发明名称 |
PROCESS FOR PREPARING AROMATIC HYDROXYCARBOXYLIC ACIDS |
摘要 |
<p>Aromatic hydroxycarboxylic acids are prepared by reacting an alkali metal salt of an aromatic hydroxy compound in solid phase with carbon dioxide, by reacting an alkali metal salt of an aromatic hydroxy compound in the form of granules in a fluidized bed with carbon dioxide, if desired under elevated pressure, at first at temperatures of 20 to 130.degree.c until at least 40 % of the hydroxy compound has been converted into the correspond carbonate, then completing the reaction at temperatures of 135 to 300.degree.C, and then converting the reaction product obtained into the free acid.</p> |
申请公布号 |
CA1194491(A) |
申请公布日期 |
1985.10.01 |
申请号 |
CA19830424093 |
申请日期 |
1983.03.21 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
STOPP, GERHARD;KARKOSSA, HORST;TRESCHER, VIKTOR |
分类号 |
C07C51/15;(IPC1-7):C07C65/01;C07D209/88 |
主分类号 |
C07C51/15 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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