Process and apparatus for industrial fractionation of polymers

Details Process and apparatus for industrial fractionation of polymers Process and apparatus for industrial fractionation of polymers

1992-02-14

1993-09-07

Spear, Frank

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

210511, B01D 1104

Patent

active

052425940

ABSTRACT:
In a process for industrial fractionation of polymers using an extraction column and a homogeneous extraction agent a homogeneous feed is supplied to a region of the extraction column which is nearer the upper end thereof when the feed has a greater density than the extraction agent and which is nearer the lower end thereof when the feed has a lower density than the extraction agent. An apparatus for carrying out this process consists advantageously, instead of a pulsed sieve plate column as hitherto, of an unpulsed filling body column which leads to a better separation because a back mixing is avoided in favourable manner.

REFERENCES:
patent: 4031039 (1977-06-01), Mizumoto et al.
Manfred J. R. Cantow, "Polymer Fractionation", Academic Press N.Y. 1967.
Martin Hoffman et al, "Polymer Analysis" Thieme Verlag, Stuttgart, 1977.
Geerissen et al, "Continuous Fractionation and Solution Properties of PVC, 1 Continuous Fractionation, Characterisation", Makromol. Chem., 186 (1985) Apr., No. 4, pp. 735-715.
Geerissen et al, "Continuous Fractionation and Solution Properties of PVC, 4 Pressure Dependence of the Solubility In a Mixed Solvent", Makromol. Chem., 186 (1985) Apr., No. 4, pp. 777-785.
Search Report Dated Dec. 7, 1992.

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