Thin film monomer removal from polyvinyl chloride latexes

Details Thin film monomer removal from polyvinyl chloride latexes Thin film monomer removal from polyvinyl chloride latexes

1980-05-27

1982-02-16

Levin, Stanford M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

159 6R, 159 13A, C08F 616

Patent

active

043158439

ABSTRACT:
A process for extracting vinyl chloride monomer from polyvinyl chloride latexes is disclosed, characterized in that the latex is continuously flowed on and along a heat exchange surface in the form of a thin film having a thickness ranging from 0.5 to 1.2 mm, said latex having a temperature between 40.degree. and 70.degree. C. and under a pressure ranging from 45 to 210 mm Hg., and for a time ranging from 10 to 70 seconds. The gaseous vinyl chloride monomer is removed concurrently with the flow of the latex. Suitable apparatus is also disclosed.

REFERENCES:
patent: 3371059 (1968-02-01), Rich
patent: 4020032 (1977-04-01), Kalka et al.
patent: 4130527 (1978-12-01), Miller et al.
patent: 4151141 (1979-04-01), Moore et al.
patent: 4158092 (1979-06-01), Botsch et al.

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