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    Production of alkali metal salts of polyamine polyacetic acids
    14.
    发明专利
    Production of alkali metal salts of polyamine polyacetic acids 未知

    公开(公告)号：GB1137686A

    公开(公告)日：1968-12-27

    申请号：GB1882466

    申请日：1966-04-29

    Applicant: BASF AG

    Inventor： BOETTGER GUENTER ,  GUENTHERT PAUL ,  KINDLER HUBERT ,  STANGER HANS

    IPC: C07C20060101

    Abstract: 1,137,686. Alkali metal salts of polyamine polyacetic acids. BADISCHE ANILIN- & SODA-FABRIK A.G. 29 April, 1966 [30 April, 1965], No. 18824/66. Heading C2C. Alkali metal salts of polyamine polyacetic acids are continuously produced from a non- aromatic polyamine, formaldehyde and an alkali metal cyanide (or hydrocyanic acid and alkali metal hydroxide) in aqueous solution at elevated temperature by effecting the reaction in a multistage cascade of reactors with a continuous supply of the reactants wherein the polyamine and alkali metal cyanide are used in a stoichiometric excess over formaldehyde (main reaction) in at least one stage, adding the remainder of the reactants in a subsequent stage, and in at least one further stage an after-reaction takes place in which the alkali metal cyanide content of the reaction product is decreased to a concentration less than 0À1% by wt., and at the same time ammonia is removed continuously from all the stages. The reaction is suitably effected at 60-120‹ C. at a pressure, for example of 0À5 to 3 atmospheres and ammonia formed may be removed by generating steam during the reaction or by passing an inert gas through the reaction mixture. The reaction mixture preferably flows in succession through from 3 to 8 separate reaction zones and the formaldehyde is suitably employed as a 20 to 40 wt. per cent aqueous solution. The concentration of the alkali metal cyanide in the final stage may be determined by metering in to the solution a small amount of formaldehyde. In the examples, the tetra-sodium salt of ethylenediamine tetraacetic acid is prepared, some nitrilotriacetic acid also being obtained.

    Copolymers of ethylenimine and 1,2 propylenimine and a process for their production
    16.
    发明专利
    Copolymers of ethylenimine and 1,2 propylenimine and a process for their production 未知

    公开(公告)号：GB985716A

    公开(公告)日：1965-03-10

    申请号：GB1966063

    申请日：1963-05-17

    Applicant: BASF AG

    Inventor： STANGER HANS ,  SANNE WALTER

    IPC: C08G73/02 ,  C08G73/04 ,  D21H17/56

    Abstract: The invention comprises copolymers of 20 to 80% by weight of ethylene imine and 80 to 20% of 1,2-propylene imine. The preferred copolymers have, as 50% aqueous solutions, viscosities of at least 100 poises, corresponding to molecular weights of at least 10,000. They may be prepared by cationic polymerization, preferably by acid or acid-forming substances, e.g. carbon dioxide or 1,2-ethylene dichloride, in aqueous solutions. The preferred copolymers contain 35 to 65% of each imine. In a comparison with other polymers, a mixture of equal parts of homopolymers of ethylene imine and propylene imine is specified as a 50% aqueous solution. Uses.-In the paper industry for increasing freeness and wet tensile strength and as a flocculation and clarifying agent.ALSO:Copolymers of 20 to 80% by weight of ethylene imine and 80 to 20% of 1, 2-propylene imine are used in the manufacture of paper for increasing freeness and wet tensile strenth and as a flocculating and clarifying agent. They are used as 50% by weight aqueous solutions. Comparisons are given with homopolymers of ethylene imine and propylene imine and mixtures thereof.

    Improvements in the production of chloralkylammonium chlorides
    20.
    发明专利
    Improvements in the production of chloralkylammonium chlorides 未知

    公开(公告)号：GB872284A

    公开(公告)日：1961-07-05

    申请号：GB3042359

    申请日：1959-09-07

    Applicant: BASF AG

    Inventor： SOENKSEN HANS ,  STANGER HANS ,  PALM ALBERT ,  SCHMIDT JOSEPH

    Abstract: Chloralkylammonium chlorides are prepared by treating a mixture of an alkanolamine (40-86% by weight) and water at elevated temperature e.g. between 150 and 180 DEG C., and pressure in the presence of not more than 40%, based on the reaction mixture, of hydrogen chloride. Ethanolamine, di- and triethanolamines, isopropanolamine, 2-dimethylaminoethanol, 2-methylaminocyclohexanol, 2-phenylethanolamine, 3 - aminopropanol, 4 - aminobutanol and 4-aminocyclohexanol are specified and the reaction may be batchwise or continuous. A dehydration catalyst such as sulphuric or phosphoric acid, zinc chloride or aluminium phosphate may be included. Chloralkylamines may be obtained by the addition of a base. Specification 468,387 is referred to.

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