University of Education
University of Education Patent applications | ||
Patent application number | Title | Published |
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20120266723 | Processing copper sulfide ores - Copper is chemically extracted from crude ores by first roasting it at temperature up to 500° C. for 90 minutes, then treating it with ammonium salt followed by leaching with sulfuric acid to obtain a soluble copper mass for further purification. | 10-25-2012 |