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    • 6. 发明申请
    • Process for Preparing Polymethylols
    • 制备多羟基睾酮的方法
    • US20110272270A1
    • 2011-11-10
    • US13144124
    • 2010-01-07
    • Stephan SchlitterMichael SteinigerStefan RittingerTilman SirchSteffen Maas
    • Stephan SchlitterMichael SteinigerStefan RittingerTilman SirchSteffen Maas
    • B01D3/36
    • C07C29/80C07C29/141C07C45/75C07C45/82C07C31/22C07C31/245C07C47/19
    • The present invention relates to a process for recovering components from a low boiler mixture which is obtained in the distillation of hydrogenation effluents from the preparation of polymethylols, by multistage distillation of the low boiler mixture comprising a tertiary amine, water, methanol, polymethylol of the formula (I) methylolalkanal of the formula (II) alcohol of the formula (III) and an alkanal with a methylene group in the α position to the carbonyl group, and in which each R is independently a further methylol group or an alkyl group having 1 to 22 carbon atoms or an aryl or aralkyl group having 6 to 22 carbon atoms, a first distillation stage involving separating the low boiler mixture into a higher-boiling, predominantly water-rich fraction and into a lower-boiling aqueous organic fraction comprising the tertiary amine, and the second distillation stage involving separating the aqueous organic fraction from the first distillation stage into a predominantly amine-containing fraction and a further amine-depleted fraction, wherein the tertiary amine is trimethylamine or triethylamine, and the bottom temperature in the second distillation stage is 110° C. and more.
    • 本发明涉及一种从低沸点混合物中回收组分的方法,该方法是从多羟甲基的制备中蒸馏氢化流出物获得的,通过多级蒸馏包含叔胺,水,甲醇,多羟甲基的低沸点混合物 式(I)式(II)醇的式(I)的羟甲基烷醛和式(III)的醇的亚烷基与在羰基的α位上具有亚甲基的链烷醛,其中每个R独立地是另外的羟甲基或具有 1至22个碳原子或具有6至22个碳原子的芳基或芳烷基,第一蒸馏阶段包括将低锅炉混合物分离成较高沸点,主要是富水部分和低沸点含水有机部分, 叔胺,第二蒸馏阶段将含水有机部分从第一蒸馏阶段分离成主要是胺 其中叔胺为三甲胺或三乙胺,第二蒸馏阶段的底部温度为110℃以上。