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Method for extracting vanadium pentoxide from vanadium-containing spent catalyst and petroleum ash

A technology of vanadium pentoxide and waste catalyst, applied in chemical instruments and methods, vanadium oxide, vanadium compounds, etc., can solve the problems of great change in leaching rate and decrease in leaching rate, and achieve stable product quality, high recovery rate, The effect of improving production efficiency

Inactive Publication Date: 2005-06-29
朴俊民
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Problems solved by technology

Rotary kiln roasting due to the different types of spent catalysts, the leaching rate of vanadium and molybdenum varies greatly, and sometimes the leaching rate drops by 50%

Method used

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  • Method for extracting vanadium pentoxide from vanadium-containing spent catalyst and petroleum ash
  • Method for extracting vanadium pentoxide from vanadium-containing spent catalyst and petroleum ash
  • Method for extracting vanadium pentoxide from vanadium-containing spent catalyst and petroleum ash

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Embodiment

[0069] 1. Pre-mixing: first determine the V in the raw material waste catalyst or petroleum ash 2 o 5 Occupied content, the molar ratio of raw materials according to the production process formula is Na 2 CO 3 :V 2 o 5 =2~4:1, and adding Na 2 CO 3 At the same time, add an appropriate amount of NaCl (excipient), Na 2 CO 3 The ratio of parts by weight and NaCl input is 1:0.1-0.2, to reduce the temperature of sodium roasting, mix in the mixer and then discharge; send it to the storage bin through the belt conveyor for crushing;

[0070] 2. Crushing: Vanadium-containing waste is crushed to 20-40 mesh with a hammer crusher, and the powder is put into the storage bin for standby;

[0071] 3. Sodium roasting: The purpose of sodium roasting is to convert insoluble vanadium compounds into soluble sodium vanadate for leaching and extraction of vanadium pentoxide. The crushed materials are continuously sent to the rotary kiln by the hoist and the feeding bin for roasting. The f...

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Abstract

A method for abstracting vanadium pentoxide using waste catalyzer containing vanadium and ash of oil is disclosed: firstly, obtain the content of V2O5 in the waste catalyzer or ash of oil, then add superfluous Na2CO3 according to mol ratio, which are mixed and shattered to be 20-60 7 ; the mixture shattered are sent into rotary kiln to be roasting for 4-6 hours; the mixture then are agtatered and dissolved in hot water, meanwhile, add CaCl2 to clear phosphor, separate the solid and liquid by filter recover sodium vanadium and sodium molybdate; under the normal temperature, the PH value is equal to 8~9.5, add superfluous ammonium chloride into the sodium vanadium and sodium molybdate, generating 15 deposit, while sodium molybdateremains in the solution to separate vanadium and molybdenum ; the 15 is broken down to be molten V2O5, then after melt, acquiring the product. The invention has low cost of electric energy, easy melt of substance, low cost and stable quality, better than other technology, especially then V2O5 produced by vanadium.

Description

technical field [0001] The invention belongs to the technical field of heavy metal recovery, in particular to a method for extracting vanadium pentoxide by utilizing spent vanadium-containing catalysts and petroleum ash. Background technique [0002] Vanadium is one of the important strategic materials. It is mainly used in national defense, energy and metallurgical industries. The most important use of vanadium in the chemical industry is as a catalyst, such as dehydrogenation of heavy oil, desulfurization, production of sulfuric acid by contact method, synthesis of special rubber, and synthesis of some organic compounds in the organic industry. A vanadium catalyst is used. After a period of use, due to poisoning and other reasons, the vanadium catalyst will gradually lose its catalytic effect and be scrapped, becoming vanadium-containing waste. [0003] Due to the shortage of vanadium resources, about 1 million tons of spent catalysts are produced in the world every year....

Claims

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Application Information

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IPC IPC(8): B09B3/00C01G31/00C01G31/02C01G39/00
Inventor 刘亚光
Owner 朴俊民
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