Continuous process for the removal of residual monomer from aque

Details Continuous process for the removal of residual monomer from aque Continuous process for the removal of residual monomer from aque

1976-05-14

1979-02-06

Bernstein, Hiram H.

Concentrating evaporators

Processes

Involving waste liquid

159165, 159 4ST, B01D 114

Patent

active

041383109

ABSTRACT:
Aqueous dispersions of homo- and co-polymers of vinyl chloride are freed of residual monomer in a continuous manner by mixing the dispersion with steam in a first flow pipe maintained at reduced pressure; degasifying the mixture to a first degasification vessel maintained at a lower pressure; again mixing the degassed mixture with steam in a second flow pipe, also maintained at reduced pressure and having fluid flow diverting means therein; and then again degasifying the mixture in a second degasification vessel maintained at a lower pressure than the second flow pipe.

REFERENCES:
patent: 2437649 (1948-03-01), Milner
patent: 2510548 (1950-06-01), Brunjes
patent: 3469617 (1969-09-01), Palmason
patent: 3815655 (1974-06-01), Burke, Jr.
patent: 3926927 (1975-12-01), Stookey
patent: 3956249 (1976-05-01), Goodman et al.
patent: 3975230 (1976-08-01), Yang et al.

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