Lithium ion adsorption column and preparation method thereof

A lithium ion, adsorption column technology, applied in separation methods, chemical instruments and methods, solid adsorbent liquid separation, etc., can solve problems such as poor fluidity and permeability, increased resistance of fixed bed, and difficulty in industrialization of lithium extraction. To achieve the effect of stable flow, fast adsorption rate and constant resistance

Inactive Publication Date: 2017-12-08
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The currently synthesized single lithium-ion special-effect adsorbent is in the powder state, while the composite adsorbent made of organic polymer is in the state of small particles; in the adsorption-desorption process of packing into a fixed bed layer, the particle size of the former is small and the flow The latter is prone to pulverization under the circulation of brine and eluent, and the resistance of the fixed bed layer increases, which brings difficulties to the industrialization of lithium extraction.

Method used

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  • Lithium ion adsorption column and preparation method thereof
  • Lithium ion adsorption column and preparation method thereof
  • Lithium ion adsorption column and preparation method thereof

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Embodiment 1

[0027] refer to figure 1 , the lithium ion adsorption column of this embodiment includes a column formed by entanglement of thermoplastic polymer fibers, and a lithium ion adsorbent is bonded in the column; wherein, the lithium ion adsorbent consists of a lithium ion adsorption precursor Obtained after elution of lithium ions.

[0028] Preferably, a grid frame is also installed on the column to increase the structural strength and pressure resistance of the column. The structure diagram of the obtained lithium ion adsorption column is as follows figure 1 As shown, wherein, 1 is a lithium ion adsorption column, and 2 is a grid frame.

[0029] This kind of lithium ion adsorption column uses thermoplastic polymer fibers to form a column, which not only makes the column have a huge specific surface area, increases the interaction area between the adsorbent and brine on the column, and improves the adsorption efficiency; It can be shaped in any shape or size, which is convenient ...

Embodiment 2

[0045] In the description of Embodiment 2, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 2 and embodiment 1 is that in step 110, polytetrafluoroethylene is melted at 400°C to form polytetrafluoroethylene fibers; in step 120, Li 2 Ti 3 o 7 As a lithium ion adsorption precursor, while spraying Li uniformly on the surface of PTFE fibers 2 Ti 3 o 7 Powder, while pulling the PTFE fiber, using the viscosity of the PTFE fiber itself in the hotter state to adsorb lithium ions on the precursor Li 2 Ti 3 o 7 bonding. As the traction continues, the polytetrafluoroethylene fibers are gradually entangled to form a column, and the lithium ion adsorbs the precursor Li 2 Ti 3 o 7 It is also bonded in the column; among them, Li 2 Ti 3 o 7 The mass ratio with polytetrafluoroethylene is 0.75:1; In step 130, on the "inner wall" and "outer wall" of the cylinder, the stainles...

Embodiment 3

[0048] In the description of Embodiment 3, the similarities with Embodiment 1 will not be repeated here, and only the differences with Embodiment 1 will be described. The difference between embodiment 3 and embodiment 1 is that in step 110, polyethylene is melted at 160°C to form polyethylene fibers; in step 120, Li 1.6 mn 1.6 o 4 As a lithium ion adsorption precursor, while spraying Li evenly on the surface of polyethylene fibers 1.6 mn 1.6 o 4 powder, while pulling the polyethylene fiber, using the viscosity of the polyethylene fiber itself in a relatively hot state to adsorb lithium ions to the precursor Li 1.6 mn 1.6 o 4 bonding. As the traction continues, the polyethylene fibers are gradually entangled to form a column, and the lithium ion adsorbs the precursor Li 1.6 mn 1.6 o 4 It is also bonded in the column; among them, Li 1.6 mn 1.6 o 4 The mass ratio with polyethylene is 1:1; In step 130, on the "inner wall" and "outer wall" of the cylinder, the stainles...

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Abstract

The invention discloses a lithium-ion adsorption column. The lithium-ion adsorption column comprises a hollow column body formed by entanglement of thermoplastic polymer fibers, wherein a lithium-ion adsorbent is bonded to the column body, and the lithium-ion adsorbent is obtained after lithium-ions are eluted from a lithium-ion adsorption precursor. The invention further discloses a method for preparing the lithium-ion adsorption column. The method comprises the steps of A, heating and melting a thermoplastic polymer, and conducting spinning to form the thermoplastic polymer fibers; B, drawing the thermoplastic polymer fibers, spraying the lithium-ion adsorption precursor on the surfaces of the thermoplastic polymer fibers, and entangling the thermoplastic polymer fibers to form a lithium-ion adsorption precursor column which is of a hollow columnar structure; C, conducting cooling, lithium-ion elution, washing and drying on the lithium-ion adsorption precursor column to obtain the lithium-ion adsorption column. The method is simple, and the lithium-ion adsorption column has the advantages of being high in adsorbing capacity, high in adsorbing rate and the like in use.

Description

technical field [0001] The invention belongs to the technical field of lithium ion separation equipment, and in particular relates to a lithium ion adsorption column and a preparation method thereof. Background technique [0002] Lithium metal has strong chemical activity, and its single substance or compound is widely used in metallurgy, ceramics, battery materials, nuclear industry, aerospace and other fields due to its unique advantages. In the national economy and national defense construction, lithium is a strategic resource of great significance. [0003] Lithium exists in nature in two forms: solid and liquid. Solid lithium deposits are mainly pegmatite deposits such as spodumene and lepidolite; liquid lithium deposits mainly exist in salt lake brine, seawater, geothermal water and oilfield water in the form of lithium ions. From the perspective of global development and production, 80% of lithium products come from liquid lithium resources, and lithium extraction f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/24C22B26/12B01D15/10
CPCY02P10/20
Inventor 张全有李杰贾永忠张丽芬孙进贺景燕谢绍雷姚颖
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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