Method of separating isobutylene from a C-4 hydrocarbon fraction using a
heteropoly acid on an inert support
    71.
    发明授权
    Method of separating isobutylene from a C-4 hydrocarbon fraction using a heteropoly acid on an inert support 失效
    使用杂多酸在惰性载体上从C-4烃馏分分离异丁烯的方法

    公开(公告)号:US5177301A

    公开(公告)日:1993-01-05

    申请号:US822803

    申请日:1992-01-21

    申请人: John F. Knifton

    发明人: John F. Knifton

    IPC分类号: C07C7/148

    CPC分类号: C07C7/14891

    摘要: Disclosed is a two-step method for separating isobutylene from a C-4 hydrocarbon fraction comprising:a) Reacting the C-4 fraction with a glycol in the presence of a catalyst comprising heteropoly acid on an inert support at a temperature of about 60.degree. to 160.degree. C. to yield the corresponding glycol mono-t-butyl ether, and subsequentlyb) reacting the intermediate glycol ether product over the same class of catalyst at a temperature of about 100.degree. to 220.degree. C. to regenerate the isolatable isobutylene.

    摘要翻译: 公开了一种用于从C-4烃馏分分离异丁烯的两步法,其包括:a)在约60℃的温度下在惰性载体上,在包含杂多酸的催化剂存在下,用二醇反应C-4馏分 至160℃以产生相应的二醇单叔丁基醚,随后b)在约100℃至220℃的温度下使中间体二醇醚产物在相同类别的催化剂上反应以再生可分离的异丁烯 。

    Aliphatic polyurea elastomers
    73.
    发明授权
    Aliphatic polyurea elastomers 失效
    ALIPHATIC POLYUREA弹性体

    公开(公告)号:US5162388A

    公开(公告)日:1992-11-10

    申请号:US709931

    申请日:1991-06-04

    摘要: An aliphatic polyurea elastomer is disclosed. The elastomer comprises an (A) and a (B) component. The (A) component includes an aliphatic isocyanate. The (B) component includes an amine terminated polyoxyalkylene polyol and a chain extender including an aliphatic spray polyurea elastomer comprising an (a) component which includes an aliphatic isocyanate and a (b) component which includes (1) an amine terminated polyoxyalkylene polyol and (2) a chain extender including cis-1,4-diaminocyclohexane, isophoronediamine, m-xylenediamine, 4,4'-methylenedicyclohexylamine, methanediamine, 1,4-diaminoethylcyclohexane and substituted derivatives thereof. Preferably, the chain extender includes cis-1,4-diaminocyclohexane, isophoronediamine or mixtures thereof.

    Cyanoethylation of alcohols
    75.
    发明授权
    Cyanoethylation of alcohols 失效
    醇的氰基乙基化

    公开(公告)号:US5159101A

    公开(公告)日:1992-10-27

    申请号:US833199

    申请日:1992-02-10

    IPC分类号: C07C255/13

    CPC分类号: C07C255/13

    摘要: Disclosed is a process wherein cyanoethylation is accomplished by reacting a compound of the formula: ##STR1## where R=H or CH.sub.3, n=1 to 3 and m=0 to 50, and acrylonitrile over a heterogeneous catalyst comprising, potassium fluoride or cesium fluoride supported on an oxide of an element from the group consisting of Group IA, IIA or IIIA of the Periodic Table.

    摘要翻译: 公开了一种方法,其中氰基乙基化是通过使下式化合物(其中R = H或CH 3,n = 1-3和m = 0至50)与丙烯腈反应,在包含氟化钾或铯 氟化物负载在元素的氧化物上,该元素来自元素周期表的IA,IIA或IIIA族元素。