Process for the preparation of 1,2,4-triazole
    2.
    发明授权
    Process for the preparation of 1,2,4-triazole 失效
    制备1,2,4-三唑的方法

    公开(公告)号:US4267346A

    公开(公告)日:1981-05-12

    申请号:US612

    申请日:1979-01-02

    IPC分类号: C07D249/08

    CPC分类号: C07D249/08

    摘要: A process for preparing 1,2,4-triazole which comprises contacting hydrazine with formamide in the molar ratio of 1:2.0-2.7 at a temperature from 100.degree. to 250.degree. C. in the presence of ammonia.

    摘要翻译: 一种制备1,2,4-三唑的方法,其包括在氨存在下,在100-250℃的温度下,使肼与甲酰胺以1:2.0-2.7的摩尔比接触。

    Chlorination of polyolefins in the presence of complex formers
    3.
    发明授权
    Chlorination of polyolefins in the presence of complex formers 失效
    在复合成型剂存在下氯化聚烯烃

    公开(公告)号:US4165431A

    公开(公告)日:1979-08-21

    申请号:US881675

    申请日:1978-02-27

    IPC分类号: C08F8/00 C08F8/20 C08F8/22

    CPC分类号: C08F8/22

    摘要: A chlorinated colorless polyolefin, preferably a chlorinated colorless isotactic polypropylene, soluble in carbon tetrachloride and having a chlorine content of from 60% to 70% by weight and an average degree of polymerization of from 2000 to 6000, produced by chlorinating polyolefins having a degree of polymerization of from 2000 to 20,000 in suspension or solution or in suspension and solution at 40 to 60.degree. C. in the presence of a halogen transfer agent, a chlorination catalyst and from 0.2 to 0.5% by weight, based on polyolefin, of at least one compound corresponding to the general Formula (I):h.sub.2 n--r--nh>.sub.n H (I)in which R represents the ethylene, propylene or butylene group and n=1-6.

    摘要翻译: 氯化无色聚烯烃,优选氯化无色全同立构聚丙烯,其可溶于四氯化碳,氯含量为60〜70重量%,平均聚合度为2000〜6000,通过氯化具有一定程度的聚烯烃 在卤素转移剂,氯化催化剂和基于聚烯烃的0.2至0.5重量%的存在下,在悬浮液或溶液中或悬浮液和溶液中在40至60℃下聚合2000至20,000,至少 对应于通式(I)的一种化合物: