The composite solid superacid SO2-4/TiO2-Fe2O3(nTi∶nFe=2∶1)was prepared by the method of deveiopmental sol-gel and wet impregnation.First reported the composite solid superacid catalysis sy...The composite solid superacid SO2-4/TiO2-Fe2O3(nTi∶nFe=2∶1)was prepared by the method of deveiopmental sol-gel and wet impregnation.First reported the composite solid superacid catalysis synthesized isobutyl butyrate for buthlacid and isobutyl alcohol.It was researched that the acid-alcohol rate,time,quantity and repeatly applicatiom of catalyzes had imflune upon yield of esterication reaction.The influent actors of reaction were investigated.The results showed that teh appropriate conditions should be:weight of cstalyst was 10g;molar ratio of isobutyl alcohol to buthlacid was 18∶1;reaction time was 30h;the taking water reagent (Benzene) was 15ml.The yield of isobutyl butyrate was about 985%.The acid value was:1602<Ho<1452.展开更多
The synthesis of allantoin from carbamide and ethyl aldehydic acid with rareearth solid superacid SO2-4/TiO2La3+as catalyst was studied.It was found that the optimal experimental conditions were th...The synthesis of allantoin from carbamide and ethyl aldehydic acid with rareearth solid superacid SO2-4/TiO2La3+as catalyst was studied.It was found that the optimal experimental conditions were that La3+/TiO2 was immersed for 12h and backed at 550℃ for 3h;the yield of the allantoin could reach up to 745% under molar ratio of carbamide and ethyl aldehydic acid 35∶1,amount of SO2-4/TiO2La3+ solid superacid catalyst of 10g(if the weight of ethyl aldehydic acid was 01mol),the reaction temperature of 73℃～75℃ and reactiom time of 3h.展开更多
By using AgNO 3 (NH 4) 2S 2O 8 as irritant agent,2,3 dimethylpyrazine was reacted with carboxylic acid to yield six novel 2,3 dimethyl 5,6 dialkylpyrazine.The structure of these compounds was idetified by elementary a...By using AgNO 3 (NH 4) 2S 2O 8 as irritant agent,2,3 dimethylpyrazine was reacted with carboxylic acid to yield six novel 2,3 dimethyl 5,6 dialkylpyrazine.The structure of these compounds was idetified by elementary analysis,IR, 1HNMR.The conditions of the reation were preliminarily studied.展开更多
文摘The composite solid superacid SO2-4/TiO2-Fe2O3(nTi∶nFe=2∶1)was prepared by the method of deveiopmental sol-gel and wet impregnation.First reported the composite solid superacid catalysis synthesized isobutyl butyrate for buthlacid and isobutyl alcohol.It was researched that the acid-alcohol rate,time,quantity and repeatly applicatiom of catalyzes had imflune upon yield of esterication reaction.The influent actors of reaction were investigated.The results showed that teh appropriate conditions should be:weight of cstalyst was 10g;molar ratio of isobutyl alcohol to buthlacid was 18∶1;reaction time was 30h;the taking water reagent (Benzene) was 15ml.The yield of isobutyl butyrate was about 985%.The acid value was:1602<Ho<1452.
文摘The synthesis of allantoin from carbamide and ethyl aldehydic acid with rareearth solid superacid SO2-4/TiO2La3+as catalyst was studied.It was found that the optimal experimental conditions were that La3+/TiO2 was immersed for 12h and backed at 550℃ for 3h;the yield of the allantoin could reach up to 745% under molar ratio of carbamide and ethyl aldehydic acid 35∶1,amount of SO2-4/TiO2La3+ solid superacid catalyst of 10g(if the weight of ethyl aldehydic acid was 01mol),the reaction temperature of 73℃～75℃ and reactiom time of 3h.
文摘By using AgNO 3 (NH 4) 2S 2O 8 as irritant agent,2,3 dimethylpyrazine was reacted with carboxylic acid to yield six novel 2,3 dimethyl 5,6 dialkylpyrazine.The structure of these compounds was idetified by elementary analysis,IR, 1HNMR.The conditions of the reation were preliminarily studied.
