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    • 10. 发明授权
    • Process for production of cresols
    • 甲酚生产工艺
    • US5399791A
    • 1995-03-21
    • US202160
    • 1994-02-25
    • Kiyoshi IkimiYoichi IkedaAkira MurakamiKazushige OkamotoTooru TokumaruMotoo Hazama
    • Kiyoshi IkimiYoichi IkedaAkira MurakamiKazushige OkamotoTooru TokumaruMotoo Hazama
    • C07C39/07C07C37/08C07C37/06
    • C07C39/07
    • There is disclosed a process for the production of cresols, including the steps of: (a) conducting oxygenation of cymene with oxygen gas or an oxygen-containing gas without any addition of an alkali, thereby obtaining a solution of oxygenation products containing tertiary and primary hydroperoxides of cymene; (b) washing the solution of oxygenation products obtained in step (a) with an aqueous alkali solution at a temperature in the range of from 10.degree. to 95.degree. C.; (c) subjecting the solution of oxygenation products obtained in step (b) to hydrogenation at a temperature in the range of from 60.degree. to 100.degree. C. to decrease the content of primary hydroperoxide in such a manner that the weight ratio of primary hydroperoxide to tertiary hydroperoxide is not greater than 1/25 (w/w); (d) subjecting the solution treated in step (c) to decomposition in the presence of a catalyst; and (e) subjecting the solution treated in step (d) to hydrogenation to obtain cresols.
    • 公开了一种生产甲酚的方法,包括以下步骤:(a)在不加碱的条件下,用氧气或含氧气体进行甲基异丙基苯的氧化反应,从而得到含有叔, 伞形氢过氧化物; (b)在10℃至95℃的温度范围内用碱水溶液洗涤步骤(a)中获得的氧合产物的溶液; (c)将步骤(b)中获得的氧合产物溶液在60℃至100℃的温度范围内进行氢化,以降低初级氢过氧化物的含量,使得初级氢过氧化物的重量比 叔氢过氧化物不大于1/25(w / w); (d)使在步骤(c)中处理的溶液在催化剂存在下进行分解; 和(e)使步骤(d)中处理的溶液进行氢化以获得甲酚。