Patent ID: 6277954
Filing Date: 2001-08-21
Classification: B01J,C08F

Abstract:
A method for continuously stripping an unreacted monomer from a latex of a vinyl chloride paste resin, comprising the steps of continuously supplying a vinyl chloride paste resin latex from a latex feed line to a vacuum recovery vessel maintained under reduced pressure, the temperature of said latex to be supplied being higher than that of said latex which has been introduced to and present in said recovery vessel, boiling said latex in said recovery vessel under said reduced pressure, withdrawing a monomer gas generated in said recovery vessel through an exhaust line which is connected to the upper part of said recovery vessel and is provided with a foam separator, bringing a foam, which has generated in and overflowed from said recovery vessel toward said foam separator through said exhaust line, into contact with steam introduced to said foam separator and/or a pipe of said exhaust line, thereby destroying said foam, returning the resulting vinyl chloride paste resin latex in said foam separator to said recovery vessel, and continuously withdrawing the vinyl chloride paste resin latex from said recovery vessel.