Us Patent Leaching Gold For Austic Soda

Patented Aug.~ 13,. 1935 ' 2,010,870 UNITED STATES PATENT OFFICE ... ment of anode sludge or slime containing gold ... in the ordinary way with soda ...

US. PATENT DOCUMENTS ... process Wherein the leaching of the gold from ?nely ground ... and caustic solutions are heated to near the boiling point of

us patent leaching gold for caustic soda. Beijing Branch. D501/D505, Lifi Space, Sixinzhuang Street, Chaoyang District Beijing, China. Factory Address.

Filtration and separation ... [US Patent 515,895 Process ... and that the disposal area is sealed to prevent leaching of caustic soda into the ...

Tiosulphate Leaching. ... It then reviews the results of leaching various gold ores that have been reported in the ... VILLEGAS. D.359. I. S. TMS. 35. US Patent 5. C.

About Us. About; Contact Us; News; ... Fundamental aspects of gold leaching in thiosulfate... ... Fundamental aspects of gold leaching in thiosulfate solutions Li, ...

The sulfuric acid leaching of zinc plant residues was studied in ... Production of Zinc,” US Patent No ... by Fusion with Caustic Soda,” Mineral ...

75 Gold Recovery Methods ... (US #2,283,198). They discovered leaching gold in aqueous ... This text is based on the Kindig and Turner method presented in US patent ...

Leaching of Sb from TROF furnace doré ... such as borax and silica based minerals together with soda and traces of sealing ... P.W. Godbehere, US Patent, US4404022 A ...

(8) Note. Processes of preparation or treatment of inorganic compounds and nonmetallic elements which involve only physical treatment except for extracting, leaching or dissolving, per se, are classified in 23, Chemistry: Physical Processes, subclasses 293+ unless specifically provided for in some other main class.

Process for the reduction of the sodium hydroxide losses of the Bayer-type alumina production Number ... United States of America Patent. PATENT NO:

US Patent Class 423 ... Electronic Patent Documents: Paper Patent Documents: Current as of: June, 1999 Click for Main Headings ... .~.~.~ Leaching or forming water ...

May 20, 2014· The US company Argonide (Sanford, FL, USA) is using 2 nm diameter aluminium oxide nanofibers (NanoCeram) as a water purifier. Filters made from 2 nm diameter aluminium oxide nanofibers (NanoCeram) can remove viruses, bacteria, and protozoan cysts from water.

Gold leaching, coal ... obtained a US patent for a leaching process for ... sphalerite in the leaching kinetics of zinc and lead in caustic a solution of 1 .0 M ...

The invention relates to modifications of a non-ammoniacal thiosulfate process of leaching precious metals (e.g. gold ... US Patent for Process of leaching ... soda ...

Chemical Treatment to Recover Molybdenum and Vanadium from ... Leaching with caustic soda ... “Value Recovery from Spent Alumina-Base Catalyst,” US Patent ...

The extract was then stripped with soda solution at pH=10.5 and a phase ... Leaching of gold in the anode slimes is ... US patent EP20110791989. 17 April ...

leaching of nickel_Pressure Acid Leaching of Nickel Laterites: A Review A review of the literature over the past 30 years on the processing of nickel laterites by high temperature acid leaching has been carried o

Gold leaching by organic base ... ,RU Patent. get price>> 9 ... method the fortified groundwater is pumped into theprecipitated by the addition of ammonia,hydrogen ...

Gold leaching process carried out by stirring the gold ore is mixed with ... Patent US4557759 - Iodine leach for the dissolution of gold. ... natural soda sectors;

Only two other patents were granted that year, one for a new candle-making process and the other the flour-milling machinery of Oliver Evans. The first patent. Only after 1955 were the original documents for Hopkins' patent located, together with a detailed disclosure and licensing prospectus he published in 1791.

... F. 1997, “Soda ash leaching of scheelite ... ore concentrates by caustic baking.” US Patent ... of soda ash leaching of low-grade ...

caustic soda reaction sodium ... 1939 UNITED STATES PROCESS OF MAKING SODIUM ALUMIINATE ... Method of producing vanadium compounds by alkaline leaching ...

Patent number: 7604785 Abstract: The present invention relates to a process for the recovery of elemental sulphur from residues produced in hydrometallurgical processes based on leaching with a solution of sodium sulphide in which the sulphur contained in the residues is selectively leached as sodium polysulphide.

Beneficiation Of Iron Ore Using Caustic Soda . ... Patent US3825419 ... iron-oxide hosted copper-gold ore, leaching, sulfuric acid medium, hindered dissolution. 1 ...

... US Patent ... ... to the gold ore leaching process ... Development of caustic / soda ash leach process for pre leach treatment of ... as well as gold pre-leach ...

us patent leaching gold for caustic soda. Beijing Branch. D501/D505, Lifi Space, Sixinzhuang Street, Chaoyang District Beijing, China. Factory Address.

Reductive Acid Leaching of Low Grade Manganese ... US Patent # 4,985,216. ... reducing roasting of gold ores - BINQ Mining.

of caustic soda in leaching gold in copper ... this invention provides a process of leaching gold from the ... caustic soda) ... us patent leaching gold for caustic soda.

The invention relates to modifications of a non-ammoniacal thiosulfate process of leaching precious metals (e.g. gold ... US Patent for Process of leaching ... soda ...

Apr 19, 1988· Desirably, the cyanide leach step involves the simultaneous complexing of gold in the slurry with the cyanide ions and adsorbing the gold onto activated carbon. In this manner, the gold-loaded activated carbon can be …

Jan 04, 1994· United States Patent ... A process for leaching gold and silver from ... pH value was kept constant at 11.0 by addition of soda lye. The leaching time was ...

A process is disclosed for the leaching of gold and silver from ores and ore concentrates through intimate contact of the ore or ore concentrate with an aqueous leach solution containing cyanide. The leach solution has a pH of 8 to 13.

... a mechanochemical leaching process using caustic soda at ... in order to clarify the kinetics governing the sodium hydroxide leaching of ... US Patent No ...

Gold Chemistry Leaching Processes CHEMISTRY of ... Û CYANIDE 4 Au + 8 CN+ O2 + 2 H2O = GOLD + CYANIDE CAUSTIC SODA ... of Modern United States Coins. ...

Processing Heap Leachable Gold Ore by Cyanidation Oxide ore (low grades) will be unloaded on the heap leach PAD. Lime must be added during the discharge in order to control pH. Harvesting must be performed after the ore discharge is completed in order to avoid compaction caused by the trucks during the leach cell construction.

United States Patent 9 Claims. (175-401 The present invention relates to a process for the leaching of pyrites and, more particularly, the present invention is concerned with the removal of impurities from pyrite cinders, for instance, the cinders obtained by roasting of pyrites in a fluidized bed.

PRODUCTION OF SODIUM BICARBONATE AND SODA ASH FROM ... F1 e United States Patent PRODUCTIN F SODIUM ... Production …