Active carbon supported H 3PW 12 O 40 (PW 12 )solid acid catalysts are prepared and used in the etherification of light FCC gasoline with methanol.The effects of preparation conditions and the PW 12 loading on the act...Active carbon supported H 3PW 12 O 40 (PW 12 )solid acid catalysts are prepared and used in the etherification of light FCC gasoline with methanol.The effects of preparation conditions and the PW 12 loading on the activities of PW 12 (40)/C catalysts are studied.The results showed that the reflux time and the activating temperature influence the activity of the catalyst.As the loading of PW 12 on active carbon is lower, the reaction of PW 12 with the hydroxyl on the surface of active carbon makes the activity of the catalyst decrease.With the increase of loading of PW 12 on active carbon, the activities of the catalysts increase.Using PW 12 (40)/C as catalyst,under the conditions of reaction temperature 75?℃,pressure 0.8?MPa,molar ratio of methanol with tertiary carbonic olefins 1.0,and hourly space velocity 1.0 h -1 ,the ethers content in etherified light gasoline is up to 13.86%.展开更多
A nanosolid heteropoly acid of H 3PW 12 O 40 /SiO 2 was prepared with the sol-gel method and used to catalyze sythesis of methyl 5-amino-1,2,4,-trazolylformate sulfate.The structure of the nanosolid heteropoly acid H ...A nanosolid heteropoly acid of H 3PW 12 O 40 /SiO 2 was prepared with the sol-gel method and used to catalyze sythesis of methyl 5-amino-1,2,4,-trazolylformate sulfate.The structure of the nanosolid heteropoly acid H 3PW 12 O 40 /SiO 2 was characterized by IR,XRD and TEM.The following optimum condition were that the mole ratio of alcohol to carboxylic acid is 27∶1,the temperature is 75℃,the reaction time is 5 hours,and the catalyst is 2 5% of feedstock.Under the optimum conditions,the yield of esters was above 94%.展开更多
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
文摘Active carbon supported H 3PW 12 O 40 (PW 12 )solid acid catalysts are prepared and used in the etherification of light FCC gasoline with methanol.The effects of preparation conditions and the PW 12 loading on the activities of PW 12 (40)/C catalysts are studied.The results showed that the reflux time and the activating temperature influence the activity of the catalyst.As the loading of PW 12 on active carbon is lower, the reaction of PW 12 with the hydroxyl on the surface of active carbon makes the activity of the catalyst decrease.With the increase of loading of PW 12 on active carbon, the activities of the catalysts increase.Using PW 12 (40)/C as catalyst,under the conditions of reaction temperature 75?℃,pressure 0.8?MPa,molar ratio of methanol with tertiary carbonic olefins 1.0,and hourly space velocity 1.0 h -1 ,the ethers content in etherified light gasoline is up to 13.86%.
文摘A nanosolid heteropoly acid of H 3PW 12 O 40 /SiO 2 was prepared with the sol-gel method and used to catalyze sythesis of methyl 5-amino-1,2,4,-trazolylformate sulfate.The structure of the nanosolid heteropoly acid H 3PW 12 O 40 /SiO 2 was characterized by IR,XRD and TEM.The following optimum condition were that the mole ratio of alcohol to carboxylic acid is 27∶1,the temperature is 75℃,the reaction time is 5 hours,and the catalyst is 2 5% of feedstock.Under the optimum conditions,the yield of esters was above 94%.
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%。
