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Method for preparing vanadium pentoxide

A technology of vanadium pentoxide and sodium hydroxide, which is applied in the direction of vanadium oxide, etc., can solve the problems of increasing production cost, pollution, environmental pollution, etc., and achieve the effect of improving utilization rate, low cost, and good comprehensive utilization effect

Active Publication Date: 2015-01-07
江西钒业科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Although the yield of vanadium pentoxide of the above three preparation processes is relatively high, reaching more than 80%, because roasting is required in the process flow, a large amount of waste gas will be generated during the roasting process, which will cause greater pollution to the environment. At the same time, a large amount of waste residue is produced after combustion, and waste water is also inevitably produced in the production process. The discharged "three wastes" cause certain pollution to the environment, and subsequent "three wastes" treatment will also invisibly increase production costs. increase investment

Method used

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  • Method for preparing vanadium pentoxide

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Effect test

Embodiment 1

[0034] The preparation method of vanadium pentoxide is as follows:

[0035] (A) After pulverizing the stone coal, adding sulfuric acid solution and sodium chlorate in turn, stirring evenly and fermenting at constant temperature for 7 days, to obtain the first mixture;

[0036] (B) Add deionized water with a mass ratio of 1:1 to the first mixture at a temperature of 90° C., stir for 30 minutes and then carry out solid-liquid separation. The solid phase is cinder with a water mass percentage of 20%, and the liquid phase It is a mixed solution of various metal elements mainly containing vanadium;

[0037] (C) the liquid phase is left to stand to obtain the first precipitate potassium alum, after separating the first precipitate, add ammonium bicarbonate in the first supernatant and stir evenly, continue to stand for 3h and separate the second precipitate ammonium alum, And obtain the second supernatant;

[0038] (D) Calcium hydroxide is added to the second supernatant, and the ...

Embodiment 2

[0042] The preparation method of vanadium pentoxide is as follows:

[0043] (A) Put the stone coal into a ball mill after pulverizing it to a particle size of 2-3cm until the particle size is more than 120 mesh, then add sulfuric acid solution and sodium chloride and potassium chloride successively, and stir evenly After fermenting at a constant temperature for 10 days at a temperature of 150° C., the first mixture is obtained, and the first mixture is ground and pulverized until the particle size is above 80 mesh;

[0044] (B) Add the first mixture to the first mixture at a temperature of 80°C and add deionized water with a mass ratio of 1:3 to the first mixture, add 1% calcium oxide to the first mixture, and perform solid-liquid separation after stirring for 50 minutes. The solid phase is Coal slag with a water mass percentage of 30%, the liquid phase is a mixed solution of various metal elements mainly containing vanadium;

[0045] (C) the liquid phase is left to stand to ...

Embodiment 3

[0050] The preparation method of vanadium pentoxide is as follows:

[0051] (A) Pulverize the stone coal with a pulverizer to a particle size of 2-3 cm, put it into a ball mill for ball milling until the mesh particle size is above 120 mesh, add sulfuric acid solution and potassium chlorate in sequence, and stir evenly at a temperature of 150°C After stacking and fermenting at a constant temperature for 8 days, the first mixture was obtained, and the first mixture was ground and pulverized until the mesh particle size was above 80 mesh;

[0052] (B) Add the first mixture at a temperature of 80°C to the deionized water whose mass is 1:2 with the first mixture, add 2% calcium oxide to the first mixture, stir for 40 minutes and perform solid-liquid separation, the solid phase is Coal slag with a water mass percentage of 25%, and the liquid phase is a mixed solution of various metal elements mainly containing vanadium;

[0053] (C) the liquid phase is left to stand to obtain the ...

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Abstract

The invention relates to the field of production of vanadium pentoxide and in particular relates to a method for preparing vanadium pentoxide. The method comprises the following steps: (A) adding a sulfuric acid solution and an additive into stone coal, thereby obtaining a first mixture; (B) adding the first mixture into deionized water, stirring, and performing solid-liquid separation; (C) standing the liquid phase, thereby obtaining a first precipitate, separating the first precipitate, adding ammonium bicarbonate into the first supernatant, stirring to be uniform, continuously standing and separating a second precipitate, thereby obtaining the second supernatant; (D) adding calcium hydroxide and / or calcium oxide into the second supernatant, thus obtaining a third precipitate and the third supernatant; (E) saturating an ion exchange resin, eluting by using sodium hydroxide, thereby obtaining a vanadium solution; and (F) adding a pH regulator into the vanadium solution, adding hydrogen peroxide, finally adding ammonium chloride, performing centrifugal separation, obtaining a precipitate ammonium metavanadate, carrying out an ammonium metavanadate decomposition reaction, thereby obtaining the vanadium pentoxide. According to the preparation method disclosed by the invention, the cost is low, and three wastes are avoided.

Description

technical field [0001] The invention relates to the field of vanadium pentoxide production, in particular to a preparation method of vanadium pentoxide. Background technique [0002] Vanadium is a non-ferrous metal. Vanadium pentoxide is widely used in metallurgy, chemical industry and other industries, mainly for smelting ferrovanadium. Used as an alloy additive, accounting for more than 80% of the total consumption of vanadium pentoxide, followed by a catalyst for organic chemical industry, that is, a catalyst, accounting for about 10% of the total, and used elsewhere as inorganic chemicals, chemical reagents, enamel and magnetic materials account for about 10% of the total [0003] Nowadays, there are mainly three kinds of production methods of vanadium pentoxide, one is to use vanadium slag as raw material to produce vanadium pentoxide, the other is to use spent vanadium catalyst as raw material to produce vanadium pentoxide, and the third is to use vanadium-containing ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/02
CPCC01G31/02
Inventor 彭海泉彭小艳彭清
Owner 江西钒业科技有限公司
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