THERMOCATALYSIS METHOD FOR PREPARING GLYCOLIC ACID FROM WASTE PLASTICS BY ONE-POT, AND CATALYST
개요
출원인
CHINA UNIVERSITY OF PETROLEUM (EAST CHINA)
발명자
Hao YAN; Qinghai CHEN; Xiang FENG; Kai ZHAO; Yibin LIU; Xin ZHOU; De CHEN; Chaohe YANG
IPC 분류
CPC 분류
A method for preparing glycolic acid from waste polyester plastic comprises: (1) mixing waste polyester plastic, a hydrolyzing agent, a solvent, and a catalyst in a reactor, and then adding a gas containing oxygen for reaction; (2) filtering and washing a reaction product to obtain terephthalic acid and oxidation product, wherein the oxidation product comprises glycolic acid. The catalyst comprises a metal element Au and a second metal oxide, and the second metal oxide is one compound or more compounds selected from a group consisting of NiO, TiO, CeO, ZrO, and MgO. The catalyst can be used for depolymerizing and oxidizing waste polyester plastics in one pot to prepare glycolic acid.
원문 (중국어)
A method for preparing glycolic acid from waste polyester plastic comprises: (1) mixing waste polyester plastic, a hydrolyzing agent, a solvent, and a catalyst in a reactor, and then adding a gas containing oxygen for reaction; (2) filtering and washing a reaction product to obtain terephthalic acid and oxidation product, wherein the oxidation product comprises glycolic acid. The catalyst comprises a metal element Au and a second metal oxide, and the second metal oxide is one compound or more compounds selected from a group consisting of NiO, TiO, CeO, ZrO, and MgO. The catalyst can be used for depolymerizing and oxidizing waste polyester plastics in one pot to prepare glycolic acid.