Process for removing water from a mixture containing water and zinc chloride
    42.
    发明申请
    Process for removing water from a mixture containing water and zinc chloride 失效
    从含水和氯化锌的混合物中除去水的方法

    公开(公告)号:US20050207968A1

    公开(公告)日:2005-09-22

    申请号:US10519513

    申请日:2003-07-04

    摘要: A process for the removal of water from a mixture comprising water and zinc chloride, which comprises adding to said mixture comprising water and zinc chloride an aprotic, polar diluent whose boiling point in the case where an azeotrope is not formed between said diluent and water under the pressure conditions of the distillation mentioned below is higher than the boiling point of water and which is in liquid form at this boiling point of water or which forms an azeotrope or heteroazeotrope with water under the pressure and temperature conditions of the distillation mentioned below, and distilling the mixture comprising water, zinc chloride and the diluent with removal of water or said azeotrope or said heteroazeotrope from this mixture, giving an anhydrous mixture comprising zinc chloride and said diluent.

    摘要翻译: 一种用于从包含水和氯化锌的混合物中除去水的方法,其包括向包含水和氯化锌的所述混合物中加入非质子极性稀释剂,其中在所述稀释剂和水之间未形成共沸物的情况下为沸点 下述蒸馏的压力条件高于水的沸点,并且在该沸点沸点下为液体形式,或者在下述蒸馏的压力和温度条件下与水形成共沸物或杂合物,并且 从该混合物中除去包含水,氯化锌和稀释剂的混合物,除去水或所述共沸物或所述杂共聚物,得到包含氯化锌和所述稀释剂的无水混合物。

    Method for producing 3-pentenenitrile
    44.
    发明授权
    Method for producing 3-pentenenitrile 有权
    3-戊烯腈的制备方法

    公开(公告)号:US07541486B2

    公开(公告)日:2009-06-02

    申请号:US10586007

    申请日:2005-01-27

    IPC分类号: C07C255/00 C07C253/00

    摘要: 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.

    摘要翻译: 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