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A method for extracting vanadium by reductive organic acid leaching of spent vanadium-containing catalyst

A technology for waste catalyst and organic acid, which is applied in the fields of non-ferrous metal metallurgy and resource recycling, and achieves the effects of high leaching rate, easy purification and low leaching temperature

Active Publication Date: 2019-01-08
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the use of reducing organic acid systems to directly extract vanadium-containing spent catalysts.

Method used

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  • A method for extracting vanadium by reductive organic acid leaching of spent vanadium-containing catalyst
  • A method for extracting vanadium by reductive organic acid leaching of spent vanadium-containing catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In this example, V 2 o 5 The sulfuric acid industrial waste catalyst with a content of 3.21% is leached with formic acid to extract vanadium, and the specific process is as follows:

[0033] (1) the sulfuric acid industry waste catalyst is ball milled to a particle size less than 100 mesh;

[0034] (2) The powder obtained in (1) is added to formic acid solution for leaching, the leaching temperature is 80°C during the process, the leaching time is 5h, and the liquid-solid ratio is 6:1m 3 / t, formic acid concentration is 2mol / L, obtains leach solution and leach residue;

[0035] (3) the vanadium content is detected in the leach solution that step (2) obtains, and the extraction rate of vanadium reaches 90.2%, and the leach solution is blue, with VO 2+ Ion-based, adjust the pH to 10 with ammonia water, stand and separate to obtain ammonium vanadate precipitation, and cool and crystallize ammonium vanadate at 400°C to obtain vanadium pentoxide product;

[0036] (4) Apply...

Embodiment 2

[0038] In this example, V 2 o 5 Content is 0.78% synthetic maleic anhydride waste catalyst leaching vanadium with citric acid, concrete process is as follows:

[0039] (1) The waste catalyst of synthetic maleic anhydride is ball-milled to a particle size less than 300 mesh;

[0040] (2) Add the powder obtained in (1) to leaching with citric acid, the leaching temperature in the process is 120°C, the leaching time is 3h, and the liquid-solid ratio is 8:1m 3 / t, the citric acid concentration is 7mol / L, obtains leach solution and leach residue;

[0041] (3) the leach solution that step (2) obtains is detected vanadium content, and the leaching rate of vanadium reaches 97.0%, and the leach solution is yellow-green, with VO 2 + Ion-based, adjust the pH to 8.5 with ammonia water, stand and separate to obtain ammonium vanadate precipitation, and cool and crystallize ammonium vanadate at 500°C to obtain vanadium pentoxide product;

[0042] (4) apply the leaching residue that step...

Embodiment 3

[0044] In this example, V 2 o 5 Vanadium is leached with mixed acid of oxalic acid and ascorbic acid from the waste catalyst of petroleum industry with a content of 14.70%. The specific process is as follows:

[0045] (1) ball-milling waste catalysts from the petroleum industry to a particle size of less than 150 mesh;

[0046] (2) Add oxalic acid and ascorbic acid mixed acid to extract the powder obtained in (1). 3 / t, the concentration of oxalic acid is 1mol / L, and the concentration of ascorbic acid is 0.5mol / L to obtain leachate and leach residue;

[0047] (3) the vanadium content is detected in the leach solution that step (2) obtains, and the extraction rate of vanadium reaches 93.45%, and the leach solution is blue, with VO 2+ Ion-based, the pH is adjusted to 10 with ammonia water, and the ammonium vanadate precipitate is obtained by static separation, and the vanadium pentoxide product is obtained by cooling and crystallizing the ammonium vanadate at 600°C for calcin...

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Abstract

The invention relates to the field of non-ferrous metallurgy and resource recycling, in particular to a novel process for extracting vanadium from vanadium-containing waste catalyst reductive organic acid. The novel process comprise the steps that a vanadium-containing waste catalyst is directly extracted in a reductive organic acid system, and other reductive agents are not added, so that pentavalent or tetravalent vanadium is directly reduced into vanadium-oxygen-based ions or trivalent vanadium ions, the vanadium-oxygen-based ions or the trivalent vanadium ions are combined with organic acid radical anions and enter a solution, and vanadium-containing leaching liquid and vanadium-containing leaching slag are obtained; and ammonia water is added into the vanadium-containing leaching liquid to adjust pH so that ammonium vanadate can be formed and precipitated, and after separating is conducted, a vanadium pentoxide product is obtained by calcining precipitation slag. According to the novel process for extracting the vanadium from the vanadium-containing waste catalyst reductive organic acid, the vanadium is extracted by adopting the reductive organic acid system; the extracting condition is mild; the vanadium extracting rate is 95% or above and higher than the direct inorganic acid fluid extracting rate; and other impurity ions are not introduced in the extracting process, so that recycling of other metal elements in the waste catalyst is not affected.

Description

technical field [0001] The invention relates to the fields of nonferrous metal metallurgy and resource recycling, in particular to a method for extracting vanadium by reductive organic acid leaching of spent vanadium-containing catalysts. Background technique [0002] Vanadium is an important beneficial metal element, known as "monosodium glutamate of modern industry", is an important strategic resource of the country, widely used in iron and steel, non-ferrous metals, chemical and chemical industries, such as vanadium-containing steel in the iron and steel industry, which has strength High toughness, good wear resistance, etc., so it is widely used in machinery, automobiles, shipbuilding, railways and other industries; it is widely used as a catalyst in the chemical industry and petroleum industry, such as sulfuric acid industry, petroleum industry, flue gas denitrification, Synthetic polyethylene, maleic anhydride, etc. At present, there are many raw materials for vanadiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B7/00C22B34/22
CPCY02P10/20
Inventor 李会泉武文粉包炜军王晨晔
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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