Butadiene extracting method

Butadiene extracting method

  • CN 104,812,726 B
  • Filed: 09/19/2013
  • Issued: 04/30/2019
  • Est. Priority Date: 10/04/2012
  • Status: Active Grant
First Claim
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1. a kind of from C4The method of fraction recycling 1,3-butadiene, which comprisesButane, butylene, 1,2- butadiene, 1,3- butadiene, C will be contained4Alkynes, C3Alkynes and C5+The hydrocarbon-fraction of hydrocarbon is fed into fourthDiene extraction unit;

  • 1,3- butadiene fraction, C are recycled from the butadiene extraction unit3Alkynes fraction, C4Alkynes fraction includes the butaneWith one or more fractions of butylene and include 1,2- butadiene and the C5+The fraction of hydrocarbon, wherein the C4Alkynes fraction packetContaining C4Alkynes and 1,2- butadiene;

    C described in selective hydration3Alkynes fraction and the C4At least one of alkynes fraction with generate comprising alkene, alkadienes andThe hydrogenation effluent of oligomer by-product;

    By the hydrogenation effluent and it is described include 1,2- butadiene and the C5+The fraction of hydrocarbon is fed into knockout tower to recycleInclude the C5+The heavy end of hydrocarbon and oligomer by-product and lightweight comprising the alkene, alkadienes and 1,2- butadieneFraction;

    WithThe light fraction is fed into the butadiene extraction unit.

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