无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2020, Vol. 52 ›› Issue (2): 23-29.doi: 10.11962/1006-4990.2019-0153

• 研究与开发 • 上一篇    下一篇

沸石法苦卤提钾工艺研究

王木村1,郭小甫1,2,赵颖颖1,2,袁俊生1,2()   

  1. 1. 河北工业大学化工学院,天津 300130
    2. 海水资源高效利用化工技术教育部工程研究中心
  • 收稿日期:2019-08-25 出版日期:2020-02-10 发布日期:2020-02-26
  • 通讯作者: 袁俊生
  • 作者简介:王木村(1993— ),女,硕士研究生,研究方向为海洋化学资源利用与环境保护;E-mail:Wangmucun123@126.com。
  • 基金资助:
    国家重点研发计划项目(2016YFB0600504)

Process of potassium extraction from bittern with modified clinoptilolite

Wang Mucun1,Guo Xiaofu1,2,Zhao Yingying1,2,Yuan Junsheng1,2()   

  1. 1. School of Chemical Engineering and Technology,Hebei University of Technology,Tianjin 300130,China
    2. Engineering Research Center of Seawater Utilization Technology,Ministry of Education
  • Received:2019-08-25 Online:2020-02-10 Published:2020-02-26
  • Contact: Yuan Junsheng

摘要:

以改性斜发沸石为离子交换剂,采用离子交换技术,做了以氯化钠溶液为洗脱剂的苦卤提钾工艺研究。单柱实验表明,洗脱温度越高、洗脱剂浓度越大以及适当流速时有利于钾富集。吸附采用模拟移动床流程,进料顺序为“低段溶液-苦卤”,钾平均吸附率可达95%以上;洗脱采用固定床流程,进料顺序为“高段溶液-中段溶液-低段吸后溶液-25%(质量分数)NaCl溶液”,得到氯化钾平均质量浓度为35.39 g/L的富钾卤水,较苦卤钾浓度提高2.7倍。在钾富集同时,苦卤中的镁、硫酸根等杂质离子亦得到了有效去除,为实现苦卤高效节能提钾奠定了基础。

关键词: 钾富集, 苦卤, 改性沸石, 模拟移动床

Abstract:

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.

Key words: potassium enrichment, bittern, modified clinoptilolite, simulated moving bed

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