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Method for recovering vanadium from waste FCC catalyst

A catalyst and conversion technology, applied in the direction of vanadium oxide, etc., can solve the problems of vanadium that has not been reported in the literature, and achieve the effect of low environmental pollution and high purity

Inactive Publication Date: 2013-10-02
岳阳鼎格云天环保科技有限公司
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Problems solved by technology

[0004] However, there is no literature report on the recovery of vanadium from spent FCC catalysts.

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  • Method for recovering vanadium from waste FCC catalyst

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Embodiment Construction

[0018] The present invention provides a kind of method that reclaims vanadium from spent FCC catalyst, further illustrate technical scheme of the present invention through specific implementation below:

[0019] A method for reclaiming vanadium from spent FCC catalysts, characterized in that: the method comprises the following steps:

[0020] Step 1: Add hydrochloric acid to the FCC catalyst for leaching to remove solid residues, and the metal elements contained in it are converted into hydrochloric acid double salt leaching solution. The leaching temperature is 60°C, the leaching time is 6 hours, the concentration of hydrochloric acid is 3mol / L, and the liquid-solid ratio is 6:1;

[0021] Step 2: reclaim the aluminum compound in the leaching solution;

[0022] Step 3: The remaining FCC residue is acidified with hydrochloric acid and converted into metal chlorides, extracted with P507 extract, and nickel is separated. 2.0mol / L, kerosene as diluent;

[0023] Step 4: Select 0...

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Abstract

The invention discloses a technology for separating and recovering vanadium from waste FCC (fluid catalytic cracking) catalyst. The technology comprises the steps of leaching with 3mol / L hydrochloric acid, removing residues, recovering an aluminum compound, acidizing FCC residues with hydrochloric acid, converting the FCC residues into metal chloride, extracting with a P507 extract to obtain a rare earth chloride solution with an organic phase rich in V, separating purified vanadium in a vanadate anion form by an ion-exchange method, oxidizing to produce pentavalent vanadium with hydrogen peroxide at 60 DEG C, adding ammonia water to adjust a pH (Potential of Hydrogen) value to 1.9-2.2, adding ammonium sulfate, stirring for 3h at 90-95 DEG C to precipitate out red vanadium, and pyrolyzing and baking at 500-550 DEG C to generate V2O5. The method can recover vanadium metal from the FCC catalyst, and is easy and simple to operate, and the product purity of recovered vanadium pentoxide is high, and reaches 97%. The quality reaches the national standard GB 3283-87. The method is applicable to recovering vanadium from the FCC catalyst industrially and massively.

Description

technical field [0001] The invention relates to a method for recovering vanadium from waste FCC catalysts, and belongs to the field of waste metal regeneration and utilization. Background technique [0002] FCC catalyst, namely petroleum catalytic cracking catalyst, is a very important catalyst in the petroleum refining industry. The spent FCC catalyst contains a certain amount of useful substances such as vanadium and nickel, which is a very important strategic resource. If it is not handled properly, it will not only cause environmental pollution, but also cause the loss of useful metals in the spent catalyst, resulting in a waste of resources. [0003] The techniques for extracting vanadium from spent vanadium catalysts mainly include solvent extraction and ion exchange, both of which started earlier abroad. There are also many studies on extraction methods in China, and there are many extraction agents for vanadium, but their industrial application is limited. The adv...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 廖乐王小云
Owner 岳阳鼎格云天环保科技有限公司
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