Sulfo cation-exchange resins as heterogeneous catalysts for the reaction of styrene with formaldehyde

Autor: Kasymova, K. A., Sharf, V. Z., Litvin, E. F., Grigor'eva, E. N.
Zdroj: Russian Chemical Bulletin; January 1987, Vol. 36 Issue: 1 p201-203, 3p
Abstrakt: 1.Macroporous and gel sulfo cation-exchange resins are active catalysts for the condensation of styrene with formaldehyde. The product, 4-phenyl-1,3-dioxane was obtained in up to 97% yield.2.The activity of macroporous sulfo cation-exchange resins increases with decreasing particle diameter but in the case of the gel samples, granule size has only a slight effect on the reaction rate.3.The enhanced activity of sulfo cation-exchange resins is presumably a result of the high value of the acidity function Ho of the sulfonic acid groups of the cation-exchange resin.
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