| 摘要 |
<p>A process for preparing a polycarbonate by conducting transesterification in a reactor with the liquid-contacting portion thereof subjected to (1) heat treatment, (2) washing with a carbonyl compound, or (3) treatment with a particular hydroxyl compound; an apparatus for preparing a polycarbonate by transesterification, of which the liquid-contacting portion is made of stainless steel and the surface of the contacting portion is in a specific state; and a surface treatment method for providing the apparatus. Even in the case of a reactor made of inexpensive stainless steel, the surface treatment of the reactor in its liquid-contacting portion enables a high-molecular weight polycarbonate having a good color tone to be easily prepared by transesterification.</p> |
