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    • 9. 发明申请
    • METHOD FOR CLEAVAGE OF BISPHENOL
    • 双酚的清除方法
    • WO01002331A1
    • 2001-01-11
    • PCT/JP2000/004429
    • 2000-07-04
    • C07B61/00C07C37/52C07C37/74C07C39/04C07C39/18C07C39/19
    • C07C37/52C07C39/04C07C39/19
    • A method for cleaving a bisphenol which comprises: (1) a cleavage step comprising feeding a mixture of a bisphenol and derivatives of chroman and flavan which are by-produced during the production of a bisphenol to a cleavage reactor and effecting cleavage reactions in the presence of a basic or acidic catalyst at 150 to 260 DEG C under a reduced pressure of 300 mmHg or less, (2) a distillation step comprising feeding the products of the cleavage reactions to a distillation column in a gaseous state and conducting a distillation at 130 to 200 DEG C under a reduced pressure of 300 mmHg or less, and (3) a reflux step comprising condensing the distillate from the distillation step, recycling a part of the resultant condensate to the distillation step at a reflux ratio of 0.01 to 3 and drawing out the rest of the condensate to the outside of the system. The method can be employed for producing a product containing isopropenyl phenol and phenol with high purity.
    • 一种用于切割双酚的方法,其包括:(1)切割步骤,包括将在双酚生产期间副产的双酚和苯并二氢吡喃和黄烷的衍生物的混合物进料到裂解反应器中并在存在下进行裂解反应 的碱性或酸性催化剂在150至260℃的压力为300mmHg或更低的压力下进行的蒸馏步骤;(2)蒸馏步骤,包括将裂解反应产物以气态进料至蒸馏塔,并在130℃下进行蒸馏 在300mmHg或更低的减压下至200℃,和(3)回流步骤,其包括将蒸馏步骤的馏出物冷凝,将一部分所得的冷凝物以0.01至3的回流比循环至蒸馏步骤;以及 将其余的冷凝液抽出到系统的外部。 该方法可用于生产含有高纯度的异丙烯基苯酚和苯酚的产物。