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    • 4. 发明授权
    • Process for purifying acetone
    • 丙酮纯化方法
    • US4626600A
    • 1986-12-02
    • US703990
    • 1985-02-21
    • John W. FulmerWilliam D. Kight
    • John W. FulmerWilliam D. Kight
    • C07C45/53C07C45/80C07C45/81C07C45/82
    • C07C45/81C07C45/53C07C45/80C07C45/82
    • In accordance with the invention there is a process for reducing the water content of acetone prepared from cumene which includes the steps ofa. adding cleaving effective catalytic quantities of sulfuric acid to a mixture comprising cumene hydroperoxide and cumene, the cumene hydroperoxide making up about 81 to 83 weight percent of the said mixture, thereby producing a mixture comprising phenol, acetone, cumene and sulfuric acid;b. neutralizing the said sulfuric acid with an aqueous alkali hydroxide and separating the alkali metal sulfate from the mixture comprising phenol, acetone, water and cumene, the water being from about 40 to 60 weight percent of the total weight of water and cumene, the cumene being present in sufficient quantities to cause the formation of two liquid phases upon condensing the acetone fraction distillate;c. separating by distillation the acetone fraction from the phenol fraction, said acetone fraction containing acetone, water, aldehyde, and other organics including cumene;d. condensing the said acetone fraction, the said acetone fraction separating into two phases, the bottom phase having a substantial portion of the water and aldehyde present in the said acetone fraction, the upper phase having a substantial portion of the cumene of the said acetone fraction, the acetone being partitioned between the bottom phase and the upper phase;e. recycling at least a portion of the bottom phase to the vessel in which the sulfuric acid is neutralized andf. processing the upper phase to achieve a separation of the acetone and water.
    • 根据本发明,存在一种降低由枯烯制备的丙酮的水含量的方法,其包括以下步骤:a。 向包含氢过氧化异丙苯和异丙基苯的混合物中加入有效催化量的硫酸,氢过氧化异丙苯占所述混合物的约81-83%(重量),从而产生包含苯酚,丙酮,异丙基苯和硫酸的混合物; b。 用碱金属氢氧化物中和所述硫酸,并从包括苯酚,丙酮,水和枯烯的混合物中分离出碱金属硫酸盐,水为水和异丙基苯的总重量的约40至60重量%,枯烯为 存在足够的量以在冷凝丙酮馏分馏出物时形成两个液相; C。 通过蒸馏从苯酚馏分中蒸馏出丙酮馏分,所述丙酮馏分含有丙酮,水,醛和其它有机物,包括枯烯; d。 将所述丙酮馏分冷凝,将所述丙酮馏分分离成两相,底相具有存在于所述丙酮馏分中的大部分水和醛,上部相具有所述丙酮馏分的枯烯的相当大部分, 丙酮被分配在底相和上相之间; e。 将至少一部分底部相转移到其中硫酸中和的容器中。 加工上相以实现丙酮和水的分离。