Lithium extraction adsorbent for raw brine and preparation method thereof

A technology of adsorbent and solvent, which is applied in the field of lithium extraction adsorbent for raw halogen and its preparation, can solve the problems of long time required for working adsorption capacity, low content of lithium in raw halogen, and low lithium extraction efficiency, so as to improve lithium adsorption efficiency , Improve the adsorption rate and improve the utilization rate

Active Publication Date: 2021-01-19
XIAN LANSHEN NEW MATERIAL TECHNOLOGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lithium content of the original halogen is generally low, and contains a large number of coexisting ions. When the traditional aluminum-based lithium extraction adsorbent extracts lithium from the original halogen, the adsorption rate is low, and it takes a long time to reach the working adsorption capacity, resulting in lithium extraction efficiency. low, which restricts the application of aluminum-based lithium extraction adsorbents in the extraction of lithium from the original halide

Method used

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  • Lithium extraction adsorbent for raw brine and preparation method thereof
  • Lithium extraction adsorbent for raw brine and preparation method thereof
  • Lithium extraction adsorbent for raw brine and preparation method thereof

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preparation example Construction

[0035] The invention provides a preparation method of an adsorbent for extracting lithium with lithium, comprising the following steps:

[0036] S1. Crush 0-0.3 parts of cross-linked polystyrene resin (referred to as white balls, provided by Shaanxi Lanshen Special Resin Co., Ltd.), soak in a sufficient amount of solvent, fully expand, and then filter off the free solvent;

[0037] White balls are unqualified particle size products produced during the production process of the factory. The basic skeleton is styrene and divinylbenzene. The particle size of the powder obtained after crushing is 60-200 mesh.

[0038]Solvents include N,N-dimethylformamide, ethyl acetate, dichloromethane, chloroform, carbon tetrachloride, dichloroethane, trichloroethane, acetone, toluene, etc. The expansion and kneading process uses the same a solvent.

[0039] S2, the lithium extraction adsorbent active body powder (provided by Shaanxi Lanshen Special Resin Co., Ltd.), binder, white ball powder a...

Embodiment 1

[0049] 30.0 g of white balls (provided by Shaanxi Lanshen Special Resin Co., Ltd.) were crushed into a powder with a particle size of 200 mesh, fully expanded with sufficient amount of carbon tetrachloride, and then free carbon tetrachloride was filtered off.

[0050] Knead 100.0g lithium extraction adsorbent active body powder (provided by Shaanxi Lanshen Special Resin Co., Ltd.), 30.0g polyvinyl chloride, expanded white ball powder, and 150.0g carbon tetrachloride evenly. Extrude, crush, and sieve, collect all particles with a particle size in the range of 0.8-1.2mm, and dry at 100°C for 2 hours as a semi-finished product. The semi-finished product was washed with 1 mol / L dilute hydrochloric acid, then washed with pure water until neutral, and the free water was removed by suction filtration to obtain the finished product 1.

Embodiment 2

[0052] 15.0 g of white balls (provided by Shaanxi Lanshen Special Resin Co., Ltd.) were crushed into a powder with a particle size of 130 mesh, fully expanded with sufficient amount of chloroform, and then free chloroform was filtered off.

[0053] Knead 100.0 g of lithium extraction adsorbent active body powder (provided by Shaanxi Lanshen Special Resin Co., Ltd.), 10.0 g of polyvinyl chloride, expanded white ball powder, and 150.0 g of chloroform evenly. Extrude, crush, and sieve, collect all particles with a particle size in the range of 0.8-1.2mm, and dry at 70°C for 4 hours as a semi-finished product. The semi-finished product was washed with 0.5 mol / L dilute hydrochloric acid, and then washed with pure water until neutral, and the free water was removed by suction filtration to obtain the finished product 2.

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Abstract

The invention discloses a lithium extraction adsorbent for raw brine and a preparation method thereof. The preparation method comprises the following steps: crushing cross-linked polystyrene resin, soaking the crushed cross-linked polystyrene resin in a sufficient amount of a solvent, fully expanding the soaked cross-linked polystyrene resin, and filtering out a free solvent to obtain white ball powder; uniformly kneading the lithium extraction adsorbent active body powder, an adhesive, white ball powder and a solvent according to a mass ratio of 1: (0.1-0.5): (0-0.3): (0.5-2.5) to obtain a mixture; carrying out strip extrusion, crushing, screening and drying treatment on the obtained mixture to obtain a semi-finished product; and washing the semi-finished product with dilute acid, washingwith water to be neutral, and performing suction filtration to remove free moisture, thereby obtaining the lithium extraction adsorbent for raw brine. Solid waste in the resin production process is used as a pore-forming agent to prepare the lithium extraction adsorbent with rich pore passage structures for raw brine.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a lithium extraction adsorbent for raw halogen and a preparation method thereof. Background technique [0002] Lithium is the metal with the smallest density in nature. Its unique physical and chemical properties such as high specific heat, high electrical conductivity and strong chemical activity make it widely used in lithium batteries, aluminum-lithium alloys, nuclear energy and other fields, especially With the rapid development of portable electronic devices and electric vehicles, the value of lithium has become increasingly prominent, and it has been called "the upstart of energy in the 21st century". Salt lake lithium resources account for 70% to 80% of the global lithium resource reserves. my country is rich in lithium-containing salt lake resources, and the salt lakes with high magnesium-lithium ratio are the main ones. The use of low-cost adsorption me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30
CPCB01J20/261B01J20/00B01J2220/4812
Inventor 冯志军梅昂张运张仁珊孙冰杰
Owner XIAN LANSHEN NEW MATERIAL TECHNOLOGY CO LTD
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