PROCESS AND DEVICE FOR MANUFACTURING AN AROMATIC A

专利名称：PROCESS AND DEVICE FOR

MANUFACTURING AN AROMATICALKYLENE POLYMER

发明人：GALEWSKI, Jean-Marc申请号：EP02740947.3申请日：20020710公开号：EP1414869A1公开日：20040506

摘要：Continuous production of alkenyl-aromatic polymers involves 2-stage

devolatilisation of the bulk polymer melt, processing the vapor from the devolatilisers intwo direct condensation/fractionation zones and recycling parts of the resulting gas andliquid streams to remove unreacted monomer and oligomers. A method for the

continuous production of alkenyl-aromatic polymers (I) by bulk polymerisation followedby 2-stage devolatilisation to remove unreacted monomer and oligomers. The methodinvolves (a) feeding a first gas stream separated from the polymer in stage 1 of thedevolatilisation into a first zone Z1 for direct condensation and fractionation, taking offgas (G1) consisting essentially of monomer at the top of Z1, taking off oligomer-richliquid (L1) at the bottom of Z1, cooling part of L1 and returning it to Z1 so as to obtainpartial condensation of the first gas stream in Z1 by direct contact, and (b) feeding asecond gas stream separated in stage 2 of the devolatilisation into a second

condensation/fractionation zone Z2 which is also supplied with the other part of L1 fromZ1, so as to obtain partial condensation of the second stream in Z2, taking off gas G2(essentially monomer) from the top of Z2 and taking off liquid L3 (essentially oligomers)

from the bottom of Z2. An Independent claim is also included for apparatus for theabove method comprising a polymerisation zone (1), two devolatilisers (DV1, DV2), lines(4, 10) connecting DV1 and DV2 to direct condensation/fractionation zones (Z1) and (Z2)respectively, lines (5, 11) for taking off gaseous monomer from the top of Z1 and Z2,lines (6, 14) for taking off liquid oligomers from the bottom of Z1 and Z2, and a recyclingline (8) with a cooler (9) for returning part of the liquid from line (6) to Z1.

申请人：BP Chemicals Limited

地址：Britannic House,1 Finsbury Circus London EC2M 7BA GB

国籍：GB

代理机构：Preece, Michael

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