New method of using novel extracting agent to extract scandium oxide from titanium dioxide waste acid

A technology of titanium dioxide waste acid and extraction agent, which is applied in the preparation/processing of scandium oxide/hydroxide, rare earth metal oxide/hydroxide, rare earth metal compound, etc., can solve the economic loss of low recovery rate and waste of resources , extracting scandium oxide with low purity, etc., to achieve the effect of high recovery rate, good effect and low price

Inactive Publication Date: 2020-12-18
HUNAN CHUANGDA YUTU CHEM CO LTD
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  • Application Information

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Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a new method for extracting scandium oxide from titanium white waste acid with a new type of extractant, mainly to solve the prob

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  • New method of using novel extracting agent to extract scandium oxide from titanium dioxide waste acid

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Embodiment 1

[0033] A new method for proposing scandium oxide from titanium white waste acid by a new type of extractant, comprising the following steps:

[0034] S1 Prepare raw materials: titanium white waste acid water raw materials, concentrated sulfuric acid raw materials;

[0035] S2 sulfuric acid dissolution: add water and concentrated sulfuric acid solution to the titanium white waste acid water and stir and mix;

[0036] S3 Precipitation: add flocculant to the mixed solution, the cost of the flocculant is low, carry out precipitation, and filter the solution after precipitation;

[0037] S4 washing: add water, sulfuric acid and hydrogen peroxide to the filtered solution and mix and stir. The mixture of sulfuric acid and hydrogen peroxide reacts with titanium in the scandium-titanium organic phase more efficiently, and achieves the purpose of separating scandium;

[0038] S5 extraction: add dioctyl phosphate and tributyl phosphate to the washed mixed solution for extraction, diocty...

Embodiment 2

[0047] S1 Prepare raw materials: titanium white waste acid water raw materials, concentrated sulfuric acid raw materials;

[0048] S2 sulfuric acid dissolution: add water and concentrated sulfuric acid solution to the titanium white waste acid water and stir and mix;

[0049] S3 Precipitation: add flocculant to the mixed solution, the cost of the flocculant is low, carry out precipitation, and filter the solution after precipitation;

[0050] S4 washing: add water, sulfuric acid and hydrogen peroxide to the filtered solution and mix and stir. The mixture of sulfuric acid and hydrogen peroxide reacts with titanium in the scandium-titanium organic phase more efficiently, and achieves the purpose of separating scandium;

[0051] S5 extraction: add dioctyl phosphate and tributyl phosphate to the washed mixed solution for extraction, dioctyl phosphate and tributyl phosphate can further purify scandium oxide;

[0052] S6 stripping: add sodium hydroxide to the mixed extract, heat it...

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Abstract

The invention discloses a novel method of using a novel extracting agent to extract scandium oxide from titanium dioxide waste acid. The method comprises the following steps of: S1, preparation of rawmaterials: preparing a titanium dioxide waste acid water raw material and a concentrated sulfuric acid raw material; S2, sulfuric acid dissolution: adding water and a concentrated sulfuric acid solution into titanium dioxide waste acid water, stirring and mixing; S3, precipitation: adding a flocculating agent into the mixed solution, performing precipitation, and filtering the after-precipitationsolution; and S4, washing: adding water, sulfuric acid and hydrogen peroxide into the filtered solution, mixing and stirring, adding hydrogen peroxide, and continuously stirring. According to the method, a new extraction method is carried out by adopting dioctyl phosphate and tributyl phosphate to replace a traditional old extracting agent; during extraction, the separation effect is better, therecovery rate is high, the scandium oxide can be further purified, the extraction rate is increased from about 60% to 85%, and the price of the dioctyl phosphate and the tributyl phosphate is low; andfurthermore, the added flocculating agent is cheap and practical, and the flocculating agent is non-toxic and high in flocculating capacity.

Description

technical field [0001] The invention specifically relates to the technical field of the chemical industry, in particular to a new method for extracting scandium oxide from titanium white waste acid with a novel extractant. Background technique [0002] Scandium is an important rare earth element. The good application and scarcity of its oxides and alloys in the fields of aerospace, electric light source and clean energy have attracted more and more attention. At present, scandium resources mainly exist in waste titanium dioxide. In the acid, the process of domestic production of high-purity scandium oxide is mainly divided into two steps. First, the traditional extraction and alkali stripping process is used to enrich scandium oxide from the waste acid of sulfuric acid process titanium dioxide and scandium-containing materials to form scandium-containing alkali cakes. Then adopt multiple inorganic precipitation separation and impurity removal processes of acid dissolution, h...

Claims

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Application Information

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IPC IPC(8): C22B59/00C22B7/00C01F17/10C01F17/212
CPCC22B7/007C22B59/00C01F17/10C01F17/212Y02P10/20
Inventor 张琴
Owner HUNAN CHUANGDA YUTU CHEM CO LTD
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