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    • 1. 发明授权
    • Method of recovering ethylene oxide
    • 回收环氧乙烷的方法
    • US4028070A
    • 1977-06-07
    • US638841
    • 1975-12-08
    • Jiro UchiiMasatsugu KodoTsunehiko SogaYutaka Morimoto
    • Jiro UchiiMasatsugu KodoTsunehiko SogaYutaka Morimoto
    • B01D19/00B01D19/04
    • B01D19/0005B01D19/0409
    • A method of recovering ethylene oxide from the reaction product gas that is obtained by the catalytic vapor phase oxidation of ethylene with molecular oxygen over a silver-containing catalyst, which comprises conducting the reaction product gas to an absorption column maintained at a pressure in the range of 2 - 40 kg/cm.sup.2, countercurrently contacting reaction product gas with an aqueous absorbent in the absorption column to dissolve ethylene oxide in the aqueous absorbent to form an aqueous ethylene oxide solution, conducting the thus formed aqueous solution to a stripping column, stripping and recovering ethylene oxide from aqueous ethylene oxide solution at the stripping column, and thereafter recycling the remaining aqueous solution which is obtained after stripping ethylene oxide to the absorption column to be again used as the aqueous absorbent; characterized by using as the aqueous absorbent one containing ethylene glycol in the range of 0.1 - 40% by weight and a defoaming agent in the range of 0.5 - 1000 ppm and having a pH in the range of 3 - 12.
    • 从通过在含银催化剂上分子氧的乙烯的催化气相氧化获得的反应产物气体中回收环氧乙烷的方法,其包括将反应产物气体导入保持在该范围内的压力的吸收塔 2-40kg / cm 2,将反应产物气体与吸收塔中的含水吸收剂逆流接触以溶解含水吸收剂中的环氧乙烷以形成环氧乙烷水溶液,将由此形成的水溶液导入汽提塔,汽提和 在汽提塔处从环氧乙烷水溶液中回收环氧乙烷,然后将汽提环氧乙烷后得到的剩余水溶液再循环到吸收塔,再次用作水性吸收剂; 其特征在于使用含有0.1-40重量%的乙二醇和0.5-1000ppm范围内的消泡剂并且pH在3-12范围内的含水吸收剂。
    • 4. 发明授权
    • Method for production of aqueous dispersion of N-substituted
N',N'-alkylene urea
    • 制备N-取代的N',N'-亚烷基脲的水分散体的方法
    • US4696760A
    • 1987-09-29
    • US678247
    • 1984-12-05
    • Yutaka MorimotoMinoru SaotomeAtsushi Komai
    • Yutaka MorimotoMinoru SaotomeAtsushi Komai
    • C07D203/20D06M13/487C09K3/00B01J13/00C07D203/12
    • D06M13/487C07D203/20
    • A method for the production of an aqueous dispersion of a water insoluble N-substituted N',N'-alkylene urea having the general formula I: ##STR1## wherein R.sup.1 denotes alkyl having 6 to 20 carbon atoms, phenyl or ##STR2## in case of m=1, or R.sup.1 denotes alkylene having 6 to 20 carbon atoms, phenylene or ##STR3## in case of m=2, where X denotes H, CH.sub.3 or OCH.sub.3 and n is 0 or 1, R.sup.2 denotes H or CH.sub.3, R.sup.3 denotes H, CH.sub.3 or C.sub.2 H.sub.5 and R.sup.4 denotes H or CH.sub.3, by the reaction of an alkylene imine having 2 to 4 carbon atoms with an isocyanate represented by the general formula II:R-NCO (II)wherein R denotes an alkyl having 6 to 20 carbon atoms, ##STR4## wherein X and n are the same as above in the presence of at least one surface active agent selected from the group consisting of anionic surface active agents and nonionic surface active agents under vigorous stirring.
    • 制备具有通式I的水不溶性N-取代N',N'-亚烷基脲的水分散体的方法:其中R1表示具有6至20个碳原子的烷基,苯基或 在m = 1的情况下,或R 1表示具有6〜20个碳原子的亚烷基,在m = 2的情况下为亚苯基或者IMA图,其中X表示H,CH 3或OCH 3,n为0或1,R 2表示H 或CH3,R3表示H,CH3或C2H5,R4表示H或CH3,通过具有2至4个碳原子的亚烷基亚胺与由通式II表示的异氰酸酯反应:R-NCO(II)其中R表示 在有剧烈搅拌下,在至少一种选自阴离子表面活性剂和非离子表面活性剂的表面活性剂的存在下,X和n与上述相同。