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    • 6. 发明公开
    • PROCESS FOR PRODUCTION OF DITRIMETHYLOLPROPANE
    • VERFAHREN ZUR HERSTELLUNG VON DITRIMETHYLOLPROPAN
    • EP2204356A1
    • 2010-07-07
    • EP08844216.5
    • 2008-10-17
    • Mitsubishi Gas Chemical Company, Inc.
    • WATANABE, Masafumi
    • C07C41/06C07C29/38C07C31/22C07C43/13C07B61/00
    • C07C29/38C07C29/80C07C41/01C07C43/132C07C31/22
    • The present invention provides a method for producing ditrimethylolpropane including reacting n-butyraldehyde with formaldehyde in the presence of a base catalyst to thereby produce trimethylolpropane and ditrimethylolpropane, wherein the method includes (I) a step of reacting n-butyraldehyde with formaldehyde (1) in the presence of a base catalyst (1), to thereby produce a reaction mixture containing trimethylolpropane, ditrimethylolpropane, and 2-ethyl-2-propenal; (II) a step of recovering 2-ethyl-2-propenal through distillation of the produced reaction mixture; and (III) a step of adding, to a distillation residue obtained through recovery of 2-ethyl-2-propenal, the recovered 2-ethyl-2-propenal and formaldehyde (2), and optionally a base catalyst (2), to thereby allow reaction for production of ditrimethylolpropane to proceed, wherein the amounts of formaldehyde (I) and the base catalyst (1) supplied in step I and formaldehyde (2) and the base catalyst (2) supplied in step II are controlled to specific amounts, to thereby effectively produce ditrimethylolpropane. According to the present invention, the yield of di-TMP is considerably increased, and the amount of bis-TMP by-produced can be considerably reduced with respect to the amount of di-TMP (i.e., a product of interest) produced; that is, di-TMP can be effectively produced in an industrially advantageous manner.
    • 本发明提供了一种二羟甲基丙烷的制备方法,包括在碱催化剂存在下使正丁醛与甲醛反应,从而制得三羟甲基丙烷和二羟甲基丙烷,其中所述方法包括(I)使正丁醛与甲醛(1)在 碱催化剂(1)的存在,从而产生含有三羟甲基丙烷,二三羟甲基丙烷和2-乙基-2-丙烯醛的反应混合物; (II)通过蒸馏生成的反应混合物回收2-乙基-2-丙烯醛的步骤; 和(III)将回收的2-乙基-2-丙烯醛和甲醛(2)和任选的碱催化剂(2)加入到通过回收2-乙基-2-丙烯醛获得的蒸馏残余物的步骤中, 从而允许进行二羟甲基丙烷的生产反应,其中将步骤I中供应的甲醛(I)和碱催化剂(1)和步骤II中提供的甲醛(2)和碱催化剂(2)的量控制在特定量 ,从而有效地产生二羟甲基丙烷。 根据本发明,di-TMP的产率显着增加,相应于所生产的di-TMP(即感兴趣的产品)的量,可以显着降低副产的双TMP的量; 也就是说,di-TMP可以以工业上有利的方式有效地产生。