Polymer recovery from solution

Details Polymer recovery from solution Polymer recovery from solution

B - Operations, Transporting

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B01D 11/02 (2006.01) B01F 7/04 (2006.01) B29B 7/84 (2006.01) B29C 47/10 (2006.01) B29C 47/76 (2006.01) C08F 6/06 (2006.01) C08F 6/12 (2006.01)

Patent

CA 1297619

POLYMER RECOVERY FROM SOLUTION Abstract of the Disclosure A process for removing substantial quantities of volatile liquid e.g. hydrocarbon from a mixture of polymer and such liquid is provided. This process consists of the initial step of introducing the mixture, and a liquid which is immiscible with the polymer, into a mixing/kneading zone provided with heated heat transfer surfaces having a temperature higher than the boiling point of the lowest boiling liquid component in the mixing/kneading zone. The mixture and the immiscible liquid are subjected to a period of continuous mixing and kneading within the mixing/kneading zone, to bring the mixture into continuously moving contact with the heat transfer surfaces. During this period of continuous mixing/kneading, the heated heat transfer surfaces are repeatedly mechanically cleaned to prevent buildup of solid polymer thereon. Volatilized liquid is vented from the mixing/kneading zone during the period of continuous mixing and kneading, and the polymer and residual liquid is subsequently discharged from the mixing/kneading zone.

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