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: the sulfuric acid concentration, surfactant concentration and temperature. Among these three factors, the surfactant concentration is the most important contributor to leaching rate. After obtaining... for leaching were finally obtained as follows: the sulfuric acid concentration was 60 g/L, the surfactant concentration was 0.00914 mol/L, and the temperature was 45 °C. The leaching rate was 66.81......
Utilization of Platinum Metals, Kunming 650106, China) Abstract: By comparing with the processing technologies of superalloys between domestic and abroad, the atomized spray-sulfuric acid leaching nickel and cobalt technology was proposed considering the composition of waste superalloys. The leaching parts of the process was studied. The effects of sulfuric acid content, temperature leaching time......
) Abstract: The high pressure acid leaching of zinc powder replacement residue containing gallium and germanium was carried out. The effects of sulfuric acid concentration, liquid to solid ratio, time... investigated. The results show that increasing sulfuric acid concentration till 156 g/L benefits the leaching of gallium and germanium. Above this point, the leaching rate of germanium will decrease......
Effect of sulfuric acid concentration on vanadium leaching rate 2.2 浸出时间对钒浸出率的影响 将石煤矿粉和酸度为250 g/L的硫酸溶液按液固比为1.5 mL?1 g分别加入到加压釜和三口反应器,并不断通入氧气,维持加压釜内压力为1.2 MPa,控制加压釜内反应温度120 ℃和三口烧瓶内反应温度93 ℃(昆明当... Zhi-gan (Faculty of Materials and Metallurgical Engineering, Kunming University of Science and Technology,Kunming 650093, China) Abstract: The leaching rates of vanadium of oxidizing acid leaching......
The Optimized Synthesis of Starch-g-Lactic Acid Copolymer with High Grafting Degree Catalyzed by Sulfuric Acid胡志颖School of Materials Science and Engineering, Wuhan University of Technology摘 要:The starch-g-lactic acid copolymer was synthesized with catalysis of sulfuric acid by onestep process, and the structure of starch-g-lactic acid copolymer......
526020, China) Abstract: Using waste Mn-Zn magnetic core powders as the raw material, the leaching conditions of sulfuric acid were studied and the leaching kinetics mechanism was also analyzed... conditions are as follows: The content of sulfuric acid is 1.15 times of its theoretical content, reaction temperature is 95-100 ℃ and leaching time is 4.5 h. Under above optimal conditions, four times......
in a thermostatic water bath. The initial leaching solution of 20 g/L Fe3+ concentration and 20 g/L sulfuric acid concentration was prepared by adding analytically pure ferric sulfate and 98% sulfuric acid... h for the acid leaching process. Fig. 1 Effect of liquid-to-solid ratio on carbonate decomposition ratio (Conditions: 20 g/L Fe3+ concentration,20 g/L sulfuric acid concentration, 80 °C and 3 h......
leaching of ZNLR was investigated. The effects of hydrazine sulfate concentration, initial sulfuric acid concentration, temperature, duration and liquid-to-solid ratio on the extraction of Cd, Zn and Fe...; sulfuric acid concentration, 80 g/L; temperature, 95 °C; duration of leaching, 120 min; liquid-to-solid ratio, 10 mL/g and agitation, 400 r/min. XRD and SEM-EDS analyses of the leaching residue......
of sulfuric acid is 300 g/L and the residue is agitated for 3 h at leaching temperature of 80 °C, the leaching rate of selenium could reach 97.76 %. The experimental results conform the calculated results...] is the important basis for thermodynamics analysis of the process of leaching selenium residue. During selenium extraction from various materials, sulfuric acid solutions are commonly found in processes......
Extraction of germanium(IV) from acid leaching solution with mixtures of P204 and TBPMA Xi-hong(马喜红), QIN Wen-qing(覃文庆), WU Xue-lan(吴雪兰)(School of Resources Processing and Bioengineering, Central... the method as simple as possible. Germanium was recovered from sulfuric acid, using di-(2-ethylhexyl) phosphoric acid (P204) as an extractant, tributyl phosphate (TBP) as modifier diluted in sulfonate......
