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    • 4. 发明申请
    • PART-STREAM DISTILLATION
    • WO2014177507A1
    • 2014-11-06
    • PCT/EP2014/058579
    • 2014-04-28
    • BASF SETHE DOW CHEMICAL COMPANY
    • TELES, Joaquim HenriqueRIEDEL, DominicSEELIG, BiancaKAMPE, PhilipURBANCZYK, DanielWEBER, MarkusSCHRÖDER, AlexanderPARVULESCU, Andrei-NicolaeMÜLLER, UlrichWEIDENBACH, MeinolfWITZL, WernerBÄR, Holger
    • C07D301/12
    • C07D301/12B01D3/143C07D301/32
    • A continuous process for the preparation of propylene oxide, comprising(a) reacting propene, optionally admixed with propane, with hydrogen peroxide in a reaction apparatus in the presence of acetonitrile as solvent, obtaining a stream S0 containing propylene oxide, acetonitrile, water, at least one further component B, optionally propene and optionally propane, wherein the normal boiling point of the at least one component B is higher than the normal boiling point of acetonitrile and wherein the decadic logarithm of the octanol-water partition coefficient (log K ow ) of the at least one component B is greater than zero; (b) separating propylene oxidefrom S0, obtaining a stream S1 containing acetonitrile, water and the at least one further component B; (c) dividing S1 into two streams S2 and S3;(d) subjecting S3 to a vapor-liquid fractionation in a fractionation unit, obtaining a vapor fraction stream S4 being depleted of the at least one component B; (e) recycling at least a portion of S4, optionally after work-up, to (a).
    • 一种用于制备环氧丙烷的连续方法,包括(a)在乙腈作为溶剂的存在下,在反应装置中将丙烯任选与丙烷混合,与过氧化氢反应,得到含有环氧丙烷,乙腈,水的流S0 至少一种另外的组分B,任选的丙烯和任选的丙烷,其中至少一种组分B的标准沸点高于乙腈的标准沸点,其中辛醇 - 水分配系数(log Kow)的十进制对数 所述至少一个组分B大于零; (b)从S0分离环氧丙烷,得到含有乙腈,水和至少一种其它组分B的料流S1; (c)将S1分成两股流S2和S3;(d)对S3进行分馏装置中的气 - 液分馏,得到耗尽至少一种B成分的蒸汽馏分流S4; (e)将至少一部分S4,任选地在后处理之后再循环至(a)。