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    • 3. 发明授权
    • Process for producing dihydroxybenzene
    • 二羟基苯的制备方法
    • US06423876B1
    • 2002-07-23
    • US10062724
    • 2002-02-05
    • Shigefumi Tokumasu
    • Shigefumi Tokumasu
    • C07C2710
    • C07C39/08C07C407/00C07C409/12
    • There is provided a process for producing dihydroxybenzene, which comprises the steps of: (1) oxidizing diisopropylbenzene to obtain a reaction mixture containing di(2-dihydroperoxy-2-propyl)benzene; (2) cleaving di(2-dihydroperoxy-2-propyl)benzene in the reaction mixture to obtain a mixture containing crude dihydroxybenzene; (3) distilling the mixture containing crude dihydroxybenzene to obtain a fraction containing acetone from a low boiling side, and a fraction containing dihydroxybenzene from a high boiling side; (4) distilling the fraction containing dihydroxybenzene obtained in the above-mentioned step (3) to obtain a fraction containing dihydroxybenzene from a low boiling side, and a fraction containing heavy material from a high boiling side; and (5) mixing the fraction containing dihydroxybenzene obtained in the above-mentioned step (4) with water, and contacting the resulting mixture with an extraction solvent, followed by separating into an aqueous layer containing dihydroxybenzene and an oily layer containing impurity.
    • 提供二羟基苯的制备方法,其包括以下步骤:(1)氧化二异丙苯以得到含有二(2-二氢过氧-2-丙基)苯的反应混合物;(2)将二(2-二氢过氧-2-丙基) 丙基)苯,得到含有粗二羟基苯的混合物;(3)蒸馏含有粗二羟基苯的混合物,从低沸点得到含丙酮的馏分,以及从高沸点侧含有二羟基苯的馏分;(4) 蒸馏上述步骤(3)中得到的含有二羟基苯的馏分,从低沸点得到含有二羟基苯的馏分,以及含有高沸点重质的馏分; 和(5)将上述步骤(4)中得到的含有二羟基苯的级分与水混合,并将所得混合物与萃取溶剂接触,然后分离成含有二羟基苯和含有杂质的油层的水层。