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Chlorine Gold Extraction

Gold extraction by chlorination using a pyrometallurgical ...

2009-3-1 · The objective of this research was, on one hand, to study gold extraction from an alluvial material, through a pyrometallurgical process, using chlorine gas as a reactant, and, on the other hand, to characterize the initial material and chlorination residues, using X-ray fluorescence (XRF), X-ray diffraction (XRD) and scanning electronic ...

Chlorine extraction of gold - DUNN; WENDELL E.

Chlorine extraction of gold . United States Patent 4353740 . Abstract: A process for treating a particulated gold bearing ore to recover the gold therein is disclosed. The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about 350° C. in the presence of iron to form ...

Gold extraction by chlorination using a pyrometallurgical ...

2009-12-3 · oxide, which has a great affinity with chlorine at working temper-atures (573–673 K). In the case of gold, this fact might be respon-sible for the increase in the gold volatilization from mineral since in the presence of iron chloride, a binary complex AuCl 3.FeCl 3 would be formed. Then, the following reactions for gold extraction might be ...

US4353740A - Chlorine extraction of gold - Google Patents

A process for treating a particulated gold bearing ore to recover the gold therein is disclosed. The process includes roasting the ore to remove sulfides as sulfur dioxide followed by chlorination of the ore at a temperature of about 350° C. in the presence of iron to form a mixture of volatile gold chlorides and volatile gold-iron chlorides in the chlorine off gases followed by condensing ...

Extraction of Gold

Bromine acts more energetically than chlorine, and has also been employed in the extraction. The recovery of the gold is effected similarly, and the bromine is then liberated by the action of chlorine, but it is impossible to prevent loss of bromine. Cyanide-process The extraction of gold by the cyanide-method is of great technical importance.

(PDF) Solvent extraction of gold from chloride solution by ...

Extraction percent of gold versus time, T=20 °C, [Au] =67 mg/l and [TBP] = 0.1M [A]:[O]=1:1. the results of these experimental runs; the total time needed for

New Chloride Leaching Process for Gold Extraction from ...

2017-8-28 · recently for gold extraction from refractory gold ores. In this process, oxygen and oxides ofnitrogen are the flotation carriers and a chloride solution containing HN03 is the reactive medium in which the hydrophobic particles ofthe ore are suspended. In operation, the outer walls of the froth cells are quickly saturated with oxygen and oxides of

Extraction of gold(III) from chloride media in aqueous ...

Gold(III) extraction Chloride extractants Aqueous two-phase system Polyethylene glycol DOI : 10.1016/j.seppur.2011.06.018 被引量: 39 年份: 2011 收藏 引用 批量引用 报错 分享 全部来源 免费下载 ...

dry chlorine extraction - Gold Refining Forum

2010-7-18 · Re: dry chlorine extraction Post by Barren Realms 007 » July 18th, 2010, 2:49 pm lazersteve wrote: One of my books states that chlorine gas reacts with gold at 200-250C.

The Chemistry of the Extraction of Gold - SAIMM

2011-5-29 · The Chemistry of the Extraction of Gold M.J. Nicol, C.A. Fleming and R.L. Paul 1S.1 General Principles 15.1.1 The chemistry of gold compounds Gold is the most noble of all the metals and this .is the key to both its eternal romance and its many practical uses in industry. It is the only metal, for

Gold extraction by chlorination using a pyrometallurgical ...

2009-12-3 · oxide, which has a great affinity with chlorine at working temper-atures (573–673 K). In the case of gold, this fact might be respon-sible for the increase in the gold volatilization from mineral since in the presence of iron chloride, a binary complex AuCl 3.FeCl 3 would be formed. Then, the following reactions for gold extraction might be ...

chlorine gold extraction - charlyshop.ch

chlorine gold extraction from hematite. Gold - Wikipedia Gold is a chemical element with the symbol Au from m and the atomic number 79 In its purest form it is a bright slightly reddish yellow...

(PDF) Solvent extraction of gold from chloride solution by ...

Extraction percent of gold versus time, T=20 °C, [Au] =67 mg/l and [TBP] = 0.1M [A]:[O]=1:1. the results of these experimental runs; the total time needed for equilibrium extraction of gold with ...

New Chloride Leaching Process for Gold Extraction from ...

2017-8-28 · recently for gold extraction from refractory gold ores. In this process, oxygen and oxides ofnitrogen are the flotation carriers and a chloride solution containing HN03 is the reactive medium in which the hydrophobic particles ofthe ore are suspended. In operation, the outer walls of the froth cells are quickly saturated with oxygen and oxides of

(PDF) Extraction of Gold and Silver in the Selective ...

2017-10-9 · Li et al. [20] also used the chlorination roasting method to extract gold and silver from cyanide tailings and found that after the recovery rate of gold and silver was up to 91.6% and 54.7% ...

Extraction of Gold(III) from Acidic Chloride Media Using ...

2021-3-12 · The present work addresses Au(III) extraction from chloride media using phosphonium-based ionic liquid (Cyphos IL 109) as a novel anion exchanger diluted in xylene. Gold(III) is extracted into the organic phase as [P66614+][AuCl4– ] and can easily be stripped by reduction to Au(I) with CS(NH2)2/HCl or Na2S2O3. A series of extraction-stripping cycles show a possible recirculation of

Mechanism of selective gold extraction from multi-metal ...

