摘要
本文系统总结了碳酸锂中硫酸根脱除的研究现状,简要介绍了各种杂质脱除方法的原理和优劣势,指出了深度除杂技术的发展趋势。其中,化学沉淀法的操作简单,但存在易引入新杂质、固废产生量大等缺点。氢化-络合法具有工艺流程简单、产品纯度高等优势,但易发生杂质积累,且原料的适用性差。离子交换树脂法仅适用于杂质含量低的初级碳酸锂,存在交换容量小、生产成本高等不足。纳滤膜法克服了上述工艺的不足,兼具操作易控制、除杂效果佳等优点,具有工业化应用前景。
The research progress on the removal of sulfate from lithium carbonate were systematically summarized in this paper,the development trend of deep sulfate impurity removal technology were also put forward via a brief instruction of the principles,advantages and disadvantages of various sulfate removal methods.Among them,the chemical precipitation method had the advantage of simple operation,while there were some disadvantages such as the introduction of new impurities and a large amount of solid waste production.The hydrogenation-complexation method had the drawbacks of impurity enrichment and poor applicability of raw materials,though it had the advantages of a simple process and high purity of production.The ion exchange method had the shortcomings of small exchange capacity and high production cost,limited to the application of primary lithium carbonate containing low impurities.The nanofiltration membrane method overcame the shortcomings of the above methods and had the advantages of easy operation control and efficient impurity removal,indicating the prospect of industrial application.
作者
李立平
邱焕彬
李煜乾
黄司平
LI Liping;QIU Huanbin;LI Yuqian;HUANG Siping(Guangdong Guanghua Sci-tech Co.,Ltd.,Shantou 515000,China)
出处
《化工技术与开发》
CAS
2024年第12期37-39,76,共4页
Technology & Development of Chemical Industry
基金
国家重点研发计划青年科学家项目(2022YFC2906000)。
关键词
高纯碳酸锂
硫酸根
杂质脱除
优劣势
发展趋势
high purity lithium carbonate
sulfate
impurity removal
advantages and disadvantages
development trend
