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    • 7. 发明申请
    • PROCESS FOR PREPARING ALKANEDIOL AND DIALKYL CARBONATE
    • 制备阿尔卡尼和碳酸二氢钾的方法
    • WO2010063780A1
    • 2010-06-10
    • PCT/EP2009/066281
    • 2009-12-03
    • SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.ALLAIS, Cyrille, PaulVAPORCIYAN, Garo, Garbis
    • ALLAIS, Cyrille, PaulVAPORCIYAN, Garo, Garbis
    • C07C68/06
    • C07C68/065C07C69/96
    • The invention relates to a process for the preparation of a dialkyl carbonate and an alkanediol comprising: (a) reacting an alkylene carbonate and an alkanol in the presence of a homogeneous transesterification catalyst to obtain a mixture containing unconverted alkylene carbonate, unconverted alkanol, dialkyl carbonate, alkanediol and catalyst, wherein the catalyst amount is of from 20 to 2,000 ppmw based on the amount of the mixture; (b) contacting the mixture from step (a) with a solid sorbent to obtain a mixture containing unconverted alkylene carbonate, unconverted alkanol, dialkyl carbonate and alkanediol and further containing either no catalyst or a substantially reduced amount of catalyst; (c) separating the mixture from step (b) into a bottom stream containing unconverted alkylene carbonate and alkanediol and a top stream containing unconverted alkanol and dialkyl carbonate; (d) recovering the alkanediol from the bottom stream from step (c); and (e) recovering the dialkyl carbonate from the top stream from step (c).
    • 本发明涉及一种制备碳酸二烷基酯和链烷二醇的方法,包括:(a)在均相酯交换催化剂存在下使碳酸亚烷基酯和链烷醇反应,得到含有未转化的碳酸亚烃酯,未转化的链烷醇,碳酸二烷基酯 ,链烷二醇和催化剂,其中催化剂量基于混合物的量为20至2,000ppmw; (b)将来自步骤(a)的混合物与固体吸附剂接触以获得含有未转化的碳酸亚烃酯,未转化的链烷醇,碳酸二烷基酯和链烷二醇的混合物,并且还不含催化剂或基本上减少量的催化剂; (c)将步骤(b)中的混合物分离成含有未转化的碳酸亚烷基酯和链烷二醇的底部料流和含有未转化的链烷醇和碳酸二烷基酯的顶部料流; (d)从步骤(c)的塔底物流回收链烷二醇; 和(e)从步骤(c)的顶部流中回收碳酸二烷基酯。