Method for extracting rare earth from emulsion liquid membrane

An emulsion liquid membrane, rare earth technology, applied in the direction of improving process efficiency, can solve the problems of increasing the pH value adjustment operation process, reducing extraction efficiency, increasing production cost, etc., achieving good extraction effect, improved extraction efficiency, and less raw material consumption. Effect

Inactive Publication Date: 2016-01-06
GUIZHOU UNIV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Xie Zinan et al. used P204 and P507 as mobile carriers, T154 as surfactant, 6mol / L hydrochloric acid as internal phase resolver, sulfonated kerosene as membrane solvent, and oil-to-internal ratio of 1:1 to prepare emulsified liquid membrane for phosphate rock leaching solution. For the extraction of low-concentration rare earth elements, for a solution with a pH of 1 and a concentration of 100mg / L, the ratio of milk to water is 1:10, and the extraction rate can reach a maximum of 79.93%. However, as the acidity increases, the extraction efficiency decreases a lot. =0.2, the extraction rate is only 54.71%
In summary, it can be seen that P204 and P507 are used as mobile carriers to prepare liquid films in strong acidic media, which cannot efficiently extract rare earth elements. Therefore, before extraction, it is necessary to reduce the acidity of the phosphate rock leachate with high acidity, and increase the operation of adjusting the pH value. process, which increases production costs

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment （ 1

[0019] For the hydrochloric acid leach solution extraction of phosphate rock, the rare earth concentration of the phosphate rock leach solution is 0.328g / L. The volume fraction of aniline in the oil phase is 6%, the volume fraction of T154 is 4%, the sulfonated kerosene is 90%, the 6mol / L HCl solution is the internal phase desorbent, and the oil phase and the internal phase desorbent are mixed according to the volume ratio of 1:1 , stirring at high speed for 20 minutes. The emulsion film and phosphate rock leachate were mixed at a volume ratio of 1:10, and extracted by slow stirring for 20 minutes. The extraction efficiency was measured by GB / T6730.24-2006 extraction and separation-azochlorophosphine mA spectrophotometry to reach 92.49%.

Embodiment （ 2

[0021] For the hydrochloric acid leach solution extraction of phosphate rock, the rare earth concentration of the phosphate rock leach solution is 0.328g / L. The volume fraction of aniline in the oil phase is 4%, the volume fraction of T154 is 4%, the sulfonated kerosene is 92%, and the 6mol / L HCl solution is the internal phase desorbent, and the oil phase and the internal phase desorbent are mixed according to the volume ratio of 1:1 , stirring at high speed for 20 minutes. The emulsion film and phosphate rock leaching solution were mixed according to the volume ratio of 1:10, and extracted with slow speed for 20 minutes, and the extraction efficiency was measured by GB / T6730.24-2006 extraction and separation-azochlorophosphine mA spectrophotometry to reach 91.07%.

Embodiment （ 3

[0023] For the hydrochloric acid leach solution extraction of phosphate rock, the rare earth concentration of the phosphate rock leach solution is 0.328g / L. The volume fraction of aniline in the oil phase is 6%, the volume fraction of T154 is 6%, sulfonated kerosene is 88%, the 6mol / L HCl solution is the internal phase desorbent, and the oil phase and the internal phase desorbent are mixed according to the volume ratio of 1:1 , stirring at high speed for 20 minutes. The emulsion liquid film and phosphate rock leaching solution were mixed according to the volume ratio of 1:10, and extracted with slow speed for 20 minutes. The extraction efficiency was measured by GB / T6730.24-2006 extraction and separation-azochlorophosphine mA spectrophotometry to reach 90.47%.

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 belongs to the field of rare earth metallurgy and provides a method for extracting rare earth from strong-acid leachate of phosphates containing rare earth. The method is characterized by comprising the following steps of stirring oil phases and an internal-phase resolving agent, namely an HCl solution with the concentration of 2-12mol / L, according to the volume ratio of 1:1 to prepare an emulsion at a high speed, wherein the oil phases include 4-14% (volume fraction, the same below) of a mobile carrier, namely phenylamine, 2-12% of a surfactant T154 and a film solvent, namely sulfonated kerosene; stirring at a low speed, and extracting rare earth in leachate, wherein the volume ratio of the emulsion to external-water-phase leachate is 1:10 to 1:100, and the highest extracting efficiency of the extracting system to rare earth in phosphate leachate can be up to more than 92%.

Description

technical field [0001] The invention belongs to the field of rare-earth metallurgy and provides a method for extracting rare-earth from the strongly acidic leaching solution of phosphate rock containing rare-earth. Background technique [0002] Most of the rare earth resources in my country come from low-grade rare earth mines. At present, the ore is mainly treated by leaching with electrolyte solution, and oxalic acid or ammonium bicarbonate is used to precipitate rare earths for leachate treatment, and the separation and extraction effect is poor. At present, there is still a considerable gap between my country and foreign advanced countries in the research fields of deep processing of rare earths and development of new materials. In order to efficiently extract rare earth elements, it is necessary to seek a low-cost and high-efficiency separation technology. The high-efficiency selectivity, high orientation, and great permeability of liquid membrane separation technology...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/28C22B59/00
CPCY02P10/20
Inventor 陈前林张利昌
Owner GUIZHOU UNIV
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