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Method for extracting scandium from scandium-containing iron-rich acid liquor through P507

An iron-rich and acid solution technology, applied in the field of scandium extraction, can solve the problems of difficult scandium extraction and high extraction rate, and achieve the effects of low cost, high yield and high recovery rate of scandium

Inactive Publication Date: 2013-07-24
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is to overcome the defects of the prior art, and provide a method for extracting scandium from scandium-containing ferric acid solution with P507, so as to solve the problem of difficulty in extracting scandium under the condition of high acidity in the current industry. The inventive method has high extraction rate of scandium, low cost, simple and practical process conditions, and can fully realize industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) The scandium content in the scandium-containing ferric acid solution is 18mg / L, the iron content is 19.6g / L, and the H + The concentration is 3.2mol / L, and the N235 organic phase with a composition of N235: isooctyl alcohol: kerosene = 25:5:70 is used to extract and remove iron. After liquid separation, an aqueous phase containing scandium and an organic phase containing iron are obtained, and the iron removal rate is 99.4 %;

[0025] (2) Back-extract the iron-containing organic phase with water, the volume ratio is O / W=1:1, back-extract twice, filter the water phase to obtain iron hydroxide precipitation, and recycle the organic phase.

[0026] (3) The scandium-containing aqueous phase is extracted with the P507 organic phase, and the weight composition of the extracted organic phase is controlled to be P507:kerosene=25:75, and the scandium-containing organic phase and the acid-containing aqueous phase are obtained after liquid separation;

[0027] (4) Back-extrac...

Embodiment 2

[0030] (1) The scandium content in the scandium-containing ferric acid solution is 28mg / L, the iron content is 44.2g / L, and the H + The concentration is 2.7mol / L, and the N235 organic phase extraction and iron removal with a weight composition of N235: isooctyl alcohol: kerosene = 28:5:67, after liquid separation, a scandium-containing aqueous phase and an iron-containing organic phase are obtained, and the iron removal rate is 99.6%;

[0031] (2) Back-extract the iron-containing organic phase with water, the volume ratio is O / W=1:1, back-extract twice, and filter the water phase to obtain iron hydroxide precipitation; the organic phase is recycled.

[0032] (3) The scandium-containing aqueous phase is extracted with the P507 organic phase, and the weight composition of the extracted organic phase is controlled to be P507:kerosene=23:77, and the scandium-containing organic phase and the acid-containing aqueous phase are obtained after liquid separation;

[0033] (4) Back-extr...

Embodiment 3

[0036] (1) The scandium content in the scandium-containing ferric acid solution is 26mg / L, the iron content is 35.2g / L, and the H + Concentration is 4.3mol / L, use weight composition to be N235: Isooctyl alcohol: kerosene=24:1:75 N235 organic phase extracts and removes iron, obtains scandium-containing aqueous phase and iron-containing organic phase after liquid separation, and iron removal rate is 99.2%;

[0037] (2) Back-extract the iron-containing organic phase with water, the volume ratio is O / W=1:1, back-extract twice, and filter the water phase to obtain iron hydroxide precipitation; the organic phase is recycled.

[0038] (3) The scandium-containing aqueous phase is extracted with the P507 organic phase, and the weight composition of the extracted organic phase is controlled to be P507:kerosene=22:78, and the scandium-containing organic phase and the acid-containing aqueous phase are obtained after liquid separation;

[0039] (4) Back-extract the scandium-containing org...

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Abstract

The invention discloses a method for extracting scandium from scandium-containing iron-rich acid liquor through P507. The method comprises a step of extracting to remove iron and a step of extracting to gain scandium. The method specifically comprises the following steps of: firstly, extracting through an N235-containing organic phase to remove the iron from the scandium-containing iron-rich acid liquor, wherein the extraction rate is up to more than 99.5%, and the loss ratio of scandium is less than 0.5%; and secondly, extracting the scandium through a P507-contianing organic phase. According to the method, the scandium-containing iron-rich acid liquor contains 5 to 50mg / L of scandium based content, 5 to 45g / L of iron based on content, and 1 to 5.5mol / L of H<+> based on concentration; and the extracting rate of the scandium is up to 99%. The method disclosed by the invention is a novel method which is low in cost and high in scandium recovery rate, can meet the demand of industrial production, and has a wide prospect.

Description

[0001] technical field [0002] The invention relates to a method for extracting scandium from scandium-containing iron-rich ferric acid solution by using P507, which belongs to the technical field of hydrometallurgy. Background technique [0003] The abundance of scandium in the earth's crust is very low, about (5~6)×10 -4 %, the distribution is sparse, and it is a typical dispersed element. There are very few types of minerals that exist as independent minerals. [0004] In the industry, scandium is mainly recovered from the process of processing tungsten ore, uranium ore, tin ore, and ilmenite. In addition, in the rare earth industry, with the removal of other components in rare earth ore, the content of scandium in tailings will increase significantly. A large degree of enrichment, so rare earth tailings are good raw materials for scandium extraction. [0005] Scandium and its compounds have a variety of excellent properties. The addition of scandium has a good effect ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/28C22B3/38C22B59/00
CPCY02P10/20
Inventor 李梅陈燕飞胡德志张栋梁高凯柳召刚
Owner INNER MONGOLIA UNIV OF SCI & TECH
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