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引言目前在工业上混合希土的生产都沿用经复盐、碱转化、沉淀的方法,如果能用萃取法代替复盐沉淀法生产希土,将大大有利于生产的连续化和自动化,有利于适应日益发展的希土广泛应用的要求,因此用伯胺萃取除去包头矿浓硫酸焙烧后的水浸液中的钍后,为了探索一条不经复盐、碱转化沉淀等生产希土的新工艺,自76年5月“长春伯胺萃取会议”后,国内13个单
I. INTRODUCTION At present, in the industry, the production of mixed relics is based on the method of double salt, alkali conversion and precipitation. If the extraction method can replace the double salt precipitation method to produce relic, it will greatly facilitate the continuous production and automation of production. In order to meet the increasing requirements of extensive application of rare earths, after removing thorium in the aqueous solution after the roasting of the concentrated sulfuric acid of Baotou Mine by primary amine extraction, in order to explore a new process for producing rare earth without double salt, alkali conversion and precipitation Since May 76 “Changchun primary amine extraction conference”, the domestic 13 single