Technique for separating high purity yttrium oxide through solvent extraction

An yttrium oxide and extraction technology is applied in the process field of solvent extraction and separation of high-purity yttrium oxide, which can solve the problems of reduced concentration of extractant and fast loss of organic extractant, and achieves improved processing capacity, low reagent consumption and simple equipment. Effect

Inactive Publication Date: 2005-01-12
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention is aimed at the HAB-ROH dual-solvent extraction system which is currently being practiced in production. During long-term storage or actual production and recycling, HA and alcohol additives undergo degradation or esterification reactions, the concentration of the extractant decreases, and the loss of the organic extractant is fast. Problem, choose tributyl phosphate instead of ROH as an additive to improve the physical phenomena of the HAB system and increase the extraction capacity to form a HAB-TBP dual-solvent extraction system

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0008] The extractant selects sec-octylphenoxy substituted acetic acid HA+2-ethylhexylphosphonic acid mono-2-ethylhexyl ester HB to form the HAB system, adding V / V 20% tributyl phosphate to form 0.67MHA-0.08MHB- 15% tributyl phosphate-kerosene extraction system; ammonia water saponification, the saponification rate is 90%; rare earth chloride is the feed liquid, the feed liquid concentration is 1.0mol / L, Ywt% in the feed liquid accounts for 98%, pH2-4; The acid is hydrochloric acid; the flow ratio of organic phase: feed liquid: washing acid is 10:1:2.2; the number of stages in the extraction section is 37; the number of stages in the washing section is 4; the mixing time of fractional distillation and extraction is 8 minutes; Minutes; separation and enrichment are carried out in a separatory funnel at room temperature to prepare high-purity yttrium oxide; the outlet water phase is precipitated by oxalic acid and burned to form Y 2 o 3 Product, the obtained product is measured...

Embodiment 2

[0012] Experimental condition is the same as embodiment 1, only change feed liquid, pickling acid into nitric acid system, gained product Y 2 o 3 99.99% pure.

Embodiment 3

[0014] Extractant 1.0M sec-octylphenoxy substituted acetic acid HA-15% tributyl phosphate-kerosene system, ammonia water saponification 90%, other conditions are the same as in Example 1. The result is Y 2 o 3 The purity is 99.99%, and the yield is 91%. High purity Y 2 o 3 The rare earth impurity content analysis in the medium is as follows:

[0015] La 2 o 3

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PUM

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Abstract

This invention relates to a technology for extracting and separating pure Y oxide applying HAB as the extractant, TBP as the additive, among which, HAB is composed of HA+HB, HA is secondary hepayl phenoxy instead of acetic acid, secondary octyl phenoxy instead of acetic acid etc. HB is a salt base phosphoric acid P204, P507, Cyanax 272, Cyanex 302.

Description

technical field [0001] The invention belongs to the process of solvent extraction and separation of high-purity yttrium oxide. Background technique [0002] Chinese patent 99118261.8 discloses the technology titled "Liquid-liquid extraction and separation of high-purity yttrium oxide process" by Li Deqian. The technology uses HAB dual-solvent extractant. HAB consists of HA and HB. Monobasic phosphorus (phosphonic) acid, ROH is an additive of HAB, R is a C5-C10 alkyl group, and alkane or aromatic is used as a diluent to form a HAB-ROH-alkane or aromatic extractant system. The HAB-ROH production system has the advantages of large separation coefficient, high extraction capacity, low requirements for feed liquid, simple equipment, continuous production, large processing capacity, easy operation, and low reagent consumption. However, during long-term storage or actual production and operation, ROH and HA undergo degradation or esterification reactions, resulting in changes in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/38
CPCY02P10/20
Inventor 李德谦王香兰孟淑兰白彦
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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