Studies Relating to Cathodic Reduction of …

The inhibition effect of the chromium hydroxide film for the reduction of hypochlorite has so far been studied on gold, platinum and iron electrodes in sodium hydroxide and sodium chlorate solution. But there is no reports were available in the

Destruction of cyanide waste solutions using …

Ritchie, 2000). The reaction with silver is similar. How-ever, the silver cyanide complex is weaker than the gold cyanide complex and, therefore, more concentrated

What is Sodium Hypochlorite (Bleach)? - Powell Fab

Sodium Hypochlorite is a greenish-yellow liquid commonly referred to as Bleach. Sodium hypochlorite produced by a continuous process will have approximately 0.2% by weight excess sodium hydroxide, resulting in a specific gravity of 1.160 at 120 gpl.

Product Stewardship Summary Sodium Hypochlorite

Product Stewardship Summary Sodium Hypochlorite ... Sodium hypochlorite is used as a disinfectant; ... process, store, and/or transfer sodium hypochlorite.

Advances in Gold and Silver Processing

cyanidation process in 1887. ... produced when gold is reacted with sodium hypochlorite. Hydrochloric acid is required to neutralize the hydroxide and maintain the

Sodium Hypochlorite Handbook - Occidental …

using sodium hypochlorite. ... he patented a process for the ... sodium hypo- sodium cation chlorite hypochlorite anion The ...

CHLORIDE HYPOCHLORITE OXIDATION AND …

CHLORIDE–HYPOCHLORITE OXIDATION AND LEACHING OF REFRACTORY SULFIDE GOLD CONCENTRATE ... Calcium hypochlorite is more stable than sodium hypochlorite and

Sodium hypochlorite - GoldRefiningWiki

Sodium hypochlorite (NaOCl) is a white inorganic water soluble salt. Commonly found as bleach in general stores. In refining it is used mixed with hydrochloric acid for dissolving gold. It isn't as effective as aqua regia but it is a workable substitute for people that have difficult to get nitric acid.

How to Leach Gold Ore With Chlorination | Sciencing

Place the gold ore in the cement mixer. Pour in the hot water, bleach and HCL. The mixture should be 15 percent sodium hypochlorite and 33 percent hydrochloric acid.

Sodium hypochlorite - Wikipedia

Sodium hypochlorite is a chemical compound with the formula NaOCl or NaClO, comprising a sodium cation ... In the process, sodium hypochlorite (NaClO) ...

Detoxification of Cyanide in a Gold Processing Plant ...

In laboratory experiments, cyanide in waste water from the Muteh gold mine in Iran was oxidized by sodium and calcium hypochlorite to cyanate (CNO −), which is 1,000 times less environmentally hazardous than cyanide. Experiments were conducted using waste water containing 270 mg/L cyanide over a ...

Frequently Asked Questions (FAQs) about Sodium ...

Investigations have shown sodium hypochlorite to be an effective disinfectant having broad applications. Although a number of other disinfectants (calcium hypochlorite, ozone, UV, solar disinfection) and treatment processes (filters, slow sand filtration) have been investigated, sodium hypochlorite ...

The Chemistry of the Extraction of Gold

THE CHEMISTRY OF THE EXTRACTION OF GOLD necessary to take this argument a step further. In general, whether the oxidation of gold to the complex AuL; or AuL!+ occurs in the presence of

Sodium Hypochlorite General Information Handbook

In summary, if the process uses one pound of chlorine, the process will use one gallon of sodium hypochlorite at strength of 120 gpl available chlorine. 2.4 Sodium Hypochlorite Chemistry for Less than 22.4% Sodium Hydroxide Feedstock

US4151052A - Process for producing sodium hypochlorite ...

A process for producing sodium hypochlorite comprising electrolyzing an aqueous solution of sodium chloride as an electrolyte solution in a non-diaphragm electrolytic cell comprising at least one unit cell in which the ratio of the actual area of the anode to the actual area of the cathode is at least about 1.5: 1. In a preferred embodiment higher concentrations of sodium hypochlorite …

PRODUCT PROFILE - Hill Brothers Chemical Co.

