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Method for preparing high-purity molybdic acid from waste catalyst

A waste catalyst and molybdenum acid technology, which is applied in the preparation of molybdenum compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of high cost, low purity of molybdenum and vanadium, and achieve the effect of low process cost

Inactive Publication Date: 2018-04-17
DALIAN DONGTAI RESOURCE RENEWABLE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the purity of molybdenum and vanadium obtained by the current separation process is not high, and high-purity molybdenum and vanadium must be obtained through multiple separation processes, which is expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] A kind of spent catalyst prepares high-purity molybdic acid method, described spent catalyst is residual oil hydrogenation spent catalyst, and described method has the following steps:

[0027] S1. The waste catalyst for residual oil hydrogenation is deoiled through a deoiling furnace to obtain industrial steam and deoiled materials. The treated oxygen content is greater than 10%;

[0028] S2. Mix the deoiled material and pure sodium hydroxide in a mass ratio of 1:0.25, and carry out sodium roasting treatment through a rotary kiln to obtain a sodium material containing water-soluble sodium molybdate, water-soluble sodium vanadate and nickel oxide , the temperature of the sodium roasting treatment is 1070°C, and the time of the sodium roasting treatment is more than 120min;

[0029] S3. The sodium chemical material is leached through four-stage countercurrent to separate nickel-aluminum powder and molybdenum-vanadium liquid. The temperature of each stage of countercurre...

Embodiment 2

[0037] A kind of spent catalyst prepares high-purity molybdic acid method, described spent catalyst is residual oil hydrogenation spent catalyst, and described method has the following steps:

[0038] S1. The waste catalyst for residual oil hydrogenation is deoiled through a deoiling furnace to obtain industrial steam and deoiled materials. The temperature of the deoiling treatment is 1375 ° C, and the time of the deoiling treatment is 65 minutes. The deoiling treatment Oxygen content greater than 10%;

[0039] S2. Mix the deoiled material and pure sodium hydroxide in a mass ratio of 1:0.32, and carry out sodium roasting treatment through a rotary kiln to obtain a sodium material containing water-soluble sodium molybdate, water-soluble sodium vanadate and nickel oxide , the temperature of the sodium roasting treatment is 1300°C, and the time of the sodium roasting treatment is more than 120min;

[0040] S3. The sodium chemical material is leached through four-stage countercur...

Embodiment 3

[0048] A kind of spent catalyst prepares high-purity molybdic acid method, described spent catalyst is residual oil hydrogenation spent catalyst, and described method has the following steps:

[0049] S1. The waste catalyst for residual oil hydrogenation is deoiled through a deoiling furnace to obtain industrial steam and deoiled materials. The temperature of the deoiling treatment is 1300 ° C, and the time of the deoiling treatment is 40 minutes. The deoiling treatment Oxygen content greater than 10%;

[0050] S2. Mix the deoiled material and pure sodium hydroxide in a mass ratio of 1:0.3, and carry out sodium roasting treatment through a rotary kiln to obtain a sodium material containing water-soluble sodium molybdate, water-soluble sodium vanadate and nickel oxide , the temperature of the sodium roasting treatment is 1300°C, and the time of the sodium roasting treatment is more than 120min;

[0051] S3. The sodium chemical material is leached through four-stage countercurr...

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Abstract

The invention discloses a method for preparing high-purity molybdic acid from a waste catalyst. A waste residue oil hydrogenation catalyst undergoes deoiling treatment, the obtained deoiled material undergoes sodiumization roasting, the obtained sodiumized material undergoes leaching reaction, the impurities of separated molybdenum-vanadium liquid are removed, vanadium is separated from obtained pure liquid, obtained molybdenum-containing liquid undergoes extraction and reverse extraction, the obtained sodium molybdate aqueous solution is added with concentrated sulfuric acid for precipitation, obtained molybdic acid is washed, and thereby high-purity molybdic acid is obtained. The process of the method is low in cost and environment-friendly, molybdenum in the waste residue oil hydrogenation catalyst can be effectively separated out, high-purity molybdic acid can be obtained without multiple times of separation processes, and the purity can reach 99.9 percent.

Description

technical field [0001] The present invention relates to a kind of chemical separation and purification technology, specifically a kind of spent catalyst prepares high-purity molybdic acid method. Background technique [0002] Spent catalysts are recognized environmental pollutants and must be converted into harmless substances before entering the environment. The waste catalyst for residual oil hydrogenation contains rare metals such as molybdenum and vanadium, which have high economic value. However, because molybdenum and vanadium have many chemical commonalities, separation is difficult. [0003] At present, the existing separation process includes: 1) using alkali-added roasting process, the auxiliary raw material added is Na 2 CO 3 , NaOH, NaCl or Na 2 SO 4 etc., the roasted product is leached with hot water, and the molybdenum and vanadium in the solution enter the solution in the form of soluble sodium salt, after which, the ammonium salt precipitation vanadium a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G39/00C22B7/00
CPCC01G39/003C22B7/006Y02P10/20
Inventor 梁昌雄侯连春迟洪建刘忠军
Owner DALIAN DONGTAI RESOURCE RENEWABLE
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