A new method to prepare silica supported heteropolyanion catalysts formation on the silica surface of calcium and magnesium salts of phosphomolybdic acid, H3PMo12O40

Hydroamination of Terminal Alkynes by Amines Catalyzed by Copper Heteropoly Salts: A Simple Approach Towards Imine Synthesis

“…The use of heteropoly compounds as homogenous catalysts has its own drawbacks including recovery and recyclability issues and hence lot of effort has been made to heterogenise HPAs [21][22][23][24][25][26][27]. Most of the heteropoly salts are insoluble in non-polar solvents such as benzene, toluene and hydrocarbons and these are known to act as catalysts even in insoluble reaction medium [28][29][30][31][32][33].…”

Hydroamination of Terminal Alkynes by Amines Catalyzed by Copper Heteropoly Salts: A Simple Approach Towards Imine Synthesis

“…The use of heteropoly compounds as homogenous catalysts has its own drawbacks including recovery and recyclability issues and hence lot of effort has been made to heterogenise HPAs [21][22][23][24][25][26][27]. Most of the heteropoly salts are insoluble in non-polar solvents such as benzene, toluene and hydrocarbons and these are known to act as catalysts even in insoluble reaction medium [28][29][30][31][32][33].…”

Calcium Salts of Tungstophoric Acid Supported on Silica as Novel Catalysts for Tetrahydrofuran Polymerization

“…The calcium salts of heteropolyacid catalysts were prepared via two step impregnation according to reference [29]. In a typical synthesis, 4.8 g silica support (Shanghai Chemical Reagent Company) was impregnated with a 20 mL solution containing 0.097 g Ca(NO 3 …”