1,2-丙二醇选择性氧化制备丙酮醛催化剂研究  

Development of the catalysts for air selective oxidation of propylene glycol to methylglyoxal

作　　者：黄国东[1] 陈志荣[1] 尹红[1] 

机构地区：[1]浙江大学材料与化学工程学院,浙江杭州310027

出　　处：《工业催化》2005年第12期48-51,共4页Industrial Catalysis

摘　　要：采用银改性和银负载制备了两种1,2-丙二醇空气氧化合成丙酮醛催化剂,并对其性能进行了研究。在固定催化剂浓度及溶剂比条件下,对催化剂进行了评价。结果表明,催化剂最佳制备条件为:改性金属的盐酸溶液、一定粒度的银在50℃反应2 h,滴加甲醛溶液,Na2CO3溶液调节pH=10,升温还原2 h,溶液进行过滤,滤饼用蒸馏水洗涤至中性,在空气条件下110℃干燥,分级过筛。使用该催化剂在反应温度为410℃、1,2-丙二醇空速12 h-1、氧气与1,2-丙二醇物质的量比和水与1,2-丙二醇质量比分别为1.6和1的条件下,催化氧化转化率可达98.4%,催化剂选择性可达82.2%,催化剂寿命可达90天。Two types of catalysts for oxidation of 1,2-propylene glycol （PC-O） to methyglyoxal（MGX） with air were prepared, and their catalytic properties were tested. Catalyst prepared by the following procedure showed the best catalytic behavior： metal hydrochloric acid solution reacting with sliver for two hours, adding formaldehyde solution, keeping pH = 10 by sodium bicarbonate, reducing for two hours, filtering the solution, washing the filter cake with distilled water to pH= 7, drying at 110 ℃ in the air, and screening, propylene glycol conversion of 98.4%, selectivity to methyglyoxal of 82.2% and service life of 90 days were attained under the following conditions： 410 ℃, space velocity 12 h^-1, n（Ch）：n（PGO）=1.6：1,m（H2O）：m（PGO）=1：1.

关 键 词：1 2-丙二醇 1 1-二甲氧基丙酮 催化氧化 丙酮醛催化剂 

分 类 号：TQ426.94[化学工程] TQ223.162