PROCESS FOR MAKING NITRILES
    1.
    发明公开
    PROCESS FOR MAKING NITRILES 有权
    制造硝酸盐的方法

    公开(公告)号:EP2574190A1

    公开(公告)日:2013-04-03

    申请号:EP11729809.1

    申请日:2011-06-16

    CPC classification number: C07C253/10 Y02P20/584 C07C255/04

    Abstract: An improved multi-reaction zone process provides for improved nitrile product quality and yield. In a first reaction zone, 1,3-butadiene is reacted with hydrogen cyanide in the presence of a catalyst to produce pentenenitriles comprising 3- pentenenitrile and 2-methyl-3-butenenitrile. In a second reaction zone, 2-methyl-3- butenenitrile, recovered from the first reaction zone, is isomerized to 3-pentenenitrile. In an optional third reaction zone, 3-pentenenitrile recovered from the first and second reaction zones is reacted with hydrogen cyanide in the presence of a catalyst and a Lewis acid to produce adiponitrile. A portion of the first catalyst is purified and recycled. Zero valent nickel is added to the purified first catalyst before it is recycled.

    Abstract translation: 改进的多反应区工艺提供改进的腈产品质量和产量。 在第一反应区中,1,3-丁二烯在催化剂存在下与氰化氢反应,生成包含3-戊烯腈和2-甲基-3-丁烯腈的戊烯腈。 在第二反应区中,将从第一反应区回收的2-甲基-3-丁烯腈异构化为3-戊烯腈。 在任选的第三反应区中,从催化剂和路易斯酸存在下,将从第一和第二反应区回收的3-戊烯腈与氰化氢反应生成己二腈。 第一催化剂的一部分被净化并再循环。 在再循环之前,将零价镍加入纯化的第一催化剂中。

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