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ACID LEACHING

R E Lueders, T C Frankiewicz

1980enhydrometallurgycopper extractionleachingsulfide oreelectrolysis

Abstract

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This document is a compiled listing of patents related to acid leaching processes for mineral extraction and metallurgical refining, primarily from 1974–1981 across several jurisdictions (US, Canadian, British, and French priority filings). It summarizes hydrometallurgical methods for selectively leaching and recovering metals such as copper, nickel, cobalt, zinc, lead, silver, gold, antimony, and especially alumina from various sulfide and oxide ores, kaolin, anorthosite, and other low‑grade aluminosilicates. The entries briefly describe reagents and process conditions including nitric, hydrochloric, sulfuric, and hydrofluoric acids; complexing agents such as acetonitrile; and regeneration or recycling of gases (NOx, SO₂, HCl, HF). Many of the processes emphasize selectivity (e.g., dissolving copper while leaving iron largely insoluble, or extracting nickel and cobalt from limonitic laterites) and closed-loop reagent recovery to improve efficiency and reduce waste. The document functions as a technical survey of contemporary patent developments in acid leaching for mineral exploration, mining, and processing.

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  title={ACID LEACHING},
  author={R E Lueders and T C Frankiewicz},
  year={1980},
  language={en}
}
TY  - JOUR
TI  - ACID LEACHING
AU  - R E Lueders
AU  - T C Frankiewicz
PY  - 1980
LA  - en
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