Patent Profile
| Patent No: | IN158990 [India] | Application No: | 667/DEL/1982 |
| Title: | Improvements in or relating to a process for the extraction of copper, lead and zinc metal values from complex sulphide ores/concentrates | ||
| Issue Date: | 07-03-1987 | File Date: | 01-09-1982 |
| Inventor(s): | Katragoda Sarveswara Rao; Shashi Anand; Karanam Srinivasa Rao; Sarat Chandra Das; Todenpu subbiah; Radhanath Prasad Das | ||
| IPC Classification: | C22B19/26, 15/10, 13/04 | ||
| Abstract: | A powdered Cu-Pb-Zn ore conc. is autoclave-leached 2-4 h with aqueous NH4OH and (NH4)2SO4at 85-120°and 2-7 kg O/m2. Pb-containing solids are separated from the leach containing Cu, Zn, and Cd, and then leached further with an aqueous solution (30-80°) containing excessive FeCl3to recover Pb chlorides. The initial leach liquor is treated for: (a) extraction of Cu with com. LIX 64N in an organic solvent (esp., kerosine), and (b) extraction of Zn with com. Hostarex DK-16 (C16H22O2). The extracted metals are stripped to obtain concs. for electrowinning. | ||
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