Invention Grant
- Patent Title: Process for the preparation of polycarbonate
- Patent Title (中): 制备聚碳酸酯的方法
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Application No.: US12829845Application Date: 2010-07-02
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Publication No.: US08173762B2Publication Date: 2012-05-08
- Inventor: Pieter Ooms , Andreas Bulan , Johann Rechner , Rainer Weber , Marc Buts , Johan Vanden Eynde
- Applicant: Pieter Ooms , Andreas Bulan , Johann Rechner , Rainer Weber , Marc Buts , Johan Vanden Eynde
- Applicant Address: DE Leverkusen
- Assignee: Bayer MaterialScience AG
- Current Assignee: Bayer MaterialScience AG
- Current Assignee Address: DE Leverkusen
- Agency: Conolly Bove Lodge & Hutz LLP
- Priority: DE102009032020 20090707
- Main IPC: C08G64/00
- IPC: C08G64/00 ; C08G63/02

Abstract:
A combined process for the preparation of polycarbonate from bisphenols and diaryl carbonates, the monophenol liberated being reacted again for the preparation of the diaryl carbonate and the alkali metal halide forming in the preparation of the diaryl carbonate being converted by electrochemical oxidation, optionally over a gas diffusion electrode, into chlorine and alkali hydroxide solution, the chlorine being recycled into the preparation of the phosgene and the alkali hydroxide solution being recycled into the preparation of the diaryl carbonate.
Public/Granted literature
- US20110009592A1 PROCESS FOR THE PREPARATION OF POLYCARBONATE Public/Granted day:2011-01-13
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