通常由等当量的甘醇和二元羧酸制备，它们经过聚合作用而生成聚酯和水。
They are usually prepared from equivalent amounts of glycols and dibasic carboxylic acids, which undergo condensation polymerization to produce the polyester and water.
以硫代二甘醇和硬脂酸为原料，选用对甲苯磺酸为催化剂，二甲苯为带水剂，合成了新型抗氧剂硫代二甘醇二硬脂酸酯。
A new antioxidant dithiodinglycol distearictate was synthesized starting from thiodiglycol and stearic acid using p-toluenesulfonic acid as catalyst and xylene as water carrier.
利用二甘醇为原料，一水硫酸氢钠为催化剂合成了1，4 二氧六环。
The synthesis of 1,4dioxane employing the diethylene glycol as raw material and sodium bisulfate monohydrate as catalyst was discussed.
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