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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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  • Description
  • Claims
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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 high production costs, etc. Problem, the present invention provides a method for preparing high-purity vanadium pentoxide, the method prepares vanadium pentoxide by adopting the method of chlorination roasting, does not need to use strong acid and strong alkali in the process, the cost is low, and there is no waste produce

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  • Preparation method of vanadium pentoxide

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Effect test

Embodiment 1

[0058] (1) Calcium vanadate (containing V 2 o 5 About 35%) and carbon powder with a particle size of 100-150 μm are evenly mixed according to the molar ratio of vanadium element and carbon powder at 1:1.5, then placed in a tubular chlorination furnace, fed with chlorine gas and protective gas nitrogen and heated to 400 °C , chlorinated and roasted for 3 hours after the temperature was constant;

[0059] (2) Adopt gas collection device to collect the vanadium-containing gas that produces in the chlorination roasting process;

[0060] (3) Condensing the vanadium-containing gas at 120° C. through an adjustable spray and then cooling to room temperature to obtain a vanadium-containing substance with a vanadium oxychloride content of 99.95 wt%, and returning the tail gas obtained after condensation and cooling to step (1) for recycling;

[0061] (4) The obtained vanadium-containing substance is directly leached with pure water at 70°C and kept warm for 0.5h. After the reaction is...

Embodiment 2

[0064] (1) Calcium vanadate (containing V 2 o 5 About 35%) and carbon powder with a particle size of 20-50 μm are uniformly mixed according to the molar ratio of vanadium element and carbon powder at 1:2, then placed in a tubular chlorination furnace, fed with chlorine gas and protective gas argon and heated to 600 ℃, continue chlorination and roasting for 2 hours after the temperature is constant;

[0065] (2) Adopt gas collection device to collect the vanadium-containing gas that produces in the chlorination roasting process;

[0066] (3) Condensing the vanadium-containing gas at 125° C. for 0.5 to 1 h through an adjustable spray and then cooling to obtain a vanadium-containing substance with a vanadium oxychloride content of 99.95 wt%, and returning the tail gas obtained after condensation and cooling to step (1) for recycling ;

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

Embodiment 3

[0070] (1) Calcium vanadate (containing V 2 o 5 About 35%) and carbon powder with a particle size of 200-250 μm are uniformly mixed according to the molar ratio of vanadium element and carbon powder at 1:1, then placed in a tubular chlorination furnace, and a mixture of chlorine gas and protective gas argon and neon is introduced Gas and heated to 500 ° C, after the temperature is constant, continue chlorination and roasting for 3 hours;

[0071] (2) Adopt gas collection device to collect the vanadium-containing gas that produces in the chlorination roasting process;

[0072] (3) Condensing the vanadium-containing gas at 100° C. for 0.5 to 1 h through adjustable spraying and then cooling to obtain a vanadium-oxychloride content of 99.91 wt % vanadium-containing substance, and returning the tail gas obtained after condensation and cooling to step (1) for recycling;

[0073] (4) The obtained vanadium-containing substance is directly leached with pure water at 70°C and kept war...

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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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