Separation of polymer from hydrocarbon solvent in the manufactur

Details Separation of polymer from hydrocarbon solvent in the manufactur Separation of polymer from hydrocarbon solvent in the manufactur

1986-03-07

1987-06-16

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

By addition of entire unsaturated molecules, e.g.,...

585809, C10C 200

Patent

active

046737685

ABSTRACT:
An improved method for the separation of polymer from hydrocarbon solvent in a process for the manufacture of poly-.alpha.-olefins is disclosed. A solution of polymer and solvent at a temperature above 130.degree. C. and a pressure above atmospheric pressure is passed through pressure reduction means into a vessel. Solvent is flashed off and the polymer forms a pool of molten polymer. The temperature of the walls of the vessel above the pressure reduction means is maintained at least 10.degree. C., and especially at least 30.degree. C., above the temperature of the walls of the remainder of the vessel. The improved method is less susceptible to the formation of gel in the polymer.

REFERENCES:
patent: 2017325 (1935-10-01), Authruff
patent: 2157220 (1939-05-01), Schutt
patent: 2171928 (1939-09-01), Gase
patent: 2180361 (1939-11-01), Lassiat
patent: 2281361 (1942-04-01), Leffer
patent: 2351123 (1944-06-01), Hays et al.
patent: 3149178 (1964-09-01), Hamilton et al.
patent: 3546317 (1970-12-01), Gislon et al.

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