Process for the removal of vinyl chloride from polyvinyl chloride dispersions
摘要
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 DEG -100 DEG 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.
申请公布号
US4017445(A)
申请公布日期
1977.04.12
申请号
US19750608791
申请日期
1975.08.28
申请人
CHEMISCHE WERKE HULS AKTIENGESELLSCHAFT
发明人
GROSSE-WORTMANN, HANS;HENTSCHEL, BERNHARD;RAUTH, PETER;SCHOENBERG, KARL-HEINZ;TERWIESCH, BERND;WINTER, HERMANN