Preparation of aromatic or heteroaromatic nitriles
    1.
    发明授权
    Preparation of aromatic or heteroaromatic nitriles 失效
    芳香族或杂芳族腈的制备

    公开(公告)号:US5952262A

    公开(公告)日:1999-09-14

    申请号:US723915

    申请日:1996-09-30

    摘要: Preparation of aromatic or heteroaromatic nitrites of the formula I ##STR1## where X is nitrogen or C-R.sup.6 and all of the R substituents represent hydrogen, alkyl, halogen, nitro, amino or similar groups, provided at least one substituent is a cyano or alkylcyano group. The nitrites I are produced by reacting aromatic or heteroaromatic hydrocarbons of the formula II ##STR2## where X is nitrogen or C-R.sup.6, provided at least one substituent is C.sub.1 -C.sub.8 -alkyl, with ammonia and oxygen at 200 to 600.degree. C. under a pressure of 0.1 to 5 bar in the gas phase over a supported catalyst containing 0.5 to 20% by weight of vanadium oxide. The supported catalyst consists of from 2 to 30 particle fractions whose mean diameters differ by from 10 to 80% and the supporting carrier of the catalyst has a bulk density of 0.6 to 1.2 kg/liter.

    摘要翻译: 制备式I的芳族或杂芳族亚硝酸盐,其中X是氮或C-R6,所有R取代基代表氢,烷基,卤素,硝基,氨基或类似基团,提供至少一个取代基是氰基或烷基氰基。 亚硝酸盐I通过使式II的芳族或杂芳族化合物(其中X是氮或C-R 6)提供,其中至少一个取代基是C 1 -C 8 - 烷基,氨和氧在200-600℃的压力下 在含有0.5至20重量%氧化钒的负载型催化剂的气相中为0.1至5巴。 载体催化剂由2至30个颗粒级分组成,其平均直径为10至80%,催化剂的载体载体的堆积密度为0.6至1.2kg /升。

    Process for the preparation of aliphatic polycarbonates with alkoxy
silane initiator
    5.
    发明授权
    Process for the preparation of aliphatic polycarbonates with alkoxy silane initiator 失效
    用烷氧基硅烷引发剂制备脂族聚碳酸酯的方法

    公开(公告)号:US4879367A

    公开(公告)日:1989-11-07

    申请号:US212817

    申请日:1988-06-29

    CPC分类号: C08G64/30 C08G64/0208

    摘要: Process for the preparation of aliphatic polycarbonates by polymerizing cyclic aliphatic carbonates in the presence of initiators and/or catalysts, in which the initiators used are alkoxy silanes of the formula ##STR1## in which R.sub.1, R.sub.2 and R.sub.3 independently of one another represent a C.sub.1 -C.sub.4 -alkyl radical, n is an interger from 1 to 6 andR.sub.4 denotes an n-valent, optionally substituted, aliphatic hydrocarbon radical,and the catalysts used are the nucleophilic catalysts which are known from group transfer polymerization.

    摘要翻译: 用于通过在引发剂和/或催化剂存在下聚合环状脂肪族碳酸酯来制备脂族聚碳酸酯的方法,其中使用的引发剂是式I的烷氧基硅烷,其中R 1,R 2和R 3彼此独立地表示 C 1 -C 4 - 烷基,n是1至6的整数,R 4表示n价任选取代的脂族烃基,所用的催化剂是从组转移聚合中已知的亲核催化剂。

    Process for separating aniline derivatives
    7.
    发明授权
    Process for separating aniline derivatives 失效
    苯胺衍生物分离方法

    公开(公告)号:US4918232A

    公开(公告)日:1990-04-17

    申请号:US213069

    申请日:1988-06-29

    CPC分类号: C07C209/86

    摘要: A process for separating from each other aniline and aniline derivatives having different numbers of C atoms bound to the N atoms is disclosed herein, this process being characterized in that a mixture of the substances mentioned is treated in liquid phase with zeolites of the faujasite type at a temperature from 0.degree. C. to 190.degree. C.

    摘要翻译: 本文公开了一种彼此分离的苯胺和与N原子结合的C原子数不同的苯胺衍生物的方法,该方法的特征在于所述物质的混合物用八面沸石沸石沸石处理 温度为0℃至190℃