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    • 65. 发明授权
    • Method of recovering boric acid
    • 回收硼酸的方法
    • US4329154A
    • 1982-05-11
    • US40174
    • 1979-05-18
    • Kanji ShonoTokio KitohHiroshi SanoTakashi Hironaka
    • Kanji ShonoTokio KitohHiroshi SanoTakashi Hironaka
    • B01D9/02C01B35/10
    • C01B35/06C01B35/10
    • Boric acid is recovered from a water phase separated after hydrolyzing the reaction mixture obtained by oxidizing cyclohexane in the presence of a catalyst of boric acid. The method comprises(a) a concentration-crystallization step of concentrating the water phase by heating it and crystallizing boric acid;(b) a concentrating step of separating crystals of boric acid from the slurry obtained by the step (a) and then controlling the water content of the mother liquor to 20 to 50 wt. %;(c) a cooling-crystallization step of cooling the concentrated solution obtained by the step (b) under a reduced pressure to crystallize boric acid; and(d) a boric acid recycling step of separating crystals of boric acid separated from the slurry obtained by the step (c) and then, recycling the boric acid to the step (a).
    • 在水解通过在硼酸催化剂存在下氧化环己烷获得的反应混合物之后分离的水相中回收硼酸。 该方法包括(a)浓缩 - 结晶步骤,通过加热和结晶硼酸浓缩水相; (b)从步骤(a)得到的浆料中分离出硼酸晶体,然后将母液的含水量控制在20〜50重量%的浓缩工序。 %; (c)冷却结晶步骤,在减压下冷却由步骤(b)获得的浓缩溶液以结晶硼酸; 和(d)硼酸再循环步骤,分离由步骤(c)获得的浆料分离的硼酸晶体,然后将硼酸再循环到步骤(a)。