Residual Monomer Reduction in Polymer Latex Products by Extraction with Supercritical Carbon Dioxide

被引：9

作者：

Aerts, Marijke ^{[1
]}

Meuldijk, Jan ^{[1
]}

Kemmere, Maartje ^{[2
]}

Keurentjes, Jos ^{[1
]}

机构：

[1] Eindhoven Univ Technol, Dept Chem Engn & Chem, POB 513, NL-5600 MB Eindhoven, Netherlands

[2] Friesland Foods Corp Res, Campina, Netherlands

来源：

POLYMER REACTION ENGINEERING - 10TH INTERNATIONAL WORKSHOP | 2011年 / 302卷

关键词：

extraction; latex; partitioning; residual monomer; shuttle effect; supercritical carbon dioxide; MASS-TRANSFER; GAS-ABSORPTION; SLURRY REACTORS; ENHANCEMENT; PARTICLES; BUBBLES; 3-PHASE; SYSTEMS;

D O I：

10.1002/masy.201000052

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Extraction of residual monomer from a latex product with supercritical carbon dioxide ((sc)CO2) in a column was studied. Operating conditions were chosen at 35 degrees C and 100 bar. For reducing the residual styrene level in a polystyrene latex from 10(4) ppm to 100 ppm and from 10(4) ppm to 10 ppm, a countercurrent bubble column with latex as continuous and (sc)CO2 as dispersed phase is suggested. Monomer partitioning was demonstrated to be a key parameter in the equipment design. Monomer transport was found to be governed by the shuttle effect, caused by Brownian motion of the latex to and from the H2O/CO2 interface. The drift-flux approach was followed to determine the column flooding conditions. Small column volumes are obtained. (sc)CO2 is a promising extraction medium for residual monomer reduction in latex products. Performance towards steam stripping is better as the final residual monomer level becomes lower.

引用

页码：297 / 304

页数：8

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