| 摘要 |
PURPOSE:To obtain purified polycarbonate granules containing little chlorine atom, by heating, at temperatures higher than a specified level, organic chlorine compound-containing polycarbonate granules in a water-slurry state. CONSTITUTION:The objective purification can be accomplished by heating, at >=150 deg.C, a water-slurry of organic chlorine compound (e.g., tetrachloroethane, 1,2-dichloroethylene)-contg. polycarbonate granules with a concentration of the granules pref. 20-40wt.% followed by discharge of the solvent in the slurry. Said granules are preferably (nearly) spherical with an average size 0.1-10mm.
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