The invention provides a method of recovering a copper component or a manganese component from a cleaning agent containing copper oxide, a cleaning agent containing basic copper carbonate, a cleaning agent containing copper hydroxide, or a cleaning agent containing copper oxide and manganese oxide, ...
Leaching of lepidolite and recovery of lithium hydroxide from purified alkaline pressure leach liquor by phosphate precipitation and lime addition This study investigated the pressure leaching of lithium and other valuable metals from lepidolite using NaOH and Ca(OH)(2). The findings showed that NaOH ...
Ptacek. Sulfate reduction permeable reactive barriers to treat acidity, cadmium, copper, nickel, and zinc: Two case studies. In Handbook of Groundwater Remediation Using Permeable Reactive Barriers.Academic Press: New York, pp. 495-522 (2002)....
As a result of the leaching test, almost of all valuable metals in the cobalt crust were leached in the solution.By addition of the calcium carbonate in the leaching solution, iron was removed completely as iron hydroxide. In this time, the other valuable metals were not effected by the ...
As a result of the leaching test, almost of all valuable metals in the cobalt crust were leached in the solution.By addition of the calcium carbonate in the leaching solution, iron was removed completely as iron hydroxide. In this time, the other valuable metals were not effected by the ...
The composition contains a monofunctional, difunctional or trifunctional organic acid and a buffering amount of a quaternary amine, ammonium hydroxide, hydroxylamine, hydroxylamine salt, hydrazine or hydrazine salt base. A method in accordance with the invention for removal of chemical residues from a ...
The viscose process, using sodium hydroxide as solvent, leads to acritical environmental pollution problem, whereas the NMMO process [9] is very costly. Ionic liquid is a good solvent for cellulose. The dissolution and regeneration in films of luffa in 1-butyl-3-methylimidazolium chloride has ...