Bromine Compounds Limited

Ran Elazari

Hanan Sertchook

Ben-Zion Magnes

Iris Ben-David

Eli Lancry

Ronny Costi

Igor Kompaniets

Or Press Frimet

Ofer Cohen

Ronen Naim

A process for recovering gold from a refractory gold ore, comprising the steps of: electrolyzing a mixture consisting of the ore particles and an aqueous bromide solution in an electrolytic cell having anode and cathode, wherein bromine is produced at the anode by oxidation of the bromide, thereby dissolving gold in the aqueous phase; separating the ore particles from the aqueous phase to obtain a leach liquor; adjusting the pH of the leach liquor to the alkaline range to produce a gold-containing precipitate; collecting the gold-containing precipitate and recycling a bromide-containing barren solution for reuse as an aqueous bromide feed solution.

Process for recovering gold from ores

The invention relates to a method for treating emergency spill or leak of halogen which is bromine or chlorine, comprising contacting an aqueous solution of quaternary ammonium halide with the halogen.

Quarternary ammonium halides for treating halogen contamination

The invention relates to a method of operating a zinc-bromine battery, especially at a high temperature, comprising adding 1-n-butyl-2-methyl-pyridinium bromide to the electrolyte of said battery, and charging or discharging said cell. Also provided is the use of 1-n-butyl-2-methyl-pyridinium bromide as an additive in a zinc-bromine battery operating at a temperature above 30&#xb0; C., and an aqueous concentrate with high content of 1-n-butyl-2-methyl-pyridinium bromide.

Additive for a flow battery

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Beer-Sheva, Israel

Ran Elazari