摘要
硼酸作为一种关键的战略资源,其微量杂质去除技术仍存在不足,亟需开发高效且清洁的技术以提升资源利用率。文章针对工业硼酸中微量杂质的去除难题,采用阳离子交换树脂(LX-650)对盐湖老卤酸化法制备的粗硼酸进行了深度纯化研究。通过系统的表征和工艺优化,发现该树脂对Mg^(2+)具有显著的选择性去除能力,动态吸附效率可达99.99%,且硼的损失率低于0.5%。纯化后的硼酸纯度大于99.99%,树脂在经过5次循环使用后,吸附效率仍保持稳定,且吸附前后未出现明显的溶损现象。研究表明,LX-650树脂对硼酸体系的吸附行为符合Langmuir等温模型,吸附过程主要由准一级和准二级动力学共同主导。该技术实现了硼酸纯化工艺的绿色化与高效化,对于硼资源的高值化利用以及保障我国战略资源安全具有重要意义。
Boric acid is a critical strategic resource,yet current technologies for removing trace impurities remain insufficient,necessitating efficient purification methods to improve resource utilization.To address this challenge,we utilized cation exchange resin(LX-650)to purify the crude boric acid obtained through the acidification of salt lakes brine.Through systematic characterization and process optimization,the LX-650 resin demonstrated exceptional selectivity for Mg^(2+)removal,achieving 99.99%dynamic adsorption efficiency with less than 0.5%boron loss.The purified boric acid exceeded 99.99%purity,and the resin maintained stable adsorption efficiency over five cycles without noticeable dissolution.The adsorption behavior follows the Langmuir isotherm model,and the adsorption process is governed by pseudo-first order and pseudo-second-order kinetics.This technology enables green and efficient boric acid purification,offering significant potential for high-value boron resource utilization and strategic resource security.
作者
赵旭
李清鸿
王振刚
权彩兄
马彦龙
李陇岗
周红霞
朱发岩
张永明
ZHAO Xu;LI Qinghong;WANG Zhengang;QUAN Caixiong;MAYanlong;LI Longgang;ZHOU Hongxia;ZHU Fayan;ZHANG Yongming(School of Mechanical Engineering,Qinghai University,Xining,810016,China;Qinghai CITIC Guoan Lithium Industry Development Co.,Ltd.,Geermu,816000,China;CITIC(Beijing)Institute of Salt Technology&Industry Co.,Ltd.,Beijing,100020,China;Key Laboratory of Green and High-end Utilization of Salt Lake Resources,Qinghai Institute of Salt Lakes,Chinese Academy of Sciences,Xining,810008,China)
出处
《盐湖研究》
2025年第6期97-104,共8页
Journal of Salt Lake Research
基金
青海省重点研发项目(2022-GX-152)
国家重点研发计划项目(2023YFC2906603)。
关键词
离子交换法
硼酸
吸附动力学
等温吸附
Ion exchange method
Boric acid
Adsorption kinetics
Isotherm adsorption
