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Olefin polymerization process

  • US 10,640,582 B2
  • Filed: 11/29/2016
  • Issued: 05/05/2020
  • Est. Priority Date: 12/15/2015
  • Status: Active Grant
First Claim
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1. An olefin polymerization process comprising polymerization of at least one olefin monomer in one or more polymerization reactors wherein the polymerization process is carried out in an apparatus comprising:

  • a) one or more reactor vessels to which olefin monomer and catalyst components can be added and which contain an agitated bed of forming polymer particles;

    b) a means for removing a stream comprising polymer particles from the reactor;

    c) a means for removing a gas-liquid stream comprising unreacted olefin monomers from the reactor;

    d) a means for withdrawing a liquid recycle stream from the gas-liquid stream;

    e) a means for recycling the gas-liquid stream of c) to the reactor;

    wherein the process further comprises the steps of i) withdrawing a gaseous stream from the stream comprising polymer particles;

    ii) contacting the liquid recycle stream from d) with said gaseous stream from i) thereby forming a mixture;

    iii) withdrawing a liquid stream from the mixture of ii);

    iv) recycling a vapor stream from the mixture of ii) to the polymerization reactor.

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