Preparation method of vanadium pentoxide

A vanadium pentoxide and chlorination furnace technology, applied in the direction of vanadium oxide, etc., can solve the problems of ineffective treatment of waste residue and wastewater, high requirements for the preparation environment, and high equipment requirements, and achieve low cost, simple process flow, and short reaction time. Effect

Inactive Publication Date: 2016-07-20
HEBEI IRON AND STEEL
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Problems solved by technology

[0007] In view of the existing technology in the process of preparing high-purity (purity ≥ 99.9wt%) vanadium pentoxide, strong acid and strong alkali are required, high requirements for equipment, ineffective treatment of waste residue and wastewater in the process, high requirements for the preparation environment and hi

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  • Preparation method of vanadium pentoxide

Examples

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Example Embodiment

[0057] Example 1:

[0058] (1) Mill the ball to a calcium vanadate with a particle size of 100~150μm (containing V 2 O 5 About 35%) and carbon powder with a particle size of 100~150μm according to the molar ratio of vanadium element to carbon powder of 1:1.5, then place it in a tubular chlorination furnace, pass in chlorine and protective gas nitrogen and heat to 400℃ , After the temperature is constant, chlorination roasting for 3h;

[0059] (2) Use a gas collection device to collect the vanadium-containing gas generated during the chlorination roasting process;

[0060] (3) The vanadium-containing gas is condensed at 120°C by adjustable spray and then cooled to room temperature to obtain a vanadium-containing substance with a vanadium oxychloride content of 99.95% by weight, and the tail gas obtained after condensation and cooling is returned to step (1) for recycling;

[0061] (4) The obtained vanadium-containing substance was directly leached with pure water at 70°C and kept for 0...

Example Embodiment

[0063] Example 2:

[0064] (1) Mill the ball to a calcium vanadate with a particle size of 20-50μm (containing V 2 O 5 About 35%) and carbon powder with a particle size of 20-50μm according to the molar ratio of vanadium element to carbon powder of 1:2, and then put it in a tubular chlorination furnace, pass in chlorine and protective gas argon and heat to 600 ℃, continue chlorination roasting for 2h after the temperature is constant;

[0065] (2) Use a gas collection device to collect the vanadium-containing gas generated during the chlorination roasting process;

[0066] (3) The vanadium-containing gas is condensed by adjustable spray at 125°C for 0.5-1h and then cooled to obtain a vanadium-containing substance with a vanadium oxychloride content of 99.95% by weight, and the tail gas obtained after condensation and cooling is returned to step (1) for recycling ;

[0067] (4) The obtained vanadium-containing substance is directly leached with pure water at 50°C and kept for 1h. Afte...

Example Embodiment

[0069] Example 3:

[0070] (1) Mill the ball to a particle size of 300~350μm calcium vanadate (containing V 2 O 5 About 35%) and the carbon powder with a particle size of 200~250μm according to the molar ratio of vanadium element to carbon powder at 1:1, then place it in a tubular chlorination furnace, and pass in a mixture of chlorine and protective gas argon and neon. The gas is heated to 500°C, and the temperature is constant and the chlorination roasting is continued for 3 hours;

[0071] (2) Use a gas collection device to collect the vanadium-containing gas produced during the chlorination roasting process;

[0072] (3) The vanadium-containing gas is condensed through adjustable spray at 100°C for 0.5-1h and then cooled to obtain a vanadium-containing substance with a vanadium oxychloride content of 99.91wt%, and the tail gas obtained after condensation and cooling is returned to step (1) for recycling;

[0073] (4) The obtained vanadium-containing substance was directly leached ...

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Abstract

The invention provides a preparation method of vanadium pentoxide.The method comprises the following steps that a pretreated vanadium-containing raw material and carbon powder are mixed to be uniform and then placed in a chlorination furnace, chlorine gas and protective gas are introduced into the furnace, and roasting under heating is performed; after roasting is finished, vanadium-containing gas generated in the roasting process is collected; the vanadium-containing gas is condensed and cooled to obtain a vanadium-containing substance, tail gas obtained through condensing and cooling returns to the roasting process to be cyclically utilized; the obtained vanadium-containing substance is subjected to water immersion, and then solid-liquid separation is performed; a solid phase obtained through solid-liquid separation is washed and dried to obtain vanadium pentoxide, and a liquid phase obtained through solid-liquid separation returns to the water immersion process to be cyclically utilized after being neutralized.According to the preparation method, efficient extraction of vanadium is achieved through a chloridizing roasting method, the technological procedures are simple, the reaction time is short, the vanadium conversion rate is high, and the efficient and clean production method is supplied to preparation of vanadium pentoxide.

Description

technical field [0001] The invention belongs to the field of fine chemicals, and relates to a method for preparing vanadium pentoxide, in particular to a method for preparing high-purity vanadium pentoxide through a chlorination roasting method. Background technique [0002] Vanadium pentoxide (V 2 o 5 ) plays a vital role in industrial production with its excellent physical and chemical properties, mainly used in metallurgy and chemical industries; secondly, when vanadium pentoxide is used as a catalyst, it has stable performance, high efficiency and long service life It is also widely used in industries such as organic synthesis, petroleum cracking, sulfuric acid production and synthetic ammonia due to its low price and low price. High-purity vanadium pentoxide is an important fine chemical product and a raw material for producing metal vanadium and vanadium alloys. It has a wide range of uses and is an important export-earning chemical product. [0003] Vanadium-titani...

Claims

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Application Information

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IPC IPC(8): C01G31/02
CPCC01G31/02C01P2006/80
Inventor 高明磊赵备备李兰杰陈东辉周冰晶白丽
Owner HEBEI IRON AND STEEL
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