Iron and zinc salts sepn. from acid etching soln. - by using organic extn. agent to remove zinc salt and sulphate ion producing agent to convert salt into insol. zinc sulphate, for pure prods.

摘要

The sepn comprises, contacting the etchant with an organic extn agent in a sepn appts so the zinc salt passes into the organic solvent. An SO4 ion-producing or- contg substance is mixed with the organic solvent to produce a surface phase reaction where the soluble zinc chloride is converted into the insol zinc sulphate and pptd out. ADVANTAGE - The energy saving sepn is used for salts sepn into technically pure end prods