Method for recycling vanadium and molybdenum from waste petroleum catalyst

A waste catalyst and catalyst technology, applied in the field of recovery of vanadium and molybdenum, and recovery of vanadium and molybdenum from waste petroleum catalysts, can solve problems such as technological level gaps, reduce production costs, improve technical service levels and product market competitiveness, and realize The effect of recycling

Inactive Publication Date: 2016-01-27
刘楚玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A domestic factory has also carried out industrial trial production. The leaching rate of vanadium is 75% to 85%, and the recovery rate is only about 72%, while the recovery rate of molybdenum is only about 50%. Compared with foreign countries, there is still a big gap in the technological level.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A method for reclaiming vanadium and molybdenum from waste petroleum catalysts, comprising the steps of:

[0028] (1) First ignite the spent catalyst in the air at 500°C to burn off the carbon and oil in it;

[0029] (2) Break up the spent catalyst after air burning and deoiling;

[0030] (3) Mix the crushed spent catalyst with sodium carbonate solution at a ratio of 1:1, and roast at 600°C for 0.5h;

[0031] (4) The roasted material is immersed in hot water at 60°C for 0.5h, at this time, the sodium salt of vanadium and molybdenum is dissolved in water and filtered into the leach solution;

[0032] (5) Adjust the pH value of the leaching solution to 8 with acid to remove aluminum;

[0033] (6) Adjust the pH of the solution after removing aluminum to 7, add ammonium chloride, the vanadium precipitation temperature is 50°C, and the precipitation time is 30 minutes;

[0034] (7) The solution after vanadium precipitation is concentrated and enriched by ion exchange meth...

Embodiment 2

[0036] A method for reclaiming vanadium and molybdenum from waste petroleum catalysts, comprising the steps of:

[0037] (1) First ignite the spent catalyst in the air at 550°C to burn off the carbon and oil in it;

[0038] (2) Break up the spent catalyst after air burning and deoiling;

[0039] (3) Mix the crushed spent catalyst with sodium carbonate solution at a ratio of 1:1.5, and roast at a high temperature of 700°C for 1 hour;

[0040] (4) The roasted material is immersed in hot water at 70°C for 1 hour, at this time, the sodium salt of vanadium and molybdenum is dissolved in water and filtered into the leaching solution;

[0041] (5) Use acid to adjust the pH value of the leaching solution to 9 to remove aluminum;

[0042] (6) Adjust the pH of the solution after removing aluminum to 8, add ammonium chloride, the vanadium precipitation temperature is 60°C, and the precipitation time is 40 minutes;

[0043] (7) The solution after vanadium precipitation is concentrated ...

Embodiment 3

[0045] A method for reclaiming vanadium and molybdenum from waste petroleum catalysts, comprising the steps of:

[0046] (1) First ignite the spent catalyst in the air at 600°C to burn off the carbon and oil in it;

[0047] (2) Break up the spent catalyst after air burning and deoiling;

[0048] (3) Mix the crushed spent catalyst with sodium carbonate solution at a ratio of 1:2, and roast at 800°C for 0.5h;

[0049] (4) Soak the roasted material in hot water at 80°C for 2 hours. At this time, the sodium salt of vanadium and molybdenum is dissolved in water and filtered into the leach solution;

[0050] (5) Adjust the pH value of the leaching solution to 10 with acid to remove aluminum;

[0051] (6) Adjust the pH of the solution after removing aluminum to 9, add ammonium chloride, the vanadium precipitation temperature is 80°C, and the precipitation time is 50 minutes;

[0052] (7) The solution after vanadium precipitation is concentrated and enriched by ion exchange method ...

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PUM

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Abstract

The invention relates to a method for recycling vanadium and molybdenum from a waste petroleum catalyst, and belongs to the technical field of petrochemical industry. The method comprises air-burning and ball-removing, ball-milling, soda roasting-water leaching, aluminum removing, molybdenum precipitating and enriching molybdenum by ion exchange. The method specifically comprises the following steps: firstly, igniting sticky oil in the waste catalyst in air to burn carbon and oils in the waste catalyst; then, oxidizing the vanadium and nickel in the forms of porphyrin compounds in the waste catalyst into vanadium oxide and nickel oxide, converting most of the molybdenum into molybdenum oxide, wherein the waste catalyst subjected to air-burning and oil-removing is more beneficial for crushing, and the crushed waste catalyst and a certain proportion of sodium carbonate are mixed, and are roasted at a high temperature; leaching roasted materials by hot water, dissolving sodium salts of the vanadium and the molybdenum into water to obtain a solution, filtering the solution, introducing the filtered solution into a leaching solution, introducing a little aluminum into the leaching solution, regulating the pH value of the solution to remove aluminum; regulating the pH value of the solution to 8-9, adding ammonium chloride, precipitating and separating out the vanadium in the form of ammonium vanadate; and concentrating vanadium-precipitated solution by adopting an ion exchange process and enriching an ammonium molybdate solution.

Description

technical field [0001] The invention relates to a method for recovering vanadium and molybdenum, in particular to a method for recovering vanadium and molybdenum from waste petroleum catalysts, and belongs to the technical field of petrochemical industry. Background technique [0002] Vanadium is one of the scarce metals in the world. At present, more than 70% of the vanadium supplied in the world is produced with vanadium-rich iron slag, waste catalyst and stone coal ash as raw materials. Because petroleum contains vanadium, this metal is easily adsorbed on the catalyst during the hydrodesulfurization process of petroleum refining, causing the catalyst to fail. According to statistics, about 500,000 to 700,000 tons of spent catalysts are produced every year in the world, which are valuable resources for extracting vanadium, molybdenum, and nickel. Abroad attaches great importance to research in this area. The United States and other countries have established special fac...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B34/22C22B34/34
CPCY02P10/20
Inventor 刘楚玲
Owner 刘楚玲
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