钛系锂离子筛粉体与PVDF树脂纺丝成型及性能研究

doi:10.19964/j.issn.1006-4990.2022-0739

Abstract

Abstract:

In order to realize the granulation molding of titanium-based lithium ion sieve（H₂TiO₃-LIS） powder and large-scale application in lithium extraction from salt lakes，H₂TiO₃-LIS powder was formed by spinning.The optimal formula and process conditions were determined，the amount of PVDF was accounted for 20% of the total mass of PVDF and H₂TiO₃-LIS powder，the amount of PVP-K60 was accounted for 80% of the mass of PVDF，the temperature of the solidification bath was 80 ℃，the length of the air section was 20 cm，and the length of the shredding was 3 mm.The granulated adsorbent was used in the lithium extraction test of Golmud Salt Lake brine.The results showed that the mass adsorption capacity of the H₂TiO₃-LIS particle adsorbent for Li⁺ was 9.3 mg/g and the volume adsorption capacity was 3.6 g/L，and the operation stability was good.After 30 cycles，the adsorption capacity was 92.5% of the initial adsorption capacity.

Key words: titanium-based lithium ion sieve, lithium extraction from salt lake, PVDF, spinning forming, adsorption capacity, stability

CLC Number:

TQ131.1

HU Yue, MO Hengliang, LI Tianyu, PENG Wenjuan, SUN Guangdong, XIAO Hongkang, CHEN Yili, LI Suoding, TANG Yang. Study on spinning molding and performance of Ti-based lithium ion sieve powder and PVDF resin[J]. Inorganic Chemicals Industry, 2023, 55(11): 58-63.

Figures/Tables 10

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离子	离子质量浓度/（mg·L^-1）	离子	离子质量浓度/（mg·L^-1）
Li⁺	260	Ca²⁺	10
Na⁺	44 060	Cl^-	52 360
K⁺	7 820	SO₄^2-	5 060
Mg²⁺	80	CO₃^2-	18 830

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Study on spinning molding and performance of Ti-based lithium ion sieve powder and PVDF resin

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