Anionic polymerization of lactams in an extruder with controlled output
rate
    22.
    发明授权
    Anionic polymerization of lactams in an extruder with controlled output rate 失效
    在具有受控输出速率的挤出机中阴离子聚合内酰胺

    公开(公告)号:US4067861A

    公开(公告)日:1978-01-10

    申请号:US627948

    申请日:1975-11-03

    摘要: Anionic polymerization of lactams is carried out in an extruder into which at least one lactam, at least one catalyst and at least one activating agent are introduced and wherein the mixture of said substances is polymerized prior to being extruded through an extrusion die. The output rate of the polymerized substance is controlled by transfer means, such as a metering pump, arranged between the outlet of the body of the extruder and the extrusion die.

    摘要翻译: 内酰胺的阴离子聚合在其中引入至少一种内酰胺,至少一种催化剂和至少一种活化剂的挤出机中进行,并且其中所述物质的混合物在通过挤出模头挤出之前被聚合。 聚合物质的输出速率由设置在挤出机主体的出口与挤出模头之间的传送装置如计量泵控制。

    Method for purifying lactams
    23.
    发明授权
    Method for purifying lactams 失效
    内酰胺纯化方法

    公开(公告)号:US3960846A

    公开(公告)日:1976-06-01

    申请号:US508020

    申请日:1974-09-20

    CPC分类号: C07D201/16

    摘要: The instant invention relates to a method for purifying lactams wherein the lactam to be purified is contacted in the fused state with inorganic adsorption agents.The said method comprises contacting the lactam to be purified in the fused state with an inorganic adsorbent, then separating the lactam from the adsorbent and regenerating said adsorbent if desired, wherein said adsorbent is impregnated with at least one impregnation compound selected from the group consisting of an acid and the alkali metal salts which are thermally stable and exert no action on the lactam at temperatures lower tha 250.degree.C.

    摘要翻译: 本发明涉及纯化内酰胺的方法,其中待纯化的内酰胺以熔融状态与无机吸附剂接触。