发明名称 |
Recovery of para-nitrosodium phenolate |
摘要 |
A process for preparing alkali metal salts of para-nitrophenol by contacting para-chloronitrobenzene with an aqueous solution of (1) aqueous caustic and (2) recycled filtrate and washing solution from the preparation of para-nitrophenol containing 5-20% by weight of said alkali metal salts at a temperature of from 180 DEG -250 DEG C. and at autogenous pressure in 30 seconds to 10 minutes with the mole ratio of caustic to chloronitrobenzene of from 2:1-4:1, caustic concentration in the aqueous solution of from 5-20%, the amount of recycle ranging from 5-45% by weight based on the aqueous solution.
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申请公布号 |
US4215227(A) |
申请公布日期 |
1980.07.29 |
申请号 |
US19780955505 |
申请日期 |
1978.10.27 |
申请人 |
DU PONT DE NEMOURS, E I & |
发明人 |
BOCKRATH, RICHARD E |
分类号 |
C07C205/22;(IPC1-7):C07C79/26 |
主分类号 |
C07C205/22 |
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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