SISTEMA DE EXTRACAO QUE EMPREGA UM EXTRATANTE DE AMINA QUATERNARIA E PROCESSO PARA A RECUPERACAO DE UM METAL PRECIOSO E RESINA TROCADORA DE ION

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.