Process for producing an aromatic polycarbonate
AssigneeMitsubishi Chemical Corporation
InventorsMasaaki Miyamoto, Kiyoji Kuma, Narutoshi Hyoudou, Eiji Fujimoto
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Abstract
To produce an aromatic polycarbonate excellent in physical properties and hue by a simplified step as compared with a conventional one. A process for producing an aromatic polycarbonate, which comprises the following steps (1) to (3): (1) a step of reacting phenol with acetone in the presence of an acid catalyst to convert part of the phenol into bisphenol A, to obtain a bisphenol A/phenol composition, (2) a step of supplying the bisphenol A/phenol composition held in a molten state in a liquid form to an aromatic polycarbonate production step, and (3) a step of reacting the bisphenol A and a carbonate material to produce an aromatic polycarbonate.
Claims11
A process for producing an aromatic polycarbonate, which comprises the following steps (1) to (3):
- (1) a step of reacting phenol with acetone in the presence of an acid catalyst to convert part of the phenol into bisphenol A, to obtain a bisphenol A/phenol composition,
- (2) a step of supplying the bisphenol A/phenol composition held in a molten state in a liquid form to an aromatic polycarbonate production step, and
- (3) a step of subjecting the bisphenol A and a carbonate material to polymerization to produce an aromatic polycarbonate.
Dependencies are inferred from the claim text.