Apparatus for the manufacture of vinyl chloride polymers

Details Apparatus for the manufacture of vinyl chloride polymers Apparatus for the manufacture of vinyl chloride polymers

1976-03-08

1978-03-07

Camby, John J.

Drying and gas or vapor contact with solids

Apparatus

With apparatus using centrifugal force

34 57D, 34 60, F26B 1700

Patent

active

040771350

ABSTRACT:
The present invention provides vinyl chloride polymers having a reduced content of residual monomer. They are obtained by treating with steam a product moist with water at a temperature of from 90.degree. to 125.degree. C under a pressure of from 400 to 1,600 mm Hg. The invention also provides an apparatus to carry out the steam treatment of the moist polymer. The treated polymers have a residual vinyl chloride content down to less than 0.001% by weight.

REFERENCES:
patent: 547597 (1895-10-01), Brantingham
patent: 1590798 (1926-06-01), Barker
patent: 2817155 (1957-12-01), Gilliam et al.
patent: 3190867 (1965-06-01), Oldweiler et al.
patent: 3793742 (1974-02-01), Rainville et al.

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