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    • 44. 发明授权
    • Method for producing 3-pentenenitrile
    • 3-戊烯腈的制备方法
    • US07541486B2
    • 2009-06-02
    • US10586007
    • 2005-01-27
    • Jens ScheidelTim JungkampMichael BartschGerd HaderleinRobert BaumannHermann Luyken
    • Jens ScheidelTim JungkampMichael BartschGerd HaderleinRobert BaumannHermann Luyken
    • C07C255/00C07C253/00
    • C07C253/10C07C253/34C07C255/07
    • A process is described for preparing 3-pentenenitrile, characterized by the following process steps: (a) reacting 1,3-butadiene with hydrogen cyanide over at least one catalyst to obtain a stream 1 which comprises 3-pentenenitrile, 2-methyl-3-butenenitrile, the at least one catalyst and 1,3-butadiene, (b) distilling stream 1 in a column to obtain a high-1,3-butadiene stream 2 as the top product and a low-1,3-butadiene stream 3 as the bottom product which comprises 3-pentenenitrile, the at least one catalyst and 2-methyl-3-butenenitrile, (c) distilling stream 3 in a column to obtain a stream 4 as the top product which comprises 1,3-butadiene, a stream 5 which comprises 3-pentenenitrile and 2-methyl-3-butenenitrile at a side draw of the column, and a stream 6 as the bottom product which comprises the at least one catalyst, (d) distilling stream 5 to obtain a stream 7 as the top product which comprises 2-methyl-3-butenenitrile, and a stream 8 as the bottom product which comprises 3-pentenenitrile.
    • 描述了一种制备3-戊烯腈的方法,其特征在于以下工艺步骤:(a)使1,3-丁二烯与氰化氢在至少一种催化剂上反应,得到流1,其包含3-戊烯腈,2-甲基-3 丁烯腈,至少一种催化剂和1,3-丁二烯,(b)在塔中蒸馏物流1,得到作为顶部产物的高-1,3-丁二烯流2和低-1,3-丁二烯流 3作为底部产物,其包含3-戊烯腈,至少一种催化剂和2-甲基-3-丁烯腈,(c)在塔中蒸馏流3以获得作为顶部产物的料流4,其包含1,3-丁二烯 ,在塔的侧馏分中包含3-戊烯腈和2-甲基-3-丁烯腈的料流5和作为底部产物的料流6,其包含至少一种催化剂,(d)蒸馏流5以获得 流7作为顶部产物,其包含2-甲基-3-丁烯腈,以及作为底部产物的料流8,其包含3-戊烯 腈