发明名称 |
Process for the preparation of polyhydric phenols |
摘要 |
The invention relates to an improved process for the preparation of polyhydric phenols by hydroxylation of phenols with peroxidic hydroxylating agents and in the presence of 0.00005 to 0.03% by weight (relative to the phenols employed) of substances which can form chelate complexes with metal ions, such as nitrogen-containing di- or poly- carboxylic acids or phosphoric acid derivatives. The products of the process are known to be useful in the fields of photography, dyestuffs, plastics, fragrances and flavors.
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申请公布号 |
US4387252(A) |
申请公布日期 |
1983.06.07 |
申请号 |
US19800193572 |
申请日期 |
1980.10.03 |
申请人 |
BAYER AKTIENGESELLSCHAFT |
发明人 |
JUPE, CHRISTOPH;WALDMANN, HELMUT;SEIFERT, HERMANN |
分类号 |
B01J27/00;B01J31/00;C07B61/00;C07C27/00;C07C37/60;C07C39/08;C07C67/00;(IPC1-7):C07C39/10 |
主分类号 |
B01J27/00 |
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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