发明名称 |
Process for producing 4,4'-dihydroxybiphenyl |
摘要 |
4,4'-Dihydroxybiphenyl is produced by hydrolyzing 4,4'-dibromobiphenyl in the presence of a copper compound catalyst in an alkaline aqueous solution; extracting by-products from the alkaline aqueous solution with an alcohol or ketone which forms an organic phase; neutralizing or acidifying the alkaline aqueous solution with an acid; extracting the reaction product with the specific solvent; and crystallizing the reaction product from the extracted solution to obtain 4,4'-dihydroxybiphenyl having high purity.
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申请公布号 |
US4340768(A) |
申请公布日期 |
1982.07.20 |
申请号 |
US19800196756 |
申请日期 |
1980.10.14 |
申请人 |
HODOGAYA CHEMICAL CO., LTD. |
发明人 |
JINBO, SUSUMU;KOHNO, SHOICHI;ONISHI, MASATOSHI |
分类号 |
C07C27/00;C07C37/02;C07C37/68;C07C37/72;C07C39/15;C07C67/00;(IPC1-7):C07C37/02;C07C37/84 |
主分类号 |
C07C27/00 |
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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