Process for the removal of vinyl chloride from polyvinyl chlorid

Details Process for the removal of vinyl chloride from polyvinyl chlorid Process for the removal of vinyl chloride from polyvinyl chlorid

1975-08-28

1977-04-12

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296PT, 526 18, 528500, C08L 2706

Patent

active

040174450

ABSTRACT:
Residual vinyl chloride contents of aqueous polyvinyl chloride dispersions is reduced to less than 50 ppm by withdrawing steam and vinyl chloride contained in a boiling aqueous polyvinyl chloride dispersion at a temperature of 80.degree.-100.degree. C. and at a vaporization rate per minute of 0.006-0.2 kg. steam per kg. of polyvinyl chloride for a period of time from 3-60 minutes until a vinyl chloride content of less than 50 p.p.m. is achieved.

REFERENCES:
patent: 2662867 (1953-12-01), Hoertz
patent: 3052663 (1962-09-01), Bodlaender et al.
patent: 3129132 (1964-04-01), Gudheim
patent: 3371059 (1968-02-01), Rich

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