Original document(83 pages) Authorized document(83 pages) 中文版
    A process for the preparation of aromatic carbonates by transesterification of a starting substance selected from the group consisting of dialkyl carbonates, alkyl aryl carbonates and mixtures of both with a reactant selected from the group consisting of aromatic monohydroxyl compounds, alkyl aryl carbonates and mixtures of both in the presence of a metal catalyst, which comprises reacting part of the high-boiling reaction mixture of the transesterification containing the objective aromatic carbonate and the catalyst or part of the residue remaining after the recovery of the objective aromatic carbonate from the reaction mixture, which contains a high-boiling substance (A) having a higher boiling point than that of the objective aromatic carbonate and the catalyst (B), with a reactant (C) reactive with at least either of the substance (A) and the catalyst (B), and discharging the product of reaction of (A) with (C) from the production system of the aromatic carbonate with the product of reaction of (B) with (C) recycled into the reaction system. This process permits stable preparation of high-purity aromatic carbonates for a prolonged period.
Application Number
申请号
98807686 Application Date
申请日
1998.09.16
Title 名称 Process for preparation of aromatic carbonates
Publication Number
公开号
1265641 Publication Date
公开日
2000.09.06
Approval Pub. Date 2003.06.11 Granted Pub. Date 2003.06.11
International Classification 分类号 C07C68/06;C07C69/96;C08G64/30
Applicant(s) Name
申请人
Asahi Kasei Kogyo Kabushiki Kaisha
Address 地址
Inventor(s) Name 发明人 Tojo Masairo;Oonishi Kazuhiro;Komiya Kyosuke
Attorney & Agent 代理人 li yong

  
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