Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Treating polymer containing material or treating a solid...
Patent
1986-04-09
1987-04-14
Michl, Paul R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Treating polymer containing material or treating a solid...
C08F 610
Patent
active
046580123
ABSTRACT:
A descending flow of chlorinated aliphatic polymer is continuously contacted with a second solvent having a higher boiling point than the chlorination solvent to effect a solvent exchange. The polymer to be purified is delivered into the head of the exchange column while the second solvent, for example, xylene, is directed into the sump of the exchange column.
REFERENCES:
patent: 4147859 (1979-04-01), Davis
patent: 4381392 (1983-04-01), Pontoglio
Michl Paul R.
Sulzer Brothers Limited
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