Process for the preparation of polycarbonates
    11.
    发明授权
    Process for the preparation of polycarbonates 失效
    聚碳酸酯的制备方法

    公开(公告)号:US5336750A

    公开(公告)日:1994-08-09

    申请号:US20502

    申请日:1993-02-22

    CPC分类号: C08G64/307

    摘要: A process for the preparation of a polycarbonate comprising reacting a diaryl carbonate with a bisphenol to produce a polycarbonate and a phenol, regenerating the diaryl carbonate by reacting the phenol byproduct with a carbonyl halide, and optionally recycling the hydrogen halide using a metal Redox captive halogen swing reactor system.

    摘要翻译: 一种制备聚碳酸酯的方法,包括使碳酸二芳基酯与双酚反应以制备聚碳酸酯和苯酚,通过使苯酚副产物与羰基卤反应再生碳酸二芳基酯,并且任选地使用金属氧化还原电荷卤素 摆动反应堆系统。

    Process for the preparation of phenyl carbonates or polycarbonates
    13.
    发明授权
    Process for the preparation of phenyl carbonates or polycarbonates 失效
    制备苯基碳酸酯或聚碳酸酯的方法

    公开(公告)号:US5276134A

    公开(公告)日:1994-01-04

    申请号:US577423

    申请日:1990-09-04

    IPC分类号: C08G64/30 C08G64/38

    CPC分类号: C08G64/30

    摘要: A process for the preparation of an aromatic carbonate or polycarbonate from a phenol or bisphenol, methanol, carbon monoxide and oxygen comprising the steps of 1) reacting phenol or bisphenol with acetic anhydride to form (bis)phenyl acetate; 2) reacting dimethyl carbonate with (bis)phenyl acetate from step 1 to produce a phenyl carbonate or polycarbonate and methyl acetate; and 3) reacting the methyl acetate with carbon monoxide to produce acetic anhydride for use in step 1. In a desirable embodiment the dimethyl carbonate may also be prepared by reaction of methanol, carbon monoxide and oxygen.

    摘要翻译: 一种由酚或双酚,甲醇,一氧化碳和氧气制备芳族碳酸酯或聚碳酸酯的方法,包括以下步骤:1)使酚或双酚与乙酸酐反应形成(双)苯基乙酸酯; 2)使碳酸二甲酯与来自步骤1的乙酸双(苯)酯反应生成苯基碳酸酯或聚碳酸酯和乙酸甲酯; 和3)使乙酸甲酯与一氧化碳反应以制备用于步骤1的乙酸酐。在所需的实施方案中,碳酸二甲酯也可以通过甲醇,一氧化碳和氧气的反应来制备。

    Preparation of aromatic carbonates
    15.
    发明授权
    Preparation of aromatic carbonates 失效
    芳香族碳酸酯的制备

    公开(公告)号:US4973728A

    公开(公告)日:1990-11-27

    申请号:US084358

    申请日:1987-08-12

    IPC分类号: C07C68/06

    CPC分类号: C07C68/06 C07C68/005

    摘要: Aromatic carbonates useful for the preparation of high molecular weight polycarbonate resins are prepared by reacting methanol, carbon monoxide and oxygen to prepare dimethyl carbonate; reacting a methyl silyl ether with a phenol or bisphenol to prepare an aryl silyl ether, and reacting the dimethyl carbonate and aryl silyl ether to prepare an aromatic carbonate.

    摘要翻译: 用于制备高分子量聚碳酸酯树脂的芳族碳酸酯通过使甲醇,一氧化碳和氧气反应制备碳酸二甲酯; 使甲基甲硅烷基醚与苯酚或双酚反应制备芳基甲硅烷基醚,并使碳酸二甲酯和芳基甲硅烷基醚反应制备芳族碳酸酯。