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    PRODUCTION OF CHLOROPROPENES
    52.
    发明专利
    PRODUCTION OF CHLOROPROPENES 失效

    公开(公告)号：JPS6422828A

    公开(公告)日：1989-01-25

    申请号：JP17715787

    申请日：1987-07-17

    Applicant: AGENCY IND SCIENCE TECHN ,  MITSUI TOATSU CHEMICALS

    Inventor： OOUCHI AKIHIKO ,  MORIYAMA HIROSHI ,  YABE AKIRA ,  KAWAKAMI HARUHIKO ,  MASUDA TAKAYOSHI

    IPC: C07C21/04 ,  C07C17/00 ,  C07C17/25 ,  C07C21/067 ,  C07C67/00

    Abstract: PURPOSE:To selectively obtain the aimed compound at a lower temperature compared with a conventional method without causing any problem such as coking, by subjecting 1,2-dichloropropane to dehydrochlorination reaction under light irradiation in production of chloropropenes by the above-mentioned reaction. CONSTITUTION:1,2-Dichloropropane is subjected to dehydrochlorination reaction under light irradiation, preferably under laser beam irradiation at >=300 deg.C, preferably 360-600 deg.C to selectively provide the aimed chloropropenes at lower temperature area compared with a conventional and thermal chain reaction. When light irradiation is carried out at >=400 deg.C, 3-chloropropene is selectively obtained. Moreover, also in relatively higher temperature area, coking, further clogging to a reactor can be avoided and great saving of energy is practiced.

    VAPORIZATION OF CHLORINATED HYDROCARBON
    55.
    发明专利
    VAPORIZATION OF CHLORINATED HYDROCARBON 失效

    公开(公告)号：JPS62187418A

    公开(公告)日：1987-08-15

    申请号：JP2832886

    申请日：1986-02-12

    Applicant: MITSUBISHI CHEM IND

    Inventor： MURATA YOSHIFUMI ,  FURUMIZO KAZUNAGA ,  IWADE HITOSHI

    IPC: B01D3/00 ,  C07C17/00 ,  C07C17/38 ,  C07C19/01 ,  C07C19/041 ,  C07C21/04 ,  C07C67/00

    Abstract: PURPOSE:To suppress the production of tarry material in the evaporation purification of a solution containing chlorinated hydrocarbon, by using an evaporator containing a liquid and carrying out the evaporation in the presence of a metal chloride in the liquid phase of the evaporator. CONSTITUTION:A solution (A) containing chlorinated hydrocarbon is purified by evaporating with a liquid-containing evaporating at 80-300 deg.C (preferably 100-300 deg.C) in the presence of a metal chloride (e.g. copper chloride, cobalt chloride, lead chloride, etc.) at a concentration of >=5ppm (by weight) (preferably 10-1,000ppm). The raw material solution A is preferably a mixture of chlorinated hydrocarbons containing 1,2-dichloroethane. The evaporator is e.g. thermosyphon-type evaporator, jacket-type evaporator, internal coil-type evaporator, etc. EFFECT:There occurs no lowering of heat-transmission efficiency caused by the deposition of tarry material on the heat-transfer surface of the evaporator because of reduced formation of tarry material.

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