Without mercury catalyst synthesis vinyl chloride thereof technique

Without mercury catalyst synthesis vinyl chloride thereof technique

  • CN 104,744,207 B
  • Filed: 02/12/2015
  • Issued: 05/22/2018
  • Est. Priority Date: 02/12/2015
  • Status: Active Grant
First Claim
Patent Images

1. without mercury catalyst synthesis vinyl chloride thereof technique, it is characterised in that:

  • Comprise the following steps successively:

    Catalyst is added in, vacuumized, is formerMaterial mixing, reaction, washing neutralization, fore-running and rectifying;

    The catalyst adds in step:

    In converter(

    3)

    In, loading catalyst;

    The vacuum step:

    To converter(

    3)

    Vacuum degree 0.065mpa is evacuated down to, with 20H-1Air speed, be passed through 120-140DEG C dry hot nitrogen 5h;

    The raw material blend step:

    Water content is less than 200mg/m3Monochloro methane, dichloromethane and acetylene pass through ratio tune respectivelyDevice is solved, the molar ratio for controlling three is 1;

    1;

    2 are uniformly mixed into static mixer;

    The reaction step:

    The preheated device of mixed gas is preheated to 120 DEG C, from converter(

    3)

    Entrance suitable for reading, the vinyl chloride of generationFrom converter(

    3)

    Lower mouth discharge;

    The air speed 40-80h of dichloromethane-1

    Converter(

    3)

    Reaction temperature is kept at 150-250 DEG C, insteadIt is 0.1 to 1.0mpa to answer pressure;

    The washing neutralization procedure, from converter(

    3)

    The gas of outflow is in water scrubber(

    4)

    Add in substantial amounts of cold water carry out cooling washIt washs, neutralizes unreacted hydrogen chloride, and vinyl chloride and heavy constituent is made to liquefy;

    The fore-running step, noncondensable gas are sent into primary distillation tower(

    5)

    , it is vented back in a small amount of acetylene of tower top, monochloro methane gasIt receives, tower reactor is vinyl chloride and dichloromethane and other a small amount of heavy constituents;

    The rectification step, by primary distillation tower(

    5)

    Tower bottoms is sent to rectifying column(

    6)

    , isolate vinyl chloride product and heavies liquid.

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