PRODUCT PROFILE Hill Brothers Chemical Co. Industrial Chemicals & Construction Products Since 1923 SODIUM HYPOCHLORITE STABILITY Hill Brothers takes extra measures to ensure high quality bleach is produced to improve the stability of sodium hy- pochlorite by using strict raw material specifications and implementing a precise process …

Sodium Hypochlorite Handbook - Occidental …

he patented a process for the manufacture of bleaching powder where chlorine gas was absorbed in a dry lime hydrate. Labarraque succeeded, in 1820, in preparing sodium hypochlorite by chlorinating a solution of caustic soda. Varying concentrations of this solution have found a multitude of applications so that the general public is now well …

Hypochlorite Leaching of Gold Ore | Hydrochloric Acid ...

Effect of Hypochlorite Concentration on Cold Extraction from an A u PPT: sodium chloride was maintained at 0.5 % sodium hypochlorite solution.5 % 1 9.5 % NaOCl solution RESULTS AND DISCUSSION in one hour and 95 % of the gold dissolved in a 2 % NaOCl solution in 30 minutes.5 9. 1 g/L NaCl and 2 g/L respectively while the …

The iGoli mercury-free gold extraction process - …

The iGoli process is a modern version of chlorination, and uses a mixture of pool acid (dilute hydrochloric acid), bleach (sodium hypochlorite) and sodium metabisulphate to leach and recover metallic gold [38, 39,187]. ...

Sodium cyanide - Formula, Structure, MSDS, Uses and ...

Sodium gold cyanide and sodium hydroxide are the respective products of this extraction process. 4 Au + 8 NaCN + O 2 + 2 H 2 O → 4 Na[Au(CN) 2] + 4 NaOH The above reaction is normally addressed as cyanide process or gold cyanidation. It is typically a metallurgical technique, in which low-grade ores are generally used. There …

Dissolving Gold and Precipitating Gold - Pyrometallurgy ...

Mixing muriatic acid (hydrochloric acid) with bleach (sodium hypochlorite), you are freeing chlorine to attack the gold. You are making gold chloride. Try exposing the solution to ultraviolet light, to break the bond between the gold …

Leaching of an oxide gold ore with chloride/hypochlorite ...

Leaching of an oxide gold ore with chloride/hypochlorite solutions. ... to achieve maximum gold recovery of 58% compared to sodium ... this process was ...

Safety Data Sheet Sodium Hypochlorite, 12.5%

Safety Data Sheet Sodium Hypochlorite, 12.5% SDS Revision Date: 05/06/2015 Page 3 of 8 Eyes In case of contact, immediately flush eyes with plenty of water for at least 15 minutes. Remove contact lenes, if present and easy to do. Continue rinsing.

Sodium Hypochlorite Ore Beneficiation - …

hypochlorite leaching of gold ore_ Download as PDF - InTechFeb 1, 2012 The poor extraction of refractory gold ores is an old and still existing problem Oxidation of carbon and sulfide minerals by sodium hypochlorite is a pul

SODIUMH YPOCHLORITE - Texas Process

Commonly known as bleach, sodium hypochlorite is used in a variety of applications, particularly for the disinfection of drinking water and wastewater.

US4151052A - Process for producing sodium hypochlorite ...

A process for producing sodium hypochlorite comprising electrolyzing an aqueous solution of sodium chloride as an electrolyte solution in a non-diaphragm electrolytic cell comprising at least one unit cell in which the ratio of the actual area of the anode to the actual area of the cathode is at least about 1.5: 1.

SODIUM HYPOCHLORITE MANUAL - Olin Chlor Alkali

Sodium hypochlorite was first manufactured in smaller quantities with the purpose of neutralizing chlorine sources obtained from chemical piping, process streams, processing equipment, or shipping containers before performing maintenance activities.

Sodium Hypochlorite | USP Technologies

Sodium hypochlorite has been used for over 30 years in hydrogen sulfide control applications and is a well understood technology. Sodium hypochlorite oxidizes hydrogen sulfide and organic odors. If overdosed, sodium hypochlorite can inhibit biofilm growth thereby reducing hydrogen sulfide formation in collection system piping. Sodium ...