Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Gold recovery process










Image Number 2 for United States Patent #4462879.

A simplified, safe, fast and economical method of refining gold and a versatile apparatus for practicing the method are disclosed. The process and the apparatus are ideally suited for reclaiming substantially pure gold from gold jewelry and gold alloy scrap. Gold alloy to be refined is inquarted with a non-ferrous metal or metal alloy and the resulting gold alloy is cast into slab anodes which are suspended in an electrolytic cell containing a nitric acid solution as the electrolyte. The cell includes a stainless steel container cathode to retain gold mud or slime precipitated from the slab anode during the electrolytic process. If platinum and/or palladium are present in the gold alloy to be refined, inquartation with silver is carried out, and these platinum metals are dissolved in the electrolyte solution. If iridium or any other platinum metals are present in the gold alloy to be refined, they will remain in the resulting gold mud and subsequent treatment with aqua regia is necessary.








 
 
  Recently Added Patents
Polymeric compositions including their uses and methods of production
Location estimation of wireless terminals through pattern matching of deduced signal strengths
Method and apparatus for reducing and controlling highway congestion to save on fuel costs
Polymers
High power fiber amplifier with stable output
Turbulence sensor and blade condition sensor system
Semiconductor device manufacturing method and device for same
  Randomly Featured Patents
Low voltage differential swing driver circuit
Nail manicuring implement
Fabric softening composition
Apparatus for cleaning printing press blanket cylinder and method for manufacturing the same
Back support bracket for butterfly chairs
Conductor pipe plug
A/D converter
Drill bits with enhanced hydraulic flow characteristics
Tension device for bicycle chain
Reconstructable geometry shadow mapping method