Supercritical mixed-solvent separation of polymer mixtures

Details Supercritical mixed-solvent separation of polymer mixtures Supercritical mixed-solvent separation of polymer mixtures

1992-06-02

1993-11-23

Schofer, Joseph L.

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

Synthetic resins

Treating polymer containing material or treating a solid...

528486, 528495, 528496, 528497, 528498, C08F 604

Patent

active

052645363

ABSTRACT:
A supercritical separation process is proposed for polymers, utilizing mixed solvents. Such a process can be used to remove light end, or heavy end, or generate bulk fractions of low polydispersity. Three modes of operation are proposed: increasing solvent capacity, decreasing solvent capacity, and single-vessel multistage separation.

REFERENCES:
patent: 4946940 (1990-08-01), Guckes et al.
Polymer Bulletin, vol. 12, No. 6, Dec., 1984, Heidelberg DE, pp. 491-497; I. Yilgor: `Supercritical Fluids` *abstract*.

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