Search U.S. government technical reports digitized or harvested by TRAIL.
Solvent extraction of nickel and zinc from a waste phosphate solution
Recovery of phosphates and metals from waste phosphate sludge by reduction-sinter processes
Recovery of phosphates and metals from phosphate sludge by solvent extraction
Sulfuric acid extraction technique for recovering zinc and sulfur from sphalerite
Regeneration and recycling of waste chromic acid-sulfuric acid etchants