Method of producing ranadium pentoxide using vanadium containing waste catalyst

A technology of vanadium pentoxide and waste catalyst, which is applied in the direction of catalyst regeneration/reactivation, vanadium oxide, chemical instruments and methods, etc. Extended life, no maintenance costs, and reduced floor space effects

Inactive Publication Date: 2006-03-29
刘亚光
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Problems solved by technology

Due to corrosion, pipe burst, etc., production is often stopped, and each stop is at least 3 days. Although it has been repaired many times, the effect is not ideal, and it can only be removed in the end.
[0007] Due to the high temperature at the

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  • Method of producing ranadium pentoxide using vanadium containing waste catalyst
  • Method of producing ranadium pentoxide using vanadium containing waste catalyst

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9-9.5

97.32

[0056] 4. The calcined material is then dissolved in 2.5-3 times the weight of hot water at 80-85°C, and the leaching time is 40-60 minutes under stirring. At the same time, it is filtered through a filter to separate the solid from the liquid, and recover sodium vanadate and molybdic acid Sodium solution is the secondary leaching solution;

[0057] 5. Combine the above two leaching liquids; press 5kg / m 3 Add CaCl 2 Remove impurity phosphorus, filter and separate the leaching solution through a plate and frame filter at room temperature to form a purified leaching solution, add excess ammonium chloride to the leaching solution to make sodium vanadate precipitate ammonium metavanadate, and sodium molybdate stay in the solution and To achieve the separation of vanadium and molybdenum; put the separated ammonium metavanadate into the tablet furnace, and decompose the ammonium vanadate at 800-850°C to obtain molten V 2 o 5 , the finished product is ma...

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Abstract

A process for preparing V2O5 from the used catalyst containing V includes such steps as removing deposited oil from said catalyst, pulverizing, immersing in water, oxidizing, adding alkali to regulate pH=8.5-9.5, extracting at 50-60 deg.C for 1-2 hr, solid-liquid separation, recovering the solution of sodium vanadate and sodium molybdate, washing filtered dregs, calcining in rotary furnace, dissolving the calcined material in water, stirring, solid-liquid separation, recovering the solution of sodium vanadate and sodium molybdate, collecting said solution, removing impurity P, adding ammonium chloride to generate ammonium metavanadate deposit, solid-liquid separation, adding ammonium metavanadate in flake-making furnace, decomposing at 800-850 deg.C to obtain fused V2O5, and preparing V2O5 flakes.

Description

technical field [0001] The invention belongs to the technical field of recovery of heavy metals, in particular to a method for producing vanadium pentoxide by using spent vanadium-containing catalysts. Background technique [0002] As we all know, catalysts (catalysts) are widely used in petroleum, chemical and other fields, and are indispensable substances for improving reaction speed and product yield. After being used for a period of time, due to poisoning and other reasons, the catalyst will gradually lose its catalytic effect and be scrapped and become waste. These spent catalysts contain various metals in different proportions, such as platinum, palladium, ruthenium, nickel, cobalt, vanadium, molybdenum, copper, aluminum, zinc, etc., and the most important use of vanadium in the chemical industry is as Catalysts, such as heavy oil dehydrogenation, desulfurization, production of sulfuric acid by contact method, synthesis of special rubber, and synthesis of several orga...

Claims

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Application Information

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IPC IPC(8): C01G31/02
CPCB01J23/22B01J38/02B01J38/485C01G31/02
Inventor 刘亚光
Owner 刘亚光
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