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    Process for the continuous production of {60 -chloropropionic acid
    1.
    发明授权
    Process for the continuous production of {60 -chloropropionic acid 失效
    连续生产{60-戊二酸的方法

    公开(公告)号：US3671584A

    公开(公告)日：1972-06-20

    申请号：US3671584D

    申请日：1969-05-20

    Applicant: BASF AG

    Inventor： SCHLECHT HELMUT ,  AURNHAMMER ROBERT

    IPC: C07C51/00 ,  C07C53/19 ,  C07C67/00 ,  C07C53/32

    CPC classification number: C07C53/19

    Abstract: An improved process for the continuous production of Alpha chloropropionic acid by reaction of propionic acid with chlorine in the presence of halides or acid halides of the elements phosphorus and sulfur at elevated temperature, the improvement consisting in carrying out the reaction in the presence of Alpha -chloropropionic acid as solvent and distilling the resultant reaction mixture using the gas formed in the reaction as carrier gas. Alpha -chloropropionic acid is used for the production of plant protection agents.

    Abstract translation: 在高温下元素磷和硫的卤化物或酰卤的存在下，通过丙酸与氯的反应连续生产α-氯代丙酸的改进方法，改进包括在α存在下进行反应 - 氯代丙酸作为溶剂，并使用反应中形成的气体作为载气蒸馏得到的反应混合物。 α-氯丙酸用于生产植物保护剂。

    Process for the production of ª-, ª--dichloropropionic acid
    4.
    发明专利
    Process for the production of ª-, ª--dichloropropionic acid 未知

    公开(公告)号：GB914428A

    公开(公告)日：1963-01-02

    申请号：GB3295161

    申请日：1961-09-14

    Applicant: BASF AG

    Inventor： SCHLECHT HELMUT ,  ALBERS HANS ,  AURNHAMMER ROBERT

    IPC: B01J31/02 ,  C07C51/363 ,  C07C53/19

    Abstract: a ,a -Dichloropropionic acid is prepared by chlorinating a -chloropropionic acid at 160 DEG -180 DEG C., or chlorinating propionic acid at about 120 DEG C. to form a -chloropropionic acid and further chlorinating as above, in the presence of a compound RNHSO2X, where R is hydrogen or alkyl and X is hydroxy, alkoxy or a halogen. Specified catalysts are sulphamic acid, its acid chloride and its esters, e.g. H2NSO3CH3 and C2H5NHSO2Cl; these may be formed in situ, e.g. the last from ethylamine and sulphuryl chloride. Other organic additives which boil above a ,a -dichloropropionic acid and are soluble in the chlorination mixture may be present, e.g. aliphatic or aromatic sulphochlorides.

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