Recovery of lactam solvent from vinyl polymer solution

Details Recovery of lactam solvent from vinyl polymer solution Recovery of lactam solvent from vinyl polymer solution

1975-04-25

1977-03-29

Sofer, Jack

Distillation: processes, separatory

Adding material to distilland except water or steam per se

Organic compound

134 12, 203 57, 2602393A, 2603265FM, B01D 334, B08B 704, C07D21000, C07D20712

Patent

active

040147541

ABSTRACT:
N-lower alkyl lactam solvent is recovered from a solution of polymer such as PVC residue in such solvent by adding to the solution a plasticizer for the polymer and then recovering the lactam from the solution by distillation. The plasticizer has a boiling point of at least about 25.degree. C above the boiling point of the lactam solvent. A stabilizer for the polymer may also be used.

REFERENCES:
patent: 3179609 (1965-04-01), Morison
patent: 3475218 (1969-10-01), Torrenzano et al.
patent: 3624009 (1971-11-01), Sussman et al.
patent: 3666691 (1972-05-01), Spillerr
patent: 3673099 (1972-06-01), Corby et al.
patent: 3813309 (1974-05-01), Bakos et al.

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