Alkaline Cleaning of Ion-Exchange Resins
摘要
The paper investigates the ion-exchange resin cleaning during processing of pregnant solutions obtained by in-situ leaching. Sodium and ammonium hydroxides and AMP and Purolite ion-exchange resins are used for cleaning. Regeneration of ion-exchange resins with and without preliminary cleaning is studied herein. The efficiency analysis of described processes is based on mass spectrometry, spectrophotometry, and X-ray fluorescence of the impurity content in alkali washes. It is found that alkaline cleaning is effective for washing silicon and phosphorus.