Preparation of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel and application of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel in extraction of lithium from salt lake brine

A technology of graphene composite and salt lake brine, which is applied in water/sewage treatment, adsorption water/sewage treatment, water/sludge/sewage treatment, etc. The effect of shortening the time, less corrosion of equipment, and reducing the amount of acid used

Active Publication Date: 2020-06-09
HEFEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the salt lake area has a vast geographical area, huge brine stock and complex composition, and it is impossible to selectively extract lithium from salt lake brine directly by electrodeion exchange.

Method used

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  • Preparation of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel and application of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel in extraction of lithium from salt lake brine
  • Preparation of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel and application of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel in extraction of lithium from salt lake brine
  • Preparation of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel and application of conductive manganese-titanium lithium ion sieve/graphene composite hydrogel in extraction of lithium from salt lake brine

Examples

Experimental program
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Effect test

Embodiment 1

[0044] 1. Preparation of conductive manganese-titanium lithium ion sieve / graphene composite hydrogel (HMnTi / GNs-LIPs)

[0045] (1) Preparation of manganese-titanium lithium ion sieve (HMnTi)

[0046] In 100 mL of 50% ethanol aqueous solution, 1.8 g of lithium acetate was added (solution A). In 100 mL of 90% ethanol aqueous solution, 4.5 g of manganese chloride, 7.5 g of tetrapropyl titanate and 3.5 g of triethanolamine were sequentially added (solution B). Add A dropwise to B, add 2mL, 1M phosphoric acid to form sol solution C. React C at 90°C for 6 hours to form a sol-gel, and the precursor D can be obtained after grinding. D is roasted, firstly temperature programmed at 5 °C / min to 300 °C, and reacted for 10 h; then programmed at 10 °C / min to 700 °C, reacted for 8 h to form a manganese-titanium lithium complex (marked as LiMnTi). The LiMnTi was washed with 5% hydrochloric acid for 6 hours and then dried to form a manganese-titanium lithium ion sieve (HMnTi) for future use...

Embodiment 2

[0056] 1. Preparation of conductive manganese-titanium lithium ion sieve / graphene composite hydrogel (HMnTi / GNs-LIPs)

[0057] (1) Preparation of manganese-titanium lithium ion sieve (HMnTi)

[0058] In 100 mL of 90% aqueous ethanol, 2 g of lithium chloride was added (solution A). In 100 mL of 90% ethanol aqueous solution, 6 g of manganese carbonate, 17 g of tetrabutyl titanate and 4 g of tartaric acid were sequentially added (solution B). After A was added dropwise to B, 1 mL of 1M hydrochloric acid was added to form sol solution C. React C at 55°C for 10 hours to form a sol-gel, and the precursor D can be obtained after grinding. Roast D, firstly heat up to 380°C at 10°C / min, and react for 15 hours; then heat up to 800°C at 5°C / min, and react for 10 hours to form a manganese-titanium lithium complex (marked as LiMnTi). The LiMnTi was washed with 5% hydrochloric acid for 6 hours and then dried to form a manganese-titanium lithium ion sieve (HMnTi) for future use.

[0059]...

Embodiment 3

[0068] 1. Preparation of conductive manganese-titanium lithium ion sieve / graphene composite hydrogel (HMnTi / GNs-LIPs)

[0069] (1) Preparation of manganese-titanium lithium ion sieve (HMnTi)

[0070] In 100 mL of 60% aqueous ethanol, add 5 g of lithium sulfate (solution A). In 100 mL of 90% ethanol aqueous solution, 5.4 g of manganese carbonate, 5.2 g of tetrapropyl titanate, and 1.8 g of citric acid were sequentially added (solution B). Add A dropwise to B, add 2mL, 1M sulfuric acid catalyst to form sol solution C. React C at 90°C for 3 hours to form a sol-gel, and the precursor D can be obtained after grinding. D is roasted, firstly temperature programmed at 5 °C / min to 300 °C, and reacted for 10 h; then programmed at 10 °C / min to 700 °C, reacted for 8 h to form a manganese-titanium lithium complex (marked as LiMnTi). The LiMnTi was washed with 5% hydrochloric acid for 6 hours and then dried to form a manganese-titanium lithium ion sieve (HMnTi) for future use.

[0071] ...

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Abstract

The invention discloses preparation of conductive manganese-titanium lithium ion sieve / graphene composite hydrogel and an application of the conductive manganese-titanium lithium ion sieve / graphene composite hydrogel in extraction of lithium from salt lake brine. A manganese-titanium lithium ion sieve is prepared by adopting a sol-gel method, and manganese-titanium lithium ion sieve / graphene composite hydrogel (MnTi / GNs-LIPs) is prepared by adopting an in-situ thermal initiation polymerization method. According to the method, an adsorption-electrodeionization exchange method is adopted, the MnTi / GNs-LIPs adsorbent selectively adsorbs lithium in the salt lake brine and then is placed in a single weakly acidic solution, lithium is rapidly desorbed through electrodeionization exchange, and the purpose of recycling lithium in the salt lake brine in a classified mode can be achieved after repeated operation.

Description

technical field [0001] The invention relates to a material and method for extracting lithium from salt lake brine, in particular to the preparation of a conductive manganese-titanium lithium ion sieve / graphene composite hydrogel and its application in extracting lithium from salt lake brine. Background technique [0002] The demand for lithium from clean energy at home and abroad is increasing day by day. Salt lake brine has complex components and rich lithium resources, but it is difficult to separate them. Although the ion exchange adsorption method needs to go through tedious processes such as adsorption, desorption, backwashing, regeneration, and metal extraction, it is often used to extract lithium from salt lake brine due to its simple process (Jia Xuhong et al., Guangzhou Chemical Industry, 38, 2010, 10). Lithium manganate ion sieve is one of the preferred adsorbents because of its good lithium adsorption performance and high cost performance (Ma Peihua et al., appli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/28C02F1/28C02F1/469B01J20/30
CPCB01J20/20B01J20/0222B01J20/0211B01J20/04B01J20/28047C02F1/281C02F1/283C02F1/4691B01J20/26C02F1/285C02F2103/007
Inventor 晋冠平崔静思孟盖军方雨虹
Owner HEFEI UNIV OF TECH
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