发明名称 |
Process for producing dichlorodiphenylsulfone. |
摘要 |
<p>Dichlorodiphenylsulfone is prepared with an enhanced yield by (1) dehydration-condensing chlorobenzene with 4-chlorobenzenesulfonic acid; (2) adding water to the resultant reaction product mixture in a 4-chlorobenzenesulfonic acid/water molar ratio of 1:0.8 to 1:2 to convert the non-reacted 4-chlorobenzenesulfonic acid to monohydrate thereof and allow the resultant monohydrate to precipitate; (3) recovering the precipitated 4-chlorobenzenesulfonic acid monohydrate; (4) collecting the reaction product consisting of dichlorodiphenylsulfone; and optionally (5) dehydrating the recovered 4-chlorobenzenesulfonic acid monohydrate and returning the dehydrated 4-chlorobenzenesulfonic acid to the dehydration-condensing step (1).</p> |
申请公布号 |
EP0592875(A1) |
申请公布日期 |
1994.04.20 |
申请号 |
EP19930115782 |
申请日期 |
1993.09.30 |
申请人 |
UBE INDUSTRIES, LTD. |
发明人 |
KASHIMA, MIKITO;NODA, YUMIKI;AKIBA, YOSHIKAZU |
分类号 |
C07C315/00;C07C315/06;C07C317/14;(IPC1-7):C07C315/00 |
主分类号 |
C07C315/00 |
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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