Search Results
HPA 12-tungstosilicoheteropolyacid (H 4 SiW 12 O 40 ) The hydrolysis of DME, the limiting step in the overall SRDME process, is equilibrium controlled and limited by a low equilibrium constant (with
samples depends on the type of tungsten precursor (WCl 6 > (NH 4 ) 6 H 2 W 12 O 40 > H 2 WO 4 ) [ 18 ]. Here we present the photocatalytic degradation of Malachite Green (MG) with composite thin films TiO 2 /WO 3 . Since 1933 [ 19 ], the MG dye
to the prior pozzolanic activity mediated by the 8.0% and 11.50% Al 2 O 3 r− content, respectively, in these blends. Indeed, the activity attributed to the respective proportions of SiO 2 r− (%) [ 5 ] in the three pozzolans, i.e., O , 40.7%; A , 37
. Synthesis, physical-chemical and catalytic properties of mixed compositions Ag/H 3 PMo 12 O 40 /SiO 2 J Therm Anal Calorim. 2011 . doi: 10.1007/s10973-011-1430-z . 28. Tarafdar , A , Panda
.67 Yb 2 oba 3 ·6H 2 O 40–85 2H 2 O 2.94 2.57 170 137 170–460 600 67
. Oxalate precursor Ca 3 [Bi 6 O 6 (C 2 O 4 ) 4 (OH) 3 NO 3 ]0.5H 2 O 40–200 0.5 0.46 H 2 O Endoth./50 °C Ca 3 Bi 6 O
(7.2 g, 28 mmol) in Et 2 O (40 mL) was added dropwise n -BuLi (12 mL, 30 mmol, 2.5 M solution in hexane) at 298–300 K. The reaction mixture was stirred for another 1.5 h at room temperature. The mixture was then heated to reflux, followed by dropwise
], methyltrioxorhenium [ 36 ], V, Bi doped heteropolyacids (H 3 PMo 12 O 40 ) [ 37 ] for the oxidation of sulfides to sulfoxides or sulfones, depending on the conditions. However, the problem with the use of transition metal catalysts in oxidations with H 2 O 2 is
. Yori , JC , Grau , JM , Benítez , VM , Sepúlveda , J 2005 Hydroisomerization-cracking of n-octane on heteropolyacid H 3 PW 12 O 40 supported on ZrO 2 , SiO 2 and carbon: effect of Pt incorporation on catalyst performance . Appl Catal A Gen
regarding the imp. H as its closest eluting impurity. The resolution between the RIV and imp. H ( Rs RIV/imp. H), using mobile phase of EtOH :H 2 O (40:60%, v/v ) was lower than 1.5. Therefore, the percentage of EtOH was decreased to 35% ( v/v ), which
