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    • 7. 发明授权
    • Process for producing aromatic hydroxylic compound
    • 制备芳香族羟基化合物的方法
    • US5475157A
    • 1995-12-12
    • US256245
    • 1994-09-02
    • Shintaro ArakiHiroshi IwasakiHiroyasu OhnoIsao HashimotoTeruaki Mukaiyama
    • Shintaro ArakiHiroshi IwasakiHiroyasu OhnoIsao HashimotoTeruaki Mukaiyama
    • C07C37/08C07C45/53
    • C07C37/08Y02P20/52
    • There is disclosed a process for producing an aromatic hydroxylic compound by acid decomposition of a hydroperoxide having the general formula (I) ##STR1## wherein Ar represents an aromatic hydrocarbon group having a valence of n; and n represents an integer of 1 or 2, in the presence of an acid catalyst, thereby to provide an aromatic hydroxylic compound having the general formula (II)Ar--(OH)n (II)wherein Ar and n are the same as above defined, characterized in that tetrafluoroboric acid, hexafluorosilicic acid or hexafluorophosphoric acid is used as the acid catalyst. According to this process, the aromatic hydroxylic compound is obtained in a high yield while the by-production of hydroxyacetone is effectively suppressed. In paricular, a more effective suppression of by-production of hydroxyacetone and a higher yield of the target compound can be achieved by carrying out the acid decomposition reaction in two stages wherein the first stage of the reaction is carried out in the first reactor at a temperature of 50.degree.-95.degree. C., the resultant reaction mixture is sent to the second reactor, and the second stage of the reaction is then carried out in the second reactor at a temperature of 80.degree.-120.degree. C.
    • PCT No.PCT / JP93 / 01586 Sec。 371日期:1994年9月2日 102(e)1994年9月2日PCT 1993年11月1日PCT公布。 公开号WO94 / 10115 PCT 日本公报1994年5月11日。公开了通过酸分解具有通式(I)c的化合价n为n的烃基的氢过氧化物制备芳族羟基化合物的方法。 并且n表示1或2的整数,在酸催化剂的存在下,由此提供具有通式(II)的Ar-(OH)n(II)的芳族羟基化合物,其中Ar和n与上述相同 其特征在于使用四氟硼酸,六氟硅酸或六氟磷酸作为酸催化剂。 根据该方法,以高产率获得芳族羟基化合物,同时有效抑制羟基丙酮的副产物。 在这种情况下,可以通过在两个阶段中进行酸分解反应来实现对羟基丙酮的副产物的更有效抑制和目标化合物的较高产率,其中反应的第一阶段在第一反应器中以 温度为50-95℃,将所得反应混合物送至第二反应器,然后在第二反应器中在80-120℃的温度下进行第二阶段反应。