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Method for producing ammonium metavanadate by using waste catalytic cracking catalyst in oil refinery

A waste catalyst, ammonium metavanadate technology, applied in chemical instruments and methods, vanadium compounds, inorganic chemistry, etc., to achieve the effect of high recovery efficiency

Inactive Publication Date: 2015-04-08
武汉源宸再生资源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is no literature on the extraction of useful rare earth metals from spent catalysts

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0021] 1) Add 45 tons of spent catalyst, 36 tons of sulfuric acid, 1.8 tons of calcium fluoride, and 3.6 tons of water into the mixer and mix them for 4 minutes, then unload them into the aging bin, and ripen them in the aging bin at a temperature of 150°C for 9 hours;

[0022] 2) Slurry the cured mixture in step 1) with water at a mass ratio of 1:2.5 for 0.9 h;

[0023] 3) Pump the slurry liquid in step 2) into the leaching tank, heat at 90° C., stir and leaching for 3 hours;

[0024] 4) Pumping the leachate in step 3) into a plate filter press for liquid-solid separation, the separated solid slag is washed with water and piled up, and the leachate flows into the crystallization tank;

[0025] 5) When the temperature in the crystallization tank is lowered to 35°C, the leachate volume is 76kg / m 3 Add ammonium sulfate and crystallize at 38°C for 2.3 hours;

[0026] 6) Step 5) After the crystallization is completed, the liquid-solid separation is obtained to obtain the aluminu...

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Abstract

The invention relates to a method for producing ammonium metavanadate by using a waste catalytic cracking catalyst in an oil refinery. The method comprises the following steps: mixing the waste catalyst with sulfuric acid, calcium fluoride and water in a mixer, feeding into a curing cabin, and curing in the curing cabin; pulpifying the mixed materials with water; pumping the pulpified liquid into a leaching tank, and heating and stirring for leaching; pumping into a plate filter press for liquid-solid separation, feeding the leachate into a crystallization tank, and adding ammonium sulfate to crystallize; and performing liquid-solid separation, thereby obtaining an aluminum ammonium sulfate product and crystallization master batch; and adding ammonium carbonate into the crystallization master batch to adjust the pH value, adding ammonium persulfate, adding ammonium carbonate to adjust the pH value, heating to react, pumping into the filter press, and performing liquid-solid separation, thereby obtaining ammonium metavanadate. The separated liquid can be also fed into a lanthanum-cerium deposition tank, and ammonium oxalate is added to react to obtain lanthanum oxalate and cerous oxalate, or the separated liquid is fed into a nickel deposition tank, and ammonium sulfide is added to react to obtain nickel sulfide. By adopting the method, the waste catalytic cracking catalyst in the oil refinery can be reused for producing ammonium metavanadate, the problems that the environment can be polluted by the waste catalyst and the land can be occupied are effectively solved, the purity of the produced ammonium metavanadate is even greater than 99%, and the recycling efficiency is high.

Description

technical field [0001] The invention relates to a technology for comprehensively utilizing waste catalytic cracking catalysts in oil refineries, in particular to a method for producing ammonium metavanadate from waste catalytic cracking catalysts in oil refineries. Background technique [0002] Most of the waste catalysts produced by oil refineries when refining crude oil with catalytic cracking technology are small particles of ultra-stable Y-type molecular sieve catalysts loaded with a small amount of rare earth metals. After a period of use, the catalytic activity decreases and the comprehensive economic indicators become worse. Unloaded from the system, it will not only pollute the environment, but also occupy the land. At present, there is no better process and method to effectively treat this spent catalyst, so that it can eliminate environmental pollution and effectively regenerate its own value of useful substances. [0003] For spent catalysts, most oil refineries ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G31/00
CPCC01G31/00
Inventor 王新王晓清
Owner 武汉源宸再生资源科技有限公司
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