摘要 |
<p>The present invention relates to a method for preparing 5-hydroxy-1,3-dioxane (alpha, alpha'-isomer of glycerol formal) which is very suitable as a raw material for branched glycerol, and more particularly, to a method for preparing 5-hydroxy-1,3-dioxane, comprising the steps of: using, as a starting material, a mixture of 5-hydroxy-1,3-dioxane and 4-hydroxymethyl-1,3-dioxolane, preferably adding glycerol, and then heating the mixture at 40-100°C in the presence of a concentrated sulfuric acid as an acid catalyst to obtain a mixture in which the proportion of 5-hydroxy-1,3-dioxane is higher than that in the starting material; and allowing pivaloyl chloride and trityl chloride to react with the mixture having the increased proportion of 5-hydroxy-1,3-dioxane, thereby performing separation and purification of unreacted 5-hydroxy-1,3-dioxane through distillation or extraction.</p> |
申请人 |
KOREA TECHNO AGENCY CO., LTD.;THE UNIVERSITY OF TOKUSHIMA;NEMOTO, HISAO;HATTORI, HATSUHIKO |
发明人 |
NEMOTO, HISAO;HATTORI, HATSUHIKO |