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    • 6. 发明授权
    • Process for the manufacture of monochloroacetaldehyde trimer and chloral
    • 一氯乙醛三聚体和氯醛的制备方法
    • US5414139A
    • 1995-05-09
    • US214123
    • 1994-03-15
    • Takashi WakasugiTadashi MiyakawaFukuichi Suzuki
    • Takashi WakasugiTadashi MiyakawaFukuichi Suzuki
    • B01J23/06B01J23/14C07B61/00C07C45/55C07C45/63C07D323/06C07C45/53C07C45/61
    • C07D323/06C07C45/55C07C45/63
    • A process for manufacturing monochloroacetaldehyde trimer and chloral together by effectively utilizing a raw material acetaldehyde or para-aldehyde. The process comprises a step of chlorinating acetaldehyde or para-aldehyde to produce a chlorinated liquid of which the major component is monochloroacetaldehyde, a step comprising adding chloral to said chlorinated liquid and distilling the mixture to obtain a fraction of which the major components are monochloroacetaldehyde and chloral, a step of trimerizing monochloroacetaldehyde by reacting said fraction in the presence of a trimerization catalyst and separating the MCA trimer by filtration, and a step of chlorinating other fractions from said distillation step and the filtrate from said trimerization step to produce chloral. According to this process all raw material aldehydes and components derived from aldehydes which have not been consumed for the production of MCA trimer can be easily converted into chloral which is useful as an industrial chemical. The process is also free from the problem of the waste water treatment.
    • 通过有效利用原料乙醛或对醛制备单氯乙醛三聚物和氯醛的方法。 该方法包括氯化乙醛或对醛以产生其主要成分为一氯乙醛的氯化液体的步骤,该步骤包括向所述氯化液体中加入氯醛并蒸馏该混合物,得到主要成分为一氯乙醛的馏分, 氯醛,通过在三聚催化剂存在下使所述级分反应并通过过滤分离MCA三聚体,以及从所述蒸馏步骤氯化其它级分的步骤和来自所述三聚步骤的滤液以产生氯醛的步骤,使一氯乙醛三聚。 根据该方法,所有原料醛和源自未用于生产MCA三聚体的醛的组分可以容易地转化成可用作工业化学品的氯醛。 该过程也没有废水处理的问题。