溶剂萃取-树脂吸附联合脱除盐湖老卤中的微量硼

doi:10.16085/j.issn.1000-6613.2017-0106

化工进展 ›› 2017, Vol. 36 ›› Issue (10): 3625-3632.DOI: 10.16085/j.issn.1000-6613.2017-0106

溶剂萃取-树脂吸附联合脱除盐湖老卤中的微量硼

王雄¹, 刘明言^1,2, 宋军超¹

1. 天津大学化工学院, 天津化学化工协同创新中心(天津), 天津 300350;
2. 化学工程联合国家重点实验室(天津大学), 天津 300350

收稿日期:2017-01-17 修回日期:2017-04-26 出版日期:2017-10-05 发布日期:2017-10-05
通讯作者: 刘明言,教授,主要研究方向为多相流及传递过程强化.
作者简介:王雄(1991-),硕士研究生.E-mail:wangxiong105@126.com.

Removal of micro-amount boron from salt lake brine by solvent extraction-resin adsorption combined method

WANG Xiong¹, LIU Mingyan^1,2, SONG Junchao¹

1. Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2. China State Key Laboratory of Chemical Engineering(Tianjin University), Tianjin 300072, China

Received:2017-01-17 Revised:2017-04-26 Online:2017-10-05 Published:2017-10-05

摘要/Abstract

摘要： 采用溶剂萃取-树脂吸附联合的方法对青海盐湖卤水中的硼进行了提取和脱除。研究了pH、相比和萃取级数对萃取过程的影响，讨论了萃取后卤水的pH和树脂用量等对吸附过程的影响，考察了D564树脂的吸附等温线和吸附动力学特性，并对反萃和洗脱过程进行了优化。研究结果表明：萃取过程中卤水pH为2时，萃取效果最佳，相比和萃取级数增加至3后继续增加相比和萃取级数对进一步降低卤水中硼浓度的作用并不明显；吸附过程中卤水的pH最佳值为7，吸附动力学数据符合准二级动力学模型，吸附等温线数据符合Langmuir等温吸附模型；当树脂用量为6g/（100mL卤水）时，可直接将一级萃取后卤水中的硼浓度降低至1.0mg/L以下；建议使用0.1mol/L的NaOH溶液作反萃剂，0.5mol/L的HCl溶液作洗脱剂。

关键词: 溶剂萃取, 吸附, 硼酸, 盐湖卤水

Abstract: A solvent extraction-resin adsorption combined method was developed to recover and remove micro-amount boron from brine of salt lake in Qinghai. The effects of pH,phase ratio, extraction stages on extraction process, and the effect of pH of brine after first stage extraction, resin dosage on boron adsorption were investigated. The adsorption isotherm and kinetics were studied. The stripping and elution process were also optimized. The results showed that best extraction result could be obtained when pH was 2. The reduction of boron concentration was not obvious when the phase ratio and extraction stage value were above 3. The best pH for boron adsorption from brine was 7. The adsorption kinetics and adsorption isotherm data were fitted well with pseudo-second-order rate model and Langmuir model,respectively. The concentration of boron could be reduced to 1.0mg/L or less when resin dosage is 6g/(100mL brine) using the extraction-adsorption combined method. The proper stripping agent and eluent were 0.1mol/L NaOH and 0.5mol/L HCl, respectively.

Key words: solvent extraction, adsorption, boric acid, salt lake brine

中图分类号:

TQ128⁺.54

王雄, 刘明言, 宋军超. 溶剂萃取-树脂吸附联合脱除盐湖老卤中的微量硼[J]. 化工进展, 2017, 36(10): 3625-3632.

WANG Xiong, LIU Mingyan, SONG Junchao. Removal of micro-amount boron from salt lake brine by solvent extraction-resin adsorption combined method[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3625-3632.

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溶剂萃取-树脂吸附联合脱除盐湖老卤中的微量硼

Removal of micro-amount boron from salt lake brine by solvent extraction-resin adsorption combined method

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