EXTRACTION SYSTEM THAT USES A QUATERNARY AMINE EXTRACTANT AND PROCESS FOR THE RECOVERY OF A PRECIOUS METAL AND ION EXCHANGING RESIN

摘要

An improved extraction system employing a quaternary amine to extract anions from an aqueous solution, particularly precious metals such as gold or silver from an aqueous alkaline solution. The improvement comprises the use of a weak organic acid (a compound providing an acidic proton) along with the quaternary amine. The improvement is useful in both liquid-liquid and liquid-solid extraction systems.