Process for isolating polymers from their solvents using liquids

Details Process for isolating polymers from their solvents using liquids Process for isolating polymers from their solvents using liquids

1991-12-11

1993-07-20

Kight, III, John

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

528480, 528491, 528497, C08G 6391

Patent

active

052294862

ABSTRACT:
A process for isolating polymers from their solvents by addition of fluids containing carbon dioxide at temperatures of 30.degree. to 280.degree. C. and under pressures of 1 to 1,000 bar is disclosed. The process is characterized in that the concentration of the polymers in their solvents is between 5% and 80% by weight and the fluid containing carbon dioxide consists of at least 50% by weight carbon dioxide.

REFERENCES:
patent: 4634761 (1987-01-01), Mendiratta et al.
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patent: 4918160 (1990-04-01), Kondoh et al.
patent: 4990595 (1991-02-01), Traechkner et al.
Macromolecules, 18, Apr. 1, 1985, McHugh, "Separating Polymer Solutions with Supercritical Fluids".
Article by Yamamoto, Koji in; Kagaku Kogaku 53 (12), 1989, pp. 914-916.
Article by Yamamoto Koji et al. in: Kagaku Kogaku Ronbunshu 15 (3), 1989, pp. 673-675.
Article by Beckmann and Porter, Polym. Sci. Part B: Polym. Phys. 25 (7), pp. 1511-1517, 1987.

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