Sodium hydroxide (NaOH) and oxalic acid (OA) were selected as the alkaline and acid additives, respectively, to investigate whether acid and alkaline additives could promote oxidative desulfurization in the UVH 2 O 2 system. The coal samples were investigated via scanning electron microscopy (SEM)...
If 32.6 mL of 0.240 M oxalic acid are required to titrate 48.9 mL of unknown sodium hydroxide: How many moles of acid are used in the titration? How do you find the molarity (M) of NaOH in this reaction with ...
waste disposalPre-processing includes chemical reaction with limestone or calcium oxide to generate calcium oxalate. It can be then subject to calcination and can put into particle collection device to collect for reuse. DescriptionOxalic acid is a colorless, odorless powder orgranular solid. The anhy...
Precious metal catalysts exhibit significantly high selectivity for the production of glycolic acid (4-electron oxidation) at potentials of both 0.4 and 1.2 V (vs. RHE), and it is worth noting that the electro- oxidation of EG to oxalic acid (8-electron oxidation) proceeds selec- tively ...
reported to achieve Li leaching efficiencies of 80–99 % at around 600–700 °C after separating the collector foils, using solid/liquid ratio (s/L) of 20–50 g/L, temperatures between 70 and 80 °C, reaction time of 30–120 min and oxalic acid concentrations of 0.25–1 M [20,21,...
sodium sulfide and hydrochloric acid was then introduced into the reaction solution. Hydrogen sulfide: Cyanogen = 3:1 was controlled, stirred evenly, then cooled thoroughly, allowed to stand, and filtered. The obtained crystals were washed with cold water, and recrystallized from ethanol to obtain ...
8.02 g (38 mmol) of sodium 2-ethylsulfanilate are added at 100° C. to a melt of 9.48 g (40 mmol) of 2-ethoxyoxalic acid anilidemonoethyl ester and 5.44 of imidazole. The reaction mixture is heated for 1/2 hour to 110° C., then for 2 hours to 130° C. After cooling, the...
PURPOSE:To prepare the titled compound useful as a raw material of oxalic acid, dye intermediate, pharmaceuticals, etc., in high yield and selectivity, by the vapor-phase catalytic reaction of carbon monoxide with a nitrous acid ester in the presence of a platinum-group metal catalyst supported...
In this study, highly-efficient hydrolysis of bagasse into xylose and arabinose sugars (C5 sugars) was developed by microwave-assisted oxalic acid pretreatment under mild reaction conditions. The effects of acid and hydrolysis conditions on the C5 sugar yields were discussed. The results showed that...
a reaction time of more than 2 h and an oxalic acid dosage of 30 to 40 g/L optimized the REEs recovery of at ~95% to nearly 100% for individual REE species. The test results validated the optimal pH predicted by the solution chemistry calculations (1.5 to 5); however, the predicted ...