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    • 82. 发明授权
    • Process for recovery of cumene hydroperoxide decomposition products by distillation
    • 通过蒸馏回收氢过氧化枯烯产物的方法
    • US07186866B1
    • 2007-03-06
    • US11273411
    • 2005-11-14
    • Scott R. KeenanAmber R. HarachJames G. Skipworth
    • Scott R. KeenanAmber R. HarachJames G. Skipworth
    • C07C49/20C07C37/68
    • C07C45/53C07C37/08C07C37/72C07C37/74C07C37/82C07C45/80C07C45/82C07C39/04
    • Products from the decomposition of cumene hydroperoxide (CHP) are recovered by distillation. The majority of the undesirable by-product acetol (hydroxyacetone) is removed from the phenol stream by distillation wherein the majority of the acetol is carried with an overheads stream comprising acetone, cumene and alphamethylstyrene (AMS). Acetol is subsequently separated from acetone by distillation wherein acetone is taken as an overheads stream and acetol remains with a bottoms stream comprising cumene, AMS and phenol. The acetol, along with residual phenol, is extracted from the cumene and AMS by counter-current washing with an aqueous alkali metal hydroxide. The phenol stream is then distilled to separate phenol from cumene, alphamethylstyrene and higher boiling compounds. The phenol, containing only a small amount of acetol, can then be treated to remove methylbenzofuran by treatment with an acidic resin or solid superacid catalyst without formation of significant amounts of additional methylbenzofuran.
    • 通过蒸馏回收氢过氧化枯烯(CHP)的分解产物。 通过蒸馏从苯酚流中除去大部分不合需要的副产物丙酮醇(羟基丙酮),其中大部分丙酮醇与包含丙酮,枯烯和α-甲基苯乙烯(AMS)的塔顶馏出物携带。 Acetol随后通过蒸馏与丙酮分离,其中将丙酮作为塔顶馏出物流,并且丙酮醇与含有异丙基苯,AMS和苯酚的塔底物流保留。 通过用碱金属氢氧化物水溶液逆流洗涤,从异丙苯和AMS中提取丙酮醇和残留的苯酚。 然后将苯酚流蒸馏以将苯酚与枯烯,α-甲基苯乙烯和较高沸点化合物分离。 然后可以用酸性树脂或固体超强酸催化剂处理除苯甲呋喃,只含少量丙酮醇,除去甲基苯并呋喃,不形成显着量的甲基苯并呋喃。
    • 84. 发明授权
    • Integrated process for the preparation of phenol from benzene with recycling of the by-products
    • 从苯中制备苯酚的副产物回收综合工艺
    • US07038093B2
    • 2006-05-02
    • US10716460
    • 2003-11-20
    • Daniele BianchiRossella BortoloRoberto BuzzoniAlberto CesanaLeonardo DalloroRino D'Aloisio
    • Daniele BianchiRossella BortoloRoberto BuzzoniAlberto CesanaLeonardo DalloroRino D'Aloisio
    • C07C37/00
    • C07C37/60B01J29/89B01J2229/30Y02P20/125Y02P20/52C07C39/04
    • The invention relates to a process for the preparation of phenol comprising the following phases: 1) preparation in continuous of phenol by means of the direct oxidation of benzene with hydrogen peroxide operating with an H2O2/benzene ratio ranging from 10 to 70%, in a three-phase reaction system comprising a first liquid phase consisting of benzene and an organic solvent, a second liquid phase consisting of water, a solid phase consisting of an activated catalyst based on titanium silicalite TS-1; 2) separation of the phenol and non-reacted benzene from the reaction mixture of the oxidation section (1), by means of fractionated distillation; 3) separation of the solvent and by-products from the mixture coming from the distillation tail (2), by means of basic extraction; 4) transformation of the by-products obtain in section (3) to phenol by means of hydrodeoxygenation with hydrogen operating in continuous, in aqueous solution, at a temperature ranging from 250 to 500° C., at pressures of 1-100 bar and in the presence of a catalyst based on elements of group VIB or their mixtures or group VIII of the periodic table or their mixtures; 5) recycling of the phenol obtained in section (4) to the distillation section (2).
    • 本发明涉及一种制备苯酚的方法,包括以下阶段:1)通过苯与氧化氢的直接氧化制备苯酚连续操作,所述过氧化氢用H 2 O 2 在含有由苯和有机溶剂组成的第一液相的三相反应体系中,第二液相由水组成,固相由活化的 基于钛硅沸石TS-1的催化剂; 2)通过分级蒸馏从氧化段(1)的反应混合物中分离苯酚和未反应的苯; 3)通过碱性萃取法从蒸馏尾料(2)中分离出溶剂和副产物与混合物; 4)将第(3)部分获得的副产物转化为苯酚,通过加氢脱氧,氢气在连续的水溶液中,在250-500℃的温度,1-100巴的压力和 在基于元素周期表VIB族元素或它们的混合物或VIII族元素或其混合物的催化剂的存在下; 5)将第(4)节中得到的酚再循环至蒸馏段(2)。