Preparation of caprolactam
    1.
    发明授权
    Preparation of caprolactam 失效
    己内酰胺的制备

    公开(公告)号:US4963672A

    公开(公告)日:1990-10-16

    申请号:US448899

    申请日:1989-12-12

    CPC分类号: C07D201/08 Y02P20/52

    摘要: Caprolactam is prepared in a process comprising the following steps:(a) reacting the 5-formylvaleric ester with liquid ammonia as reaction medium and hydrogen in the presence of a ruthenium catalyst in liquid phase at from 80.degree. to 140.degree. C. under a hydrogen partial pressure of from 40 to 100 bar,(b) replacing the reaction medium ammonia by an aromatic hydrocarbon having a boiling point of from 80.degree. to 240.degree. C. which is liquid under the reaction conditions,(c) heating the resulting mixture in liquid phase under superatmospheric pressure at 230.degree.-350.degree. C. to form caprolactam, and(d) isolating caprolactam from the resulting reaction mixture.

    摘要翻译: 己内酰胺以包括以下步骤的方法制备:(a)使5-甲酰基戊酸酯与液氨作为反应介质和氢在钌催化剂存在下在液相中在80-140℃下在氢气 分压为40〜100巴,(b)在反应条件下用沸点为80〜240℃的芳烃替代反应介质氨,(c)将所得混合物加热 液相在超大气压下在230-350℃下反应形成己内酰胺,和(d)从所得反应混合物中分离己内酰胺。

    Preparation of caprolactam from 6-aminocaproic acid, esters and amides
    10.
    发明授权
    Preparation of caprolactam from 6-aminocaproic acid, esters and amides 失效
    从6-氨基己酸,酯和酰胺制备己内酰胺

    公开(公告)号:US4767856A

    公开(公告)日:1988-08-30

    申请号:US133274

    申请日:1987-12-15

    IPC分类号: C07D201/08 C07D201/16

    CPC分类号: C07D201/08

    摘要: In an improved process for preparing caprolactam by heating 6-aminocaproic acid, an ester or amide or mixture thereof in the presence of an inert reaction medium which is liquid under the reaction conditions and has a boiling point above that of caprolactam, the improvement comprises using as the reaction medium a hydrocarbon, maintaining a temperature of from 150.degree. to 350.degree. C., charging the 6-aminocaproic acid, ester, amide or mixture thereof at a rate commensurate with their rate of conversion, and separating caprolactam from the reaction mixture at a rate commensurate with its rate of formation.

    摘要翻译: 在通过在反应条件下为液体并且沸点高于己内酰胺的惰性反应介质的惰性反应介质的存在下加热6-氨基己酸,酯或酰胺或其混合物来制备己内酰胺的改进方法中,改进包括使用 作为反应介质,将烃保持在150℃至350℃的温度下,以与其转化速率相称的速率加入6-氨基己酸,酯,酰胺或其混合物,并将己内酰胺与反应混合物分离 其速度与其形成速度相称。