Lithium ion sieve membrane and preparation method thereof

A lithium ion and sieve membrane technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve the problems of difficulty in industrial application, cumbersome process, poor particle fluidity and permeability, etc. Achieve the effect of good application prospect, convenient use and simple preparation process

Inactive Publication Date: 2011-10-12
OCEAN UNIV OF CHINA
View PDF0 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the synthesized lithium ion sieve is mostly in powder state, the particles are small, and the fluidity and permeability of the particles are poor, it is not suitable for column operation, and it is mostly used for static...

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lithium ion sieve membrane and preparation method thereof
  • Lithium ion sieve membrane and preparation method thereof
  • Lithium ion sieve membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Dissolve a certain amount of PVDF in DMAc to make a casting solution with a mass percentage of 16%, and then add Li 1.6 mn 1.6 o 4 , After mixing, heat and stir at 60°C. Then ultrasonic for a period of time to make the precursor 1.6 mn 1.6 o 4 Fully disperse in the casting solution, let it stand for one day at room temperature to make it mature and defoam completely, scrape a layer of liquid film with a thickness of 0.2 mm on a clean glass plate, and immerse the liquid film together with the glass plate in a coagulation bath (distilled water), The film cures and peels off the glass plate automatically.

[0019] The prepared film was placed in 0.5mol / L HCl for 12 hours, and the precursor Li 1.6 mn 1.6 o 4 After the lithium ions are extracted, the lithium ion sieve membrane is obtained. Such as figure 1 As shown, the scanning electron micrographs showed that the Li-ion sieve was successfully incorporated into the membrane.

Embodiment 2

[0021] Place the lithium ion sieve membrane prepared in Example 1 in the LiCl / LiOH solution with a lithium ion concentration of 0.753 mg / L, take the last clear liquid every half an hour, and measure the Li before and after the solution with an atomic absorption spectrophotometer. + Concentration, according to the formula to calculate the adsorption capacity. The lithium ion sieve membrane has a relatively high adsorption capacity for lithium, and the adsorption rate is fast, and the adsorption equilibrium is reached in about 8 hours, and the adsorption capacity for lithium ions is as high as 27.45×10 2 mg / cm 2 ,Such as figure 2 shown.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a lithium ion sieve membrane and a preparation method thereof. The preparation method of the lithium ion sieve membrane is characterized by comprising the following steps of: dissolving polyvinylidene fluoride in N,N-dimethyl acetamide to prepare membrane casting liquid, and then adding lithium manganese oxide precursors; after mixing, heating and agitating; fully dispersing the lithium manganese oxide in the membrane casting liquid through ultrasound, standing, curing, fully defoaming, scraping a clean glass plate into a membrane, and immersing the membrane in a coagulation bath for coagulating; and finally acid-washing the made membrane, and extracting lithium ions in the precursors to obtain the lithium ion sieve membrane. The invention has the advantages of simple preparation process and convenience for use and has good application prospects in seawater lithium extraction.

Description

technical field [0001] The invention relates to an adsorbent and a preparation method thereof, in particular to a lithium ion sieve membrane and a preparation method thereof. Background technique [0002] Lithium and its salts are widely used in glass, ceramics, lubricants, refrigerants, metallurgy, pharmaceuticals, chemical reagents, lithium-ion batteries and energy due to their unique advantages. However, the content of lithium resources on land is about 1.7×10 7 tons, which is far from meeting the market's demand for lithium, and the reserves of lithium resources in seawater are huge, more than 15,000 times that of land, about 2.5×10 11 Ton. Therefore, extracting lithium from seawater has broad development prospects. [0003] Adsorbent method is considered to be the most promising method for extracting lithium from seawater with low lithium concentration and salt lake brine because of its good selectivity, high extraction rate and easy continuous operation. At presen...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01J20/06B01J20/04B01J20/28B01J20/30
Inventor 朱桂茹綦鹏飞王铎高从堦
Owner OCEAN UNIV OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap