Floating extraction agent for strengthening floating extraction separation of lanthanum and cerium and method for selectively separating lanthanum and cerium

A selective and flotation technology, applied in the direction of lanthanum oxide/lanthanum hydroxide, cerium oxide/cerium hydroxide, process efficiency improvement, etc., to achieve the effect of strong hydrophobicity and relative stability, easy formation and easy dissociation

Active Publication Date: 2021-04-16
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problem that the existing solvent extraction technology is difficult to realize the selective depth separation of similar rare earth elements lanthanum and cerium, the first purpose of the present invention is to provide a floating extraction reagent that can realize the high selective separation of similar rare earth elements lanthanum and cerium , the composition of the floating extraction agent is simple, it has strong coordination and capture ability for rare earth metal cerium ions in low concentration solution system, high selectivity, good floating extraction separation effect, can realize deep separation of lanthanum and cerium, and has good industrial application prospect

Method used

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  • Floating extraction agent for strengthening floating extraction separation of lanthanum and cerium and method for selectively separating lanthanum and cerium

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Embodiment 1

[0031] The invention discloses a method for selectively separating lanthanum and cerium with a floating extraction agent, which is composed of the following parts by mass: 20 parts by mass of sodium lauryl sulfate; and 80 parts by mass of P204. The floating extraction process is as follows:

[0032] (1) To 500mL La 3+ The concentration is 0.1mol / L, Ce 3+ In the solution with a concentration of 0.02 mol / L, a 6 mol / L HCl pH regulator was added to adjust the pH of the solution to 2. Then add 1.5 times the theoretical amount of cerium floating extraction agent, and stir at 600r / min for 30min. Ce 3+ Form a hydrophobic complex with the floating extraction agent P204 and combine with sodium dodecyl sulfate to become a drug-ion micro-droplet with stronger hydrophobicity.

[0033](2) Move the above-mentioned mixed solution into the flotation column, ventilate and adjust the gas velocity to be 50ml / min, add 20ml organic solvent in the upper layer of the solution, and the organic pha...

Embodiment 2

[0038] The invention discloses a method for selectively separating lanthanum and cerium with a floating extraction agent, which is composed of the following parts by mass: 30 parts by mass of sodium dodecylsulfonate; 70 parts by mass of P507. The floating extraction process is as follows:

[0039] (1) To 500mL La 3+ The concentration is 0.05mol / L, Ce 3+ In the solution with a concentration of 0.01 mol / L, 6 mol / L of HCl pH regulator was added to adjust the pH of the solution to 2.5. Then add 1.5 times the theoretical amount of cerium floating extraction agent, and stir at 600r / min for 30min. Ce 3+ Form a hydrophobic complex with the floating extraction agent P507 and combine with sodium dodecylsulfonate to become a drug-ion micro-droplet with stronger hydrophobicity.

[0040] (2) Move the above-mentioned mixed solution into the flotation column, ventilate and adjust the gas velocity to be 50ml / min, add 20ml organic solvent in the upper layer of the solution, and the organic...

Embodiment 3

[0045] The invention discloses a method for selectively separating lanthanum and cerium with a floating extraction reagent, which is composed of the following parts by mass: 40 parts by mass of sodium octadecyl sulfate; 60 parts by mass of P204. The floating extraction process is as follows:

[0046] (1) To 500mL La 3+ The concentration is 0.08mol / L, Ce 3+ In the solution with a concentration of 0.01 mol / L, 6 mol / L of HCl pH adjuster was added to adjust the pH of the solution to 3. Then add 1.8 times the theoretical amount of cerium floating extraction agent, and stir at 600r / min for 30min. Ce 3+ Form a hydrophobic complex with the floating extraction agent P204 and combine with sodium octadecyl sulfate to become a drug-ion micro-droplet with stronger hydrophobicity.

[0047] (2) Move the above-mentioned mixed solution into the flotation column, ventilate and adjust the gas velocity to be 50ml / min, add 20ml organic solvent in the upper layer of the solution, and the organi...

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Abstract

The invention discloses a floating extraction agent for strengthening floating extraction separation of lanthanum and cerium and a method for selectively separating lanthanum and cerium. The floating extraction agent comprises long-chain alkyl sulfonate (sulfate) and an organophosphate compound. The method for selectively separating lanthanum and cerium by using the floating extraction agent comprises the following steps that a solution containing lanthanum ions and cerium ions is reacted with the floating extraction agent to selectively convert the cerium ions into a floating extraction agent-cerium ion hydrophobic complex to obtain a reaction mixed solution; floating extraction is carried out on the reaction mixed solution to obtain an organic phase loaded with the cerium ions, and the lanthanum ions are enriched in the reaction mixed solution; and reverse extraction is carried out on the organic phase loaded with the cerium ions through a reverse extraction agent to obtain a cerium ion enriched solution. The method for selectively separating lanthanum and cerium is simple to operate, low in floating extraction agent cost and high in separation efficiency of similar rare earth metal lanthanum and cerium ions, is particularly suitable for deep separation of lanthanum and cerium in a low-concentration system, and has a relatively high industrial application prospect.

Description

technical field [0001] The present invention relates to a kind of flotation agent used for the separation of similar rare earth element lanthanum and cerium, in particular to a kind of flotation agent used to strengthen the separation of lanthanum and cerium flotation depth, and also to realize the selectivity of lanthanum and cerium based on the flotation agent The separation method belongs to the technical field of rare earth metal separation. Background technique [0002] Because of their unique optical, electrical, and magnetic properties, rare earths are known as the treasure house of high-tech and functional materials in the new century. They are widely used in various fields such as integrated circuits, national defense, aerospace, and national economy. They are strategic resources related to national security. and high-tech materials. my country's rare earth metal reserves are relatively rich, but the chemical properties of rare earth metals are similar and their ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/40C22B59/00C01F17/229C01F17/235
CPCY02P10/20
Inventor 韩桂洪黄艳芳刘兵兵苏胜鹏王益壮薛毓斌王静雯
Owner ZHENGZHOU UNIV
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