采用浸渍法制备H3PW12O40/TiO2-SiO2催化剂,以环己酮和乙二醇为原料合成环己酮乙二醇缩酮。实验考察了环己酮与乙二醇物质的量比、催化剂用量、反应时间对收率的影响。结果表明,H3PW12O40/TiO2-SiO2催化剂是合成环己酮乙二醇缩酮的良好...采用浸渍法制备H3PW12O40/TiO2-SiO2催化剂,以环己酮和乙二醇为原料合成环己酮乙二醇缩酮。实验考察了环己酮与乙二醇物质的量比、催化剂用量、反应时间对收率的影响。结果表明,H3PW12O40/TiO2-SiO2催化剂是合成环己酮乙二醇缩酮的良好催化剂,确定了最佳合成条件:n(环己酮)∶n(乙二醇)=1∶1.4,催化剂用量为反应物料总质量的0.8%,反应时间45 min,带水剂环己烷用量为6 m L;此条件下环己酮乙二醇缩酮收率可达77.6%。展开更多
The attractive utilization route for one-step catalytic oxidation of dimethyl ether to dimethoxymethane was successfully carried out over the H3PW12O40（40%）/SiO2 catalyst, modified by Cs, K, Ni, and V. The Cs modifi...The attractive utilization route for one-step catalytic oxidation of dimethyl ether to dimethoxymethane was successfully carried out over the H3PW12O40（40%）/SiO2 catalyst, modified by Cs, K, Ni, and V. The Cs modification of H3PW12O40（40%）/SiO2 gave the most promising result of 20% dimethyl ether conversion and 34.8% dimethoxymethane selectivity. Dimethoxymethane could be synthe- sized via methoxy groups decomposed from dimethyl ether through the synergistic effect between the acid sites and the redox sites of Cs modified H3PW12O40（40%）/SiO2.展开更多
文摘采用浸渍法制备H3PW12O40/TiO2-SiO2催化剂,以环己酮和乙二醇为原料合成环己酮乙二醇缩酮。实验考察了环己酮与乙二醇物质的量比、催化剂用量、反应时间对收率的影响。结果表明,H3PW12O40/TiO2-SiO2催化剂是合成环己酮乙二醇缩酮的良好催化剂,确定了最佳合成条件:n(环己酮)∶n(乙二醇)=1∶1.4,催化剂用量为反应物料总质量的0.8%,反应时间45 min,带水剂环己烷用量为6 m L;此条件下环己酮乙二醇缩酮收率可达77.6%。
基金Foundation items:the National Natural Science Foundation of China(No.20373085)the Natural Science Foundation of Shanxi Province(No.20051023)
文摘The attractive utilization route for one-step catalytic oxidation of dimethyl ether to dimethoxymethane was successfully carried out over the H3PW12O40（40%）/SiO2 catalyst, modified by Cs, K, Ni, and V. The Cs modification of H3PW12O40（40%）/SiO2 gave the most promising result of 20% dimethyl ether conversion and 34.8% dimethoxymethane selectivity. Dimethoxymethane could be synthe- sized via methoxy groups decomposed from dimethyl ether through the synergistic effect between the acid sites and the redox sites of Cs modified H3PW12O40（40%）/SiO2.
