Liquid composition containing diisocyanate of diphenylurethane
    2.
    发明授权
    Liquid composition containing diisocyanate of diphenylurethane 失效
    含二苯基氨基甲酸二异氰酸酯的液体组合物

    公开(公告)号:US4650899A

    公开(公告)日:1987-03-17

    申请号:US603964

    申请日:1984-04-26

    CPC分类号: C07C265/14 C08G18/7671

    摘要: A liquid composition comprising a mixture of isomers of essentially diisocyanates having the diphenylmethane structure, the distribution by weight of isomers in the composition for each 100 parts by weight of the composition being:32 to 55% of the 4,4' isomer,30 to 45% of the 2,4' isomer,5 to 12% of the 3,4' isomer,4 to 10% of the 2,2' isomer, and2 to 5% of the 2,3' isomer;and the method of making the composition by first reacting a benzyl halide with benzene, followed by nitration, hydrogenation, and phosgenation.

    摘要翻译: 一种液体组合物,其包含具有二苯基甲烷结构的基本上二异氰酸酯的异构体混合物,组合物中异构体的重量分别为每100重量份组合物为:32-55%的4,4'异构体,30至 2,4'异构体的45%,3,4'异构体的5〜12%,2,2'异构体的4〜10%,2,3'异构体的2〜5%。 以及首先使苄基卤与苯反应,然后进行硝化,氢化和光气化来制备组合物的方法。

    Separation of isomers, e. g., phenethyl bromide from
1-phenyl-1-bromoethane
    6.
    发明授权
    Separation of isomers, e. g., phenethyl bromide from 1-phenyl-1-bromoethane 失效
    异构体的分离,E.G.,1-苯基-1-甲氧基苯乙烯的苯乙酰胺

    公开(公告)号:US5181992A

    公开(公告)日:1993-01-26

    申请号:US537926

    申请日:1990-06-13

    CPC分类号: C07C17/395 Y10S203/06

    摘要: Mixtures of isomers, e.g., mixtures of phenethyl bromide and 1-phenyl-1-bromoethane, are separated by (a) selectively condensing one such isomer with an aromatic compound bearing at least one aryl (nuclear) hydrogen atom, e.g., xylene, in the presence of a catalytically effective amount of a Friedel-Crafts catalyst, e.g., ferric chloride, and then (b) separating the product of condensation, e.g., phenylxylylethane, from the unreacted isomer.

    摘要翻译: 异构体的混合物,例如苯乙基溴和1-苯基-1-溴乙烷的混合物通过(a)选择性地将一种这样的异构体与带有至少一个芳基(核)氢原子的芳族化合物(例如二甲苯) 存在催化有效量的Friedel-Crafts催化剂,例如氯化铁,然后(b)从未反应的异构体中分离缩合产物,例如苯基二甲基乙烷。

    Dielectric composition having an improved gas absorption
    7.
    发明授权
    Dielectric composition having an improved gas absorption 有权
    介电组合物具有改善的气体吸收

    公开(公告)号:US06391228B1

    公开(公告)日:2002-05-21

    申请号:US09588647

    申请日:2000-06-07

    IPC分类号: C07C116

    CPC分类号: H01B3/22

    摘要: The invention relates to a dielectric composition having improved gas absorption for electrical devices which comprises from 99% to 70% by weight of a mineral oil and from 1% to 30% by weight of at least one polyarylalkane composition.

    摘要翻译: 本发明涉及具有改善的电气装置的气体吸收的电介质组合物,其包含99%至70%重量的矿物油和1%至30%重量的至少一种聚芳基烷烃组合物。

    Heat transfer fluids comprising mono- and bis(methylbenzyl)xylene isomers
    9.
    发明授权
    Heat transfer fluids comprising mono- and bis(methylbenzyl)xylene isomers 失效
    包含单和双(甲基苄基)二甲苯异构体的传热流体

    公开(公告)号:US5593613A

    公开(公告)日:1997-01-14

    申请号:US283183

    申请日:1994-08-03

    IPC分类号: C09K5/08 C09K5/00

    CPC分类号: C09K5/08

    摘要: Unique heat transfer fluid media include (methylbenzyl)xylene or a composition comprising admixture of the compounds (A): ##STR1## in which n.sub.1 +n.sub.2 =0 or 1, wherein a fraction of such compounds (A) n.sub.1 +n.sub.2 =0 and further wherein another fraction of such compounds (A) n.sub.1 +n.sub.2 =1; the tricyclic compounds (A) may be replaced, in whole or in part, by a tricyclic compound (B): ##STR2##

    摘要翻译: 独特的传热流体介质包括(甲基苄基)二甲苯或包含化合物(A):其中n1 + n2 = 0或1的化合物(A)的混合物的组合物,其中一部分这样的化合物(A)n1 + n2 = 0,进一步其中这种化合物(A)n1 + n2 = 1的另一部分; 全部或部分地由三环化合物(B)代替三环化合物(A):(B)