▎ 摘　　要

NOVELTY - Preparing ultrapure ammonia water involves evaporating the liquid ammonia raw material to obtain the ammonia, separating the ammonia and liquid, and carrying out active carbon adsorption treatment to obtain primary ammonia, subjecting the primary ammonia gas to resin adsorption to remove the oil, removing oil treatment of the steam ammonia for water-gas separation to obtain the gas and secondary ammonia, using ultrapure water of the secondary ammonia for multi-stage absorption to obtain primary ammonia water, using metal ion adsorbent of the primary ammonia water for metal ion adsorption obtaining the secondary ammonia water, treating the secondary ammonia water for ultra-filtration to obtain ultrapure ammonia water. USE - Method for preparing ultrapure ammonia water. ADVANTAGE - The method can reach the effect of improving the purity of ultra-pure ammonia water.