  HARTMANN HEINRICH DR ,  TRIESELT WOLFGANG DR ,  HETTCHE ALBERT DR ,  SCHNEIDER ROLF DR ,  RAUBENHEIMER HANS-JUERGEN

    IPC: C02F5/10 ,  C08F2/00 ,  C08F2/10 ,  C08F8/00 ,  C08F8/12 ,  C08F8/44 ,  C08F20/00 ,  C08F20/02 ,  C08F120/04 ,  C08F220/04 ,  C08F222/02 ,  C11D3/37

    Abstract: Copolymers which contain, as copolymerized monomer units, monoethylenically unsaturated mono- and dicarboxylic acids are prepared by a process in which (a) from 10 to 60% by weight of a monoethylenically unsaturated dicarboxylic acid of 4 to 6 carbon atoms, its salt and/or, if appropriate, its anhydride, (b) from 90 to 40% by weight of a monothylenically unsaturated monocarboxylic acid of 3 to 10 carbon atoms and/or its salt and (c) from 0 to 20% by weight of another, carboxyl-free monoethylenically unsaturated monomer which is copolymerizable with (a) and (b), the percentages being based on the sum of the monomers, are polymerized in the presence of from 0.5 to 5% by weight of a water-soluble free-radical-forming initiator in an aqueous medium at from 60 DEG to 150 DEG C., and, if appropriate, their anhydride groups are hydrolyzed, the monomers (a) and (b) being employed in a form such that from 20 to 80% of their amount is neutralized during the polymerization reaction, wherein the copolymerization is carried out continuously in a reactor cascade comprising several reactors, and an aqueous solution of a pre-prepared copolymer of (a), (b) and, if appropriate, (c) is initially introduced into all the reactors and heated to the required reaction temperature, the total amount of unneutralized or partially neutralized (a), not less than 40% by weight of unneutralized or partially neutralized (b), where relevant, all or some of (c), and some or all of the amount of initiator required for polymerization, with or without the amount of neutralizing agent required for the neutralization according to the definition, are metered into the first reactor, the remaining amount of unneutralized or neutralized (b) and, where relevant, (c), and any remaining amount of initiator and neutralizing agent which may be required are introduced into the second reactor or are distributed over the second reactor and the downstream reactors, and the reactants are allowed to react together during a residence time of from 0.5 to 8 hours. The above copolymers can be used as incrustation inhibitors or for scaling inhibition.

    POLYMERS OF ORGANIC ACIDS, PROCESS FOR THEIR PREPARATION AND THEIR USE IN WASHING AND CLEANING COMPOSITIONS
    4.
    发明专利
    POLYMERS OF ORGANIC ACIDS, PROCESS FOR THEIR PREPARATION AND THEIR USE IN WASHING AND CLEANING COMPOSITIONS 未知

    公开(公告)号：DE3265093D1

    公开(公告)日：1985-09-05

    申请号：DE3265093

    申请日：1982-10-04

    Applicant: BASF AG

    Inventor： HAMBRECHT JUERGEN DR ,  HARTMANN HEINRICH DR ,  DENZINGER WALTER ,  HETTCHE ALBERT DR ,  TRIESELT WOLFGANG DR ,  SCHNEIDER ROLF DR

    IPC: C08F2/02 ,  C08F220/04 ,  C11D3/37

    Abstract: 1. A process for the preparation of polymeric organic acids by copolymerizing monoolefinically unsaturated monofunctional acids and monoolefinically unsaturated monomers, copolymerizable therewith and devoid of acid groups, with or without monoolefinically unsaturated dicarboxylic acids and/or anhydrides which are copolymerizable with the preceding monomers, in the presence of a free radical initiator at elevated temperatures and superatmospheric pressures, wherein the copolymerization is carried out as a continuous mass polymerization using, based on the sum of the monomers, a) from 50 to 95% by weight of one or more of the unsaturated monofunctional acids of 3 to 10 carbon atoms, b) from 0.5 to 5% by weight of one or more of the monomers copolymerizable with a) and devoid of acid groups, and c) from 0 to 49% by weight of one or more of the unsaturated dicarboxylic acids or their anhydrides of 4 to 6 carbon atoms, with the proviso that the percentages of a, b and c add up to 100, in the presence of 0.1 to 5% by weight, based on the sum of a, b and c, of the free radical initiator, at from 200 to 400 degrees C, and the copolymers obtained may, if desired, be completely or partially neutralized.

    10.
    发明专利
    未知

    公开(公告)号：DE4041571A1

    公开(公告)日：1992-06-25

    申请号：DE4041571

    申请日：1990-12-22

    Applicant: BASF AG

    Inventor： VOSS HARTWIG DR ,  SCHNEIDER ROLF DR

    IPC: B01D61/44 ,  C07C303/02 ,  C07C303/44 ,  C07C309/04

    Abstract: Process for liberating organic sulphonic acids from aqueous solutions of their salts, in which the aqueous organosulphate solution is electrodialysed with the aid of an electrodialysis cell which is assembled from diluate chambers KD, acid chambers KS and base chambers KB according to the sequence I (MB/KS/MA/KD/MK/KB)n I in which MB represents a bipolar ion exchanger membrane, MA represents an anion exchanger membrane, MK represents a cation exchanger membrane and n represents a number from 1 to 500.

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