沸石法苦卤提钾工艺研究
收稿日期: 2019-08-25
网络出版日期: 2020-02-26
基金资助
国家重点研发计划项目(2016YFB0600504)
Process of potassium extraction from bittern with modified clinoptilolite
Received date: 2019-08-25
Online published: 2020-02-26
王木村 , 郭小甫 , 赵颖颖 , 袁俊生 . 沸石法苦卤提钾工艺研究[J]. 无机盐工业, 2020 , 52(2) : 23 -29 . DOI: 10.11962/1006-4990.2019-0153
Based on ion exchange technology,the potassium extraction technology from bittern was studied.The modified clinoptilolite and sodium chloride solution were respectively as ion exchanger and eluent.The single-column experiments showed higher elution temperature,higher concentration of eluent and appropriate flow rate were beneficial to potassium enrichment.The adsorption adopted the simulated moving bed process,which feeding order was low concentration solution and bittern in turn.The average adsorption rate of potassium ion was above 95%.The elution adopted fixed bed process,which feeding order was high concentration solution,middle concentration solution,low concentration solution after adsorption and sodium chloride solution of 25%(mass fraction).Average mass concentration of potassium chloride in the potassium-rich brine was 35.39 g/L,which rose 2.7 times higher than the bittern.At the same time of potassium enrichment,the impurities had been effectively removed in bittern,such as magnesium ion and sulfate ion.This research lays a foundation for high efficiency and energy saving on potassium ion extraction of bittern.
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