Hydrolyzed filler as well as preparation method and application thereof

The invention relates to the technical field of hydroxyl fatty acid ester hydrolysis, and discloses a hydrolytic filler as well as a preparation method and application thereof. The hydrolytic filler comprises a silane layer and an active layer which are sequentially coated on the outer surface of the filler, the active layer comprises an amide group, a pyrrolyl group, a sulfydryl group and/or thioether, a phosphate group and a sulfonic acid group. When the hydrolytic filler is used for preparing a glycolic acid aqueous solution through glycolic acid ester hydrolysis, the water-ester ratio in the hydrolysis process and the oligomer content in a target product can be effectively reduced. 本发明涉及羟基脂肪酸酯水解的技术领域，公开了一种水解填料及其制备方法与应用。该水解填料包括依次包覆在填料外表面的硅烷层和活性层；所述活性层包括酰胺基、吡咯基以及巯基和/或硫醚、磷酸基和磺酸基。该水解填料用于羟基乙酸酯水解制备羟基乙酸水溶液时，能够有效降低水解过程中水酯比和目标产品中的低聚物含量。