Method for the continuous recovery of soluble polypropylene...

Details Method for the continuous recovery of soluble polypropylene... Method for the continuous recovery of soluble polypropylene...

C - Chemistry, Metallurgy

08

F

402/604

C08F 10/06 (2006.01) C08F 6/12 (2006.01) C08J 11/08 (2006.01)

Patent

CA 1055648

METHOD FOR THE CONTINUOUS RECOVERY OF SOLUBLE POLYPROPYLENE FROM SPENT POLYMERIZATION MEDIA ABSTRACT OF DISCLOSURE Polypropylene is recovered from a dilute solution in spent organic polymerization medium in a process comprising: (1) partial steam strip- ping of volatile components from said medium to form an aqueous phase and a concentrated, water-insoluble phase containing the soluble poly- propylene; (2) separating said concentrated water-insoluble phase and leading it into an evaporator; (3) evaporating the remaining volatile components from the separated said water-insoluble phase leaving fluid- ized polypropylene which when drawn off and solidified is suitable for commercial use.

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