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Method for recovering and separating lanthanum, neodymium and ytterbium from dicranopteris pedata

A technology for hyper-enrichment of plants and rare earths, applied in the field of neodymium, recovery and separation of lanthanum and ytterbium, which can solve the problems of inability to separate different types of rare earth elements, secondary pollution, etc.

Active Publication Date: 2021-10-29
SUN YAT SEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defects and deficiencies of existing rare earth hyperaccumulation plants that cannot separate different types of rare earth elements and easily cause secondary pollution, and provide a green, safe, high-efficiency, no secondary pollution, which can be separated Method for rare earth hyperaccumulation of different kinds of rare earth elements in plants

Method used

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  • Method for recovering and separating lanthanum, neodymium and ytterbium from dicranopteris pedata
  • Method for recovering and separating lanthanum, neodymium and ytterbium from dicranopteris pedata

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Experimental program
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Effect test

Embodiment 1

[0032] Embodiment 1 A kind of method that reclaims and separates lanthanum, neodymium, ytterbium from Osmanthus osmanthus

[0033] S1. In a rare earth tailings sand field in Ganzhou, Jiangxi, plant the super-enrichment plant Osmanthus osmanthus, collect the mature leaves and necrotic leaves of Osmanthus per hectare during the growth process, and dry them. The dried plants are placed in a shearing machine. Broken in the crusher to obtain uniform Osmanthus leaf powder;

[0034] S2, get 10g of Osmanthus fragrans leaf powder obtained in step S1 and carry out microwave digestion, adopt ICP-MS to measure the content of lanthanum, neodymium, and ytterbium element in the blade, obtain lanthanum, neodymium content and be respectively 2233ug / L, 1072ug / L, according to The total amount of lanthanum and neodymium contained in Osmunda: the molar ratio of lanthanum oxide is 1:2, add lanthanum oxide powder with a particle size of 20um to the remaining Osmanthus frondosa leaf powder, shake and...

Embodiment 2

[0039] Embodiment 2 A kind of method of reclaiming and separating lanthanum, neodymium, ytterbium from Pokeweed

[0040] S1. Plant the super-accumulator pokeweed plant in a rare earth tailings sand field in Ganzhou, Jiangxi, collect the mature leaves and necrotic leaves of pokeweed per hectare during the growth process, and dry them. The dried plants are placed in shears. Crushing in a cutter crusher to obtain uniform pokeweed leaf powder;

[0041] S2, get 10g of Pokeweed leaf powder obtained in step S1 and carry out microwave digestion, adopt ICP-MS to measure the lanthanum, neodymium, and ytterbium element content in the leaf, obtain lanthanum, neodymium content and be respectively 2085ug / L, 1264ug / L, According to the total amount of lanthanum and neodymium contained in pokeweed: the molar ratio of lanthanum oxide is 1:2, add lanthanum oxide powder with a particle size of 20um to the remaining pokeweed leaf powder, oscillate and mix evenly, and obtain a mixed powder;

[004...

Embodiment 3

[0045] Embodiment 3 A kind of method that reclaims and separates lanthanum, neodymium, ytterbium from crescent fern

[0046] S1. Plant the super-accumulative plant Crescent fern in a rare earth tailings sandy land in Ganzhou, Jiangxi, collect the mature leaves and necrotic leaves of Crescent fern per hectare during the growth process, and dry them. The plant is placed in a shear crusher and crushed to obtain uniform crescent fern leaf powder;

[0047] S2, get step S1 gained crescent fern blade powder 10g and carry out microwave digestion, adopt ICP-MS to measure the lanthanum, neodymium, ytterbium element content in the blade, obtain lanthanum, neodymium content and be respectively 1854ug / L, 976ug / L According to the total amount of lanthanum and neodymium contained in Crescent fern: the molar ratio of lanthanum oxide is 1:2, add lanthanum oxide powder with a particle size of 20um to the remaining Crescent fern leaf powder, shake and mix evenly, and obtain a mixed powder;

[...

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Abstract

The invention belongs to the technical field of solid waste recycling, and particularly relates to a method for recycling and separating lanthanum, neodymium and ytterbium from a rare earth hyperaccumulation plant. According to the method, lanthanum and neodymium in the hyperaccumulation plant are extracted and separated in the form of oxides by utilizing a phase diffusion principle of rare earth oxides under a high-temperature condition and a separation theory of metals and nonmetals, and an ytterbium-rich biochar raw material is produced, so that the aims of separating and recycling rare earth metals in the hyperaccumulator are fulfilled, high-value recycling is realized, the whole process is green and efficient, and the method has high application value in the field of rare earth hyperaccumulation plant recycling.

Description

technical field [0001] The invention belongs to the technical field of solid waste recycling. More specifically, it relates to a method for recovering and separating lanthanum, neodymium, and ytterbium from rare earth hyperaccumulator plants. Background technique [0002] Rare earth elements have excellent magnetic, optical, and electrical properties. They can be used not only in traditional fields such as glass, metallurgy, ceramics, and petrochemicals, but also in new materials such as permanent magnet materials, hydrogen storage materials, catalysts, and high-temperature superconductors. They are of great importance. strategic significance. [0003] In order to improve the ecological environment while reclaiming rare earth elements, the prior art has developed a phytoremediation technology for planting rare earth hyperaccumulation plants on rare earth polluted soil to enrich rare earth elements in the soil. However, in practical applications, there are still difficultie...

Claims

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Application Information

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IPC IPC(8): C01B32/05C01F17/241C01F17/10C22B59/00C22B7/00
CPCC01B32/05C01F17/241C01F17/10C22B59/00C22B7/001C01P2004/03Y02P10/20
Inventor 汤叶涛冯汉栩曹健黄哲阮菊俊刘文深单永能杨萍萍刘田杰徐玉仪仇荣亮
Owner SUN YAT SEN UNIV
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