Monomer/Diluent Recovery

摘要

The disclosure includes a polymerization process and an olefin polymerization system. A polymerization product is produced, a vapor phase is recovered from the polymerization product, the vapor phase is fractionated in a first column to yield a fraction stream, and the fraction stream is fractionated in a second column. A first stream of the second column, which comprises a diluent, can be recycled to a first polymerization reactor. A second stream of the second column, which comprises olefin monomer, diluent, and hydrogen, can be recycled to a second polymerization reactor. Comonomer may be recycled from the first column to the first polymerization reactor, the second polymerization reactor, or both.

主权项

1. A polymerization process comprising:
producing a polymerization product; recovering a vapor phase from the polymerization product; fractionating the vapor phase in a first column to yield a fraction stream; fractionating the fraction stream in a second column; emitting a first stream and a second stream from the second column, wherein the first stream comprises a diluent, and wherein the second stream comprises an olefin monomer, the diluent, and hydrogen; recycling at least a portion of the diluent of the first stream to a first polymerization reactor; and recycling at least a portion of the diluent, at least a portion of the olefin monomer, and at least a portion of the hydrogen of the second stream to a second polymerization reactor.