PART-STREAM DISTILLATION
    55.
    发明公开
    PART-STREAM DISTILLATION 有权
    TEILSTROMDESTILLATION

    公开(公告)号:EP2991970A1

    公开(公告)日:2016-03-09

    申请号:EP14719778.4

    申请日:2014-04-28

    CPC classification number: C07D301/12 B01D3/143 C07D301/32

    Abstract: 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).

    Abstract translation: 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一起与过氧化氢反应,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划分成两个流S2和S3; (d)使S3在分馏装置中进行汽 - 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)。

    VERFAHREN ZUR AUFARBEITUNG EINES BUTEN- UND/ODER BUTADIEN ENTHALTENDEN STOFFSTROMS
    57.
    发明公开
    VERFAHREN ZUR AUFARBEITUNG EINES BUTEN- UND/ODER BUTADIEN ENTHALTENDEN STOFFSTROMS 有权
    VERFAHREN ZUR AUFARBEITUNG EINES BUTEN - UND / ODER BUTADIEN ENTHALTENDEN STOFFSTROMS

    公开(公告)号:EP2681178A1

    公开(公告)日:2014-01-08

    申请号:EP12706605.8

    申请日:2012-03-02

    Applicant: BASF SE

    CPC classification number: B01D3/40 C07C7/04 C07C7/08 C07C7/11 C07C11/16 C07C11/167

    Abstract: The invention relates to a process for workup of a stream (1) comprising butene and/or butadiene, butane, hydrogen and/or nitrogen and carbon dioxide, comprising the following steps: (a) absorption of the stream (1) comprising butene and/or butadiene, butane, hydrogen and/or nitrogen, with or without carbon dioxide, with a mixture (5) comprising 80 to 97% by weight of N-methylpyrrolidone and 3 to 20% by weight of water to obtain a stream (9) comprising N-methylpyrrolidone, water, butene and/or butadiene, and butane, with or without carbon dioxide, and a stream (7) comprising hydrogen and/or nitrogen and butane, (b) extractive distillation of the stream (9) comprising N-methylpyrrolidone, water, butene and/or butadiene, and butane, with or without carbon dioxide, with a stream (13) comprising 80 to 97% by weight of N-methylpyrrolidone and 3 to 20% by weight of water to separate the stream (9) comprising N-methylpyrrolidone, water, butene and/or butadiene, and butane, with or without carbon dioxide, into a stream (17) comprising N-methylpyrrolidone, water, butene and/or butadiene, and a stream (15) comprising essentially butane, with or without carbon dioxide, (c) distillation of the stream (17) comprising N-methylpyrrolidone, water, butene and/or butadiene into a stream (23) comprising essentially N-methylpyrrolidone and water, and a stream (21) comprising butene and/or butadiene.

    Abstract translation: 本发明涉及包含丁烯和/或丁二烯,丁烷,氢气和/或氮气和二氧化碳的物流(1)的处理方法,其包括以下步骤:(a)将包含丁烯和 (5)包含80-97重量%的N-甲基吡咯烷酮和3-20重量%的水以获得流(9),所述混合物(5)包含具有或不具有二氧化碳的丁二烯,丁烷,氢和/ )包含N-甲基吡咯烷酮,水,丁烯和/或丁二烯和丁烷(含有或不含二氧化碳)以及包含氢和/或氮和丁烷的物流(7),(b)物流(9)的萃取蒸馏包含 (13)包含80-97重量%的N-甲基吡咯烷酮和3-20重量%的水以分离含有或不含二氧化碳的N-甲基吡咯烷酮,水,丁烯和/或丁二烯和丁烷, 包含N-甲基吡咯烷酮,水,丁烯和/或丁二烯和丁烷的物流(9),有或没有汽车 (17),包含N-甲基吡咯烷酮,水,丁烯和/或丁二烯,以及基本上包含丁烷的物流(15),其中含有或不含有二氧化碳,(c)蒸馏包含N (23)和包含丁烯和/或丁二烯的物流(21),所述物流(23)基本上包含N-甲基吡咯烷酮和水。

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