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    • 25. 发明授权
    • Method for the production of 1,3-propandiol
    • 1,3-丙二醇的生产方法
    • US5171898A
    • 1992-12-15
    • US798225
    • 1991-11-27
    • Dietrich ArntzNorbert Wiegand
    • Dietrich ArntzNorbert Wiegand
    • B01J31/08C07B61/00C07C29/04C07C29/14C07C29/141C07C31/20C07C45/64
    • C07C29/141C07C45/64
    • The hydration of acrolein in the presence of a chelate-forming ion exchange resin based on polystyrene/divinyl benzene as catalyst and on the subsequent hydrogenation of the reaction mixture freed of the non-reacted acrolein and containing 3-hydroxypropionaldehyde is disclosed. As a result of using chelate-forming ion exchangers with anchor groups of the formula ##STR1## in which Z=H, C.sub.1 -C.sub.6 -alkyl, --CH.sub.2 --CH(CH.sub.3)--Y' or --(CH.sub.2).sub.o --Y' and Y and/or Y'=--COOH, --OH, pyridyl or --P(O)(CH.sub.2 OH)OH, the hydration occurs at lower temperatures with a greater space-time yield and especially a greater selectivity than when using previously known ion exchangers. Resins with methylene imino diacetic acid anchor groups in the H form or partially doped with alkali-, alkaline-earth or earth-metal ions are especially suitable.
    • 公开了在基于聚苯乙烯/二乙烯基苯作为催化剂的螯合形成离子交换树脂存在下丙烯醛的水合,然后在无反应的丙烯醛和含有3-羟基丙醛的反应混合物的随后氢化中进行水合。 作为使用螯合形成离子交换剂,其结构式为“IMAGE”的锚定基团,其中Z = H,C 1 -C 6 - 烷基,-CH 2 -CH(CH 3)-Y'或 - (CH 2)o Y'和Y 和/或Y'= -COOH,-OH,吡啶基或-P(O)(CH 2 OH)OH时,水合在较低的温度下发生,具有比使用先前已知的离子交换剂更大的空时收率,特别是更大的选择性。 具有H形式的亚甲基亚氨基二乙酸锚定基团或部分掺杂有碱金属,碱土金属或土金属离子的树脂是特别合适的。