离子交换树脂法回收水中离子液体

doi:10.16085/j.issn.1000-6613.2017.04.008

化工进展 ›› 2017, Vol. 36 ›› Issue (04): 1209-1216.DOI: 10.16085/j.issn.1000-6613.2017.04.008

离子交换树脂法回收水中离子液体

隋红^1,2,3, 牛雅琪¹, 李鑫钢^1,2,3, 何林^1,3

1 天津大学化工学院, 天津 300072;
2 精馏技术国家工程研究中心, 天津 300072;
3 天津化学化工协同创新中心, 天津 300072

收稿日期:2016-09-02 修回日期:2016-10-12 出版日期:2017-04-05 发布日期:2017-04-05
通讯作者: 何林,博士后,主要从事油砂资源利用研究。E-mail:linhe@tju.edu.cn。
作者简介:隋红(1976-),女,副教授,主要从事化工分离、非常规石油能源利用方面研究。
基金资助:
国家自然科学基金项目（41471258）。

Recovery of ionic liquid from aqueous solution by ion-exchange resin

SUI Hong^1,2,3, NIU Yaqi¹, LI Xingang^1,2,3, HE Lin^1,3

1 School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China;
2 National Engineering Research Centre of Distillation Technology, Tianjin 300072, China;
3 Collaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin 300072, China

Received:2016-09-02 Revised:2016-10-12 Online:2017-04-05 Published:2017-04-05

摘要/Abstract

摘要： 目前离子液体辅助油砂萃取工艺中直接蒸馏回收离子液体的能耗较大。为了降低能耗、节约操作成本，本文提出了先用离子交换树脂对离子液体溶液进行离子交换预处理以降低水含量，然后进行蒸馏的方法。采用离子交换树脂AMBERJET 1200Na对模拟水洗所得的离子液体溶液进行处理，以回收其中的离子液体[EMim]BF₄，通过调整吸、脱附工艺参数得到了最佳工艺条件，并深入分析了吸附机理。采用上述最佳条件，对真实油砂矿水洗得离子液体溶液进行了回收，进一步验证并完善了工艺条件。得出当水洗的离子液体溶液体积为150mL、浓度为10 g/L、树脂用量为5g、吸附温度为293K、吸附时间为15min时吸附率达97%以上；当脱附温度为333K、盐酸脱附剂质量分数为15%时脱附率达93%以上；经蒸馏，[EMim]⁺回收率达91%以上。研究结果还表明：本工艺具有较好的节能效果，与直接蒸馏相比，能耗降低45%以上。

关键词: 离子液体, 离子交换, 吸附, 脱附, 回收

Abstract: The ionic liquid enhanced bitumen recovery from oil sands has been considered a promising process for the unconventional oil production. However,the recovery of ionic liquid from the residual solids is a challenge due to the high energy consumption if the direct distillation is applied. A new technology was proposed to pretreat the ionic liquids solution with ion-exchange resins (AMBERJET 1200Na). The concentrated ionic liquid was further separated by distillation. The optimal operational conditions were obtained by adjusting parameters of adsorption and desorption. The mechanism of the adsorption process was also analyzed. To confirm the above results,the real ionic liquids solution obtained from the water washing was applied as sample which was processed under the above optimal conditions. The results showed that the efficiencies of adsorption,desorption and recovery were over 97%,93% and 91%,respectively when 5g resin dosage was used to treat the ionic liquid solution (10g/L) at 293K for the adsorption and 333K for desorption. Finally,it was found that this process could save energy by 45% compared with the direct distillation under laboratory conditions.

Key words: ionic liquids, ion exchange, adsorption, desorption, recovery

中图分类号:

TQ322.4

隋红, 牛雅琪, 李鑫钢, 何林. 离子交换树脂法回收水中离子液体[J]. 化工进展, 2017, 36(04): 1209-1216.

SUI Hong, NIU Yaqi, LI Xingang, HE Lin. Recovery of ionic liquid from aqueous solution by ion-exchange resin[J]. Chemical Industry and Engineering Progress, 2017, 36(04): 1209-1216.

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离子交换树脂法回收水中离子液体

Recovery of ionic liquid from aqueous solution by ion-exchange resin

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