Preparation of mono- and poly-ethylene glycol dialkyl ethers
    1.
    发明授权
    Preparation of mono- and poly-ethylene glycol dialkyl ethers 失效
    单和聚乙二醇二烷基醚的制备

    公开(公告)号:US4187384A

    公开(公告)日:1980-02-05

    申请号:US2336

    申请日:1979-01-10

    CPC分类号: C07C41/06 C08G65/337

    摘要: Mono- and poly-ethylene glycol dialkyl ethers IR.sup.1 --O--(--CH.sub.2 --CH.sub.2 --O--).sub.n --R.sup.2where R.sup.1 is C.sub.1 -C.sub.4 -alkyl, R.sup.2 is C.sub.3 -C.sub.5 -alkyl and n is from 1 to 100, are prepared by reacting monoalkyl ethers IIR.sup.1 --O--(--CH.sub.2 --CH.sub.2 --O--).sub.n --Hwith a C.sub.3 -C.sub.5 -olefin III in the presence of an acid ion exchanger at from 1 to 200 bar and from 40.degree. to 150.degree. C., the reaction being started at from 100.degree. to 150.degree. C. and the temperature then being lowered, in at least two approximately equal steps, to from 40.degree. to 80.degree. C., the temperature being dropped in each case to the next-lower level when the conversion per unit time no longer changes significantly.

    摘要翻译: 单 - 和聚乙二醇二烷基醚I R1-O - ( - CH2-CH2-O-)n-R2其中R1是C1-C4烷基,R2是C3-C5-烷基,n是1到100, 在酸性离子交换剂存在下,在1至200巴和40至150℃下使单烷基醚IIR 1 -O - ( - CH 2 -CH 2 -O-)n H与C 3 -C 5烯烃III反应制备。 反应开始于100℃至150℃,然后将温度以至少两个近似相等的步骤降低至40℃至80℃,每种情况下将温度降至 下一级别,单位时间的转换不再显着变化。

    Manufacture of organic isocyanates
    3.
    发明授权
    Manufacture of organic isocyanates 失效
    有机异氰酸酯的制造

    公开(公告)号:US3960916A

    公开(公告)日:1976-06-01

    申请号:US543693

    申请日:1975-01-24

    IPC分类号: C07C263/10 C07C118/02

    CPC分类号: C07C263/10

    摘要: Organic isocyanates are manufactured, in the absence of organic solvents, by reaction of primary organic amines with hydrogen chloride, to give amine hydrochlorides, subsequent phosgenation, and thermal decomposition of the carbamyl chlorides formed as intermediates.

    摘要翻译: 有机异氰酸酯在不存在有机溶剂的情况下通过主要有机胺与氯化氢的反应来制备,得到胺盐酸盐,随后的光气化和作为中间体形成的氨基甲酰氯的热分解。