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    • 4. 发明授权
    • Recovery of para-nitrosodium phenolate
    • 对硝基苯酚钠的回收
    • US4215227A
    • 1980-07-29
    • US955505
    • 1978-10-27
    • Richard E. Bockrath
    • Richard E. Bockrath
    • C07C205/22C07C79/26
    • C07C201/12
    • 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.degree.-250.degree. 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.
    • 通过使对氯硝基苯与(1)苛性碱水溶液和(2)再循环的滤液和洗涤溶液从制备含有5-20重量%的对硝基苯酚的洗涤溶液接触来制备对硝基苯酚的碱金属盐的方法 所述碱金属盐的温度为180-250℃,自生压力为30秒至10分钟,苛性碱与氯硝基苯的摩尔比为2:1-4:1,水溶液中的苛性碱浓度 为5-20%,循环量为5-45重量%,基于水溶液。