Continuous process for the removal of monomeric impurities from

Details Continuous process for the removal of monomeric impurities from Continuous process for the removal of monomeric impurities from

1975-08-21

1977-04-26

Welsh, M. J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 296PT, 260 296B, C08L 5708

Patent

active

040200329

ABSTRACT:
A process for removing residual monomer from an emulsifier-containing aqueous dispersion of a solid vinyl chloride polymer having a surface tension of less than 60 dyne/cm., which comprises continuously admixing the polymer dispersion with steam in a fluid flow pipe under a pressure of 150-600 torr at a flow velocity of 1-20 m./sec., and passing said admixture at an exit velocity of 30-100 m./sec. horizontally into and along the walls of a degasification tank having a pressure 30-200 torr lower than the pressure in said flow pipe to evaporate residual monomer.

REFERENCES:
patent: 3371059 (1968-02-01), Rich

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