1,2-丙二醇氧化酯化制备高附加值C3化学品  

Oxidative esterification of 1,2-propanediol to high-value-added C3 chemicals

作　　者：魏涛 谢小虎 成肖玮 范荧荧 郭清霞 田俊英 WEI Tao;XIE Xiaohu;CHENG Xiaowei;FAN Yingying;GUO Qingxia;TIAN Junying(College of Petrochemical Engineering,Lanzhou University of Technology,Lanzhou 730050,China;Key Laboratory of Low Carbon Energy and Chemical Engineering of Gansu Province,Lanzhou 730050,China)

机构地区：[1]兰州理工大学石油化工学院,甘肃兰州730050 [2]甘肃省低碳能源化工重点实验室,甘肃兰州730050

出　　处：《化工科技》2024年第1期42-49,共8页Science & Technology in Chemical Industry

基　　金：甘肃省中央引导地方科技发展基金项目(22ZY1QA008)。

摘　　要：以拟薄水铝石为原料,通过高温焙烧制备γ-Al_(2)O_(3),并以γ-Al_(2)O_(3)为载体,通过吸附还原法制备了3Au/γ-Al_(2)O_(3)催化剂[其中3为m(Au)∶m(催化剂)=3%]。通过TEM、XRD、ICP-OES和BET对催化剂的形貌和结构进行了表征,考察了3Au/γ-Al_(2)O_(3)催化剂在1,2-丙二醇氧化酯化制备高附加值C3化学品的催化性能。结果表明,Au颗粒的高效分散有助于提高催化剂的性能;在优选条件下,以甲醇为溶剂,无碱助剂的体系中1,2-丙二醇的转化率为63.0%,C3化学品总选择性为63.6%;并且发现增加催化剂中Au负载量,可能会影响反应的发生,从而降低主产物的选择性。Using pseudo-boehmite as raw material,γ-Al_(2)O_(3) catalyst was prepared by high-temperature calcination.Then 3Au/γ-Al_(2)O_(3) catalyst was prepared by adsorption reduction method usingγ-Al_(2)O_(3) as carrier(where 3 is m(Au)∶m(catalyst)=3%).The morphology and structure of the catalyst were characterized by TEM,XRD,ICP-OES,and BET,and the catalytic performance of 3Au/γ-Al_(2)O_(3) catalyst in the oxidative esterification of 1,2-propanediol to high-value-added C3 chemicals was investigated.The results showed that the efficient dispersion of Au particles was helpful to improve the performance of the catalyst.Under the optimal conditions,the conversion of 1,2-propanediol reached 63.0%and the selectivity of C3 chemicals reached 63.6%in a solvent system of methanol without alkaline additives.It was also found that increasing the Au loading in the catalyst may affect the occurrence of the reaction,thereby reducing the selectivity of the main product.

关 键 词：1 2-丙二醇 C3化学品 氧化酯化 3Au/γ-Al_(2)O_(3) 

分 类 号：O643.32[理学—物理化学]