2020-3-19 · Mechanism of selective gold extraction from multi-metal chloride solutions by electrodeposition-redox replacement†. Ivan Korolev ab, Stylianos Spathariotis c, Kirsi Yliniemi d, Benjamin P. Wilson a, Andrew P. Abbott c and Mari Lundström * a a Hydrometallurgy and Corrosion, Department of Chemical and Metallurgical Engineering, Aalto University, 02150 Espoo, Finland.

US Patent for Chloride process for the leaching of gold ...

2013-4-8 · A process for the extraction of gold from a gold-bearing ore or concentrate, comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90° C. and an Eh of at least 900 mV. After a liquid/solids separation step, the solution obtained is subjected to an organic solvent ...

Mechanism of selective gold extraction from multi-metal ...

The electrodeposition-redox replacement (EDRR) process is a promising method for a selective extraction of minor metals from complex mixtures. When it is performed in a benign medium (such as sodium chloride solution or deep eutectic solvent), the EDRR method provides a non-toxic alternative for a convention 2020 Green Chemistry Hot Articles

dry chlorine extraction - Gold Refining Forum

2010-7-18 · Re: dry chlorine extraction Post by Barren Realms 007 » July 18th, 2010, 2:49 pm lazersteve wrote: One of my books states that chlorine gas reacts with gold at 200-250C.

Gold extraction by chlorination using a pyrometallurgical ...

2009-12-3 · oxide, which has a great affinity with chlorine at working temper-atures (573–673 K). In the case of gold, this fact might be respon-sible for the increase in the gold volatilization from mineral since in the presence of iron chloride, a binary complex AuCl 3.FeCl 3 would be formed. Then, the following reactions for gold extraction might be ...

chlorine gold extraction - charlyshop.ch

chlorine gold extraction from hematite. Gold - Wikipedia Gold is a chemical element with the symbol Au from m and the atomic number 79 In its purest form it is a bright slightly reddish yellow...

New Chloride Leaching Process for Gold Extraction from ...

2017-8-28 · recently for gold extraction from refractory gold ores. In this process, oxygen and oxides ofnitrogen are the flotation carriers and a chloride solution containing HN03 is the reactive medium in which the hydrophobic particles ofthe ore are suspended. In operation, the outer walls of the froth cells are quickly saturated with oxygen and oxides of

Extraction of Gold(III) from Acidic Chloride Media Using ...

2021-3-12 · The present work addresses Au(III) extraction from chloride media using phosphonium-based ionic liquid (Cyphos IL 109) as a novel anion exchanger diluted in xylene. Gold(III) is extracted into the organic phase as [P66614+][AuCl4– ] and can easily be stripped by reduction to Au(I) with CS(NH2)2/HCl or Na2S2O3. A series of extraction-stripping cycles show a possible recirculation of

Mechanism of selective gold extraction from multi-metal ...

2020-3-19 · Mechanism of selective gold extraction from multi-metal chloride solutions by electrodeposition-redox replacement†. Ivan Korolev ab, Stylianos Spathariotis c, Kirsi Yliniemi d, Benjamin P. Wilson a, Andrew P. Abbott c and Mari Lundström * a a Hydrometallurgy and Corrosion, Department of Chemical and Metallurgical Engineering, Aalto University, 02150 Espoo, Finland.

Recovery of gold from chloride solution with ion exchange ...

The extraction of gold from chloride solutions by ion exchange is examined. It is shown that at initial gold concentrations between 1-5 ppm, 20 g/l Cl-and pH 5, the kinetics of loading on weak base resins are slightly slower than those observed with activated charcoal. Equilibrium loading of auric chloride varies considerably as a function of pH from one resin to another.

Gold refining by solvent extraction—the Minataur™

2009-8-26 · A solvent-extraction route developed at Mintek for the chemical refining of gold from chloride media has shown considerable promise for the selective extraction of gold from silver, platinum-group metals (PGMs), and base metals, and has potential applications in the refining of gold from various feed materials. During the past year, two pilot-plant

US Patent for Chloride process for the leaching of gold ...

2013-4-8 · A process for the extraction of gold from a gold-bearing ore or concentrate, comprising the steps of leaching the gold-bearing ore or concentrate with a lixiviant of hydrochloric acid and magnesium chloride at atmospheric pressure at a temperature of at least 90° C. and an Eh of at least 900 mV. After a liquid/solids separation step, the solution obtained is subjected to an organic solvent ...

CHLORIDE HYPOCHLORITE OXIDATION AND LEACHING

2012-10-4 · substitute for chlorine. For extraction of gold from the refractory ores in which gold is surrounded by sul-fide minerals, oxidative pretreatment of the ore is essential to oxidize the sulfides and expose gold. Pyrometallurgical oxidation by roasting is encountered with environmen-tal limitations; thus hydrometallurgical methods are preferred.

dry chlorine extraction - Gold Refining Forum

2010-7-18 · Re: dry chlorine extraction Post by Barren Realms 007 » July 18th, 2010, 2:49 pm lazersteve wrote: One of my books states that chlorine gas reacts with gold at 200-250C.