| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for producing carbonyl chloride considerably reducing superfluous carbon monoxide in production, eliminating the remaining of impurities for the most part and excelling in hue, and to provide polycarbonate resin having little metal corrosive material and excelling in hue and molding thermal stability. <P>SOLUTION: The method for continuously producing carbonyl chloride includes supplying chlorine (A mols) and carbon monoxide (B mols) continuously into a reaction system having a catalyst, and circulating a part (C mols) of the produced carbonyl chloride to supply it into the reaction system. The temperature of circulating gas is within a range of 40-150°C, and the following expressions (1), (2) are satisfied: (1) A:B=1.000:1.005-1.100 (molar ratio) and (2) A:C=1.00:0.05-3.00 (molar ratio). <P>COPYRIGHT: (C)2012,JPO&INPIT |
