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Method for preparing scandium oxide from chlorinated fumes

A technology of chlorinated fume and scandium oxide, applied in chemical instruments and methods, rare earth metal oxides/hydroxides, inorganic chemistry, etc., can solve the problem of low purity, low scandium recovery rate, low extraction rate, etc. problems, to achieve the effect of increasing market competitiveness, changing small output and high-purity industrialization

Inactive Publication Date: 2018-08-28
锦州海特新材料科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Aiming at the current technical problems such as heavy pollution, low extraction rate, low purity and low scandium recovery rate of the current acid leaching extraction method, the technical problem solved by the present invention is to provide an industrially produced green Method for preparing scandium oxide from chlorination fumes with environmental protection, high extraction rate and high scandium recovery rate

Method used

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  • Method for preparing scandium oxide from chlorinated fumes
  • Method for preparing scandium oxide from chlorinated fumes

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Step A: add hydrochloric acid solution and excess iron powder to the raw material of chlorination fume and leach for 1.5 hours, the mass ratio of chlorination fume, dilute hydrochloric acid and iron powder is 5:9:0.1, press filter to obtain filtrate;

[0038] Step B: Add the filtrate obtained in step A to an appropriate amount of P with a ratio of O / A=1 / 1.5 204 system extractant for extraction, static phase separation, and enriched Sc 3+ of the extract;

[0039] Step C: using hydrochloric acid solution to wash the extract obtained in step B, to the Sc-enriched 3+ Adding a sodium hydroxide solution with a concentration of 1 mol / L to the organic phase solution, carrying out stripping at 65°C to obtain a precipitate, filtering, drying, and calcining at a high temperature to obtain the crude scandium oxide of the first enrichment;

[0040] Step D: adding the crude product of scandium oxide in step C to a hydrochloric acid solution for dissolving, removing the filter resid...

Embodiment 2

[0044] Step A: add hydrochloric acid solution and excess iron powder to the raw material of chlorination fume and leach for 1 hour, the mass ratio of chlorination fume, dilute hydrochloric acid and iron powder is 5:12:0.2, press filter to obtain filtrate;

[0045] Step B: Add the filtrate obtained in step A to an appropriate amount of P that is O / A=1 / 2.5 204 system extractant for extraction, static phase separation, and enriched Sc 3+ of the extract;

[0046] Step C: using hydrochloric acid solution to wash the extract obtained in step B, to the Sc-enriched 3+ Adding a sodium hydroxide solution with a concentration of 2 mol / L to the organic phase solution, carrying out stripping at 85°C to obtain a precipitate, filtering, drying, and calcining at a high temperature to obtain the crude scandium oxide of the first enrichment;

[0047] Step D: adding the crude product of scandium oxide in step C to a hydrochloric acid solution for dissolving, removing the filter residue by suct...

Embodiment 3

[0051] Step A: add hydrochloric acid solution and excess iron powder to the raw material of chlorination fume and leach for 2 hours, the mass ratio of chlorination fume, dilute hydrochloric acid and iron powder is 5:10:0.15, press filter to obtain filtrate;

[0052] Step B: Add the filtrate obtained in step A to an appropriate amount of P with a ratio of O / A=1 / 3.5 204 system extractant for extraction, static phase separation, and enriched Sc 3+ of the extract;

[0053] Step C: using hydrochloric acid solution to wash the extract obtained in step B, to the Sc-enriched 3+ Adding a sodium hydroxide solution with a concentration of 2 mol / L to the organic phase solution, carrying out stripping at 85°C to obtain a precipitate, filtering, drying, and calcining at a high temperature to obtain the crude scandium oxide of the first enrichment;

[0054] Step D: adding the crude product of scandium oxide in step C to a hydrochloric acid solution for dissolving, removing the filter resid...

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Abstract

The invention discloses a method for preparing scandium oxide via chlorinated soot, comprising scandium oxide enrichment process and refining process; the scandium oxide enrichment process comprises: adding collected chlorinated soot material slowly into dilute hydrochloric acid, reacting for 1-2 h, adding iron powder, stirring for 15 min, press-filtering while the stirred material is hot to obtain filtrate, extracting the filtrate with an organic phase, carrying out phase separation, pickling the organic phase with dilute hydrochloric acid, and carrying out split-phase stripping precipitation to obtain primary enriched scandium oxide; the scandium oxide refining process comprises: dissolving the obtained primary enriched scandium oxide with dilute hydrochloric acid, adding oxalic acid solution, precipitating, filtering by suction, calcining to obtain secondary enriched scandium oxide, dissolving the secondary enriched scandium oxide with hydrochloric acid solution, extracting, pickling, adding ammonia water for stripping, adding oxalic acid to extract for precipitating, filtering, drying the precipitate, and calcining to obtain finished scandium oxide with purity of up to 99.9%.

Description

technical field [0001] The invention relates to a method for preparing scandium oxide from chlorinated dust, belonging to the technical field of rare earth metals. Background technique [0002] Scandium oxide (Sc 2 o 3 ) is one of the more important products in scandium products, and its physical and chemical properties are similar to those of rare earth oxides (such as La 2 o 3 , Y 2 o 3 etc.) are similar, so the process technology used in production is basically similar. sc 2 o 3 It is the production of metal scandium and various scandium alloys (Al-S c , Al-Z r -S c series), these scandium products have practical value and economic value, and are modern new materials. due to Sc 2 o 3 It has some characteristics, so it has good application prospects in aluminum alloys, electric light sources, lasers, catalysts, activators, ceramics and aerospace, and its development prospects are very broad. [0003] Scandium is a typical dispersed lithophile element, but it ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00
CPCC01F17/206C01P2006/80
Inventor 许胜凡胡晓波
Owner 锦州海特新材料科技有限公司
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