Method for producing high-purity vanadium pentoxide by chlorination

A technology of vanadium pentoxide and production method, applied in vanadium oxide and other directions, to achieve the effects of saving water resources, avoiding pollution, and high purity

Inactive Publication Date: 2013-06-05
刘艳梅
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, domestic documents related to the production of high-purity vanadium pentox

Method used

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  • Method for producing high-purity vanadium pentoxide by chlorination
  • Method for producing high-purity vanadium pentoxide by chlorination

Examples

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example 1

[0013] 50gV 2 o 5 (98%) mixed evenly with 16g graphite powder, put it into the back graphite crucible, and then dry it in the oven at 120°C for two hours, put it into the boiling chlorination furnace, feed dry nitrogen, heat up to 350°C and keep it warm. Gradually reduce the nitrogen feed rate and slowly feed dry chlorine gas, and finally replace the nitrogen gas completely with chlorine gas, and the reaction time is 60 minutes. The gaseous mixture generated by the reaction is passed through the cyclone dust collector, and the dust collector is mainly carbon particles and V that have not participated in the reaction. 2 o 5 Solid particles, after treatment, can be returned to the raw material area for further use. The obtained gaseous mixture passes through the condensing device to obtain the liquid phase mixture of vanadium chloride, and the uncondensed gaseous substances can be recycled after being purified. Pass the obtained liquid phase mixture through the secondary rec...

example 2

[0015] 100g vanadium slag (containing V 2 o 5 About 16%), 25g graphite powder, 350gKCl and 150gNaCl are mixed evenly and then put into an oven and dry at 120°C for two hours, then place in a molten salt chlorination furnace and heat up to 600°C-700°C. Inject dry nitrogen, and when the temperature reaches 600°C, reduce the amount of nitrogen introduced and gradually increase the amount of chlorine until it is at the same rate as chlorine. Control the temperature in the range of 650°C-700°C for 120min. Pass the generated gaseous mixture through a condensing device to obtain a liquid phase mixture of vanadium chloride, and the uncondensed gaseous substances can be recycled after being purified. Pass the obtained liquid phase mixture through the secondary rectification device to obtain vanadium oxytrichloride and vanadium tetrachloride liquid respectively, and vanadium tetrachloride is properly stored in a special container. Slowly pour the vanadium oxychloride liquid into the ...

example 3

[0017] 100g vanadium slag (containing V 2 o 5 about 16%), 25g of coke powder is mixed evenly, put into graphite crucible and then dry at 120°C for two hours, then place in shaft furnace, heat up to 600°C under the protection of dry nitrogen, then start to introduce chlorine gas and Reduce the feed amount of nitrogen to 0, and control the temperature within the range of 630°C-670°C for 150min. The following steps are the same as Example 2. The obtained vanadium pentoxide has a purity of 99.70%.

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Abstract

The invention discloses a novel method for extracting and converting a substance containing vanadium into high-purity vanadium pentoxide by chlorination. The high-purity vanadium pentoxide process comprises batching, chlorination, dedusting, condensation, rectification, hydrolysis, filtering, drying and postprocessing. Raw materials comprise the substance containing vanadium and a carbon elementary substance and the weight ratio of the substance containing vanadium to the carbon elementary substance is 1: (0.05-0.25). The raw materials are evenly mixed, dried and put in a reactor and the high-purity vanadium pentoxide is obtained through successive chlorination, hydrolysis, postprocessing and the like. The novel method for producing high-purity vanadium pentoxide instead of a traditional method reduces industrial harmful waste water produced during a traditional hydrometallurgy process, and cyclic utilization of chlorine is achieved after the chlorine is processed. The whole production process is easy in process and basically free of produced wastes, and has certain economic benefit and social benefit. The purity of the vanadium pentoxide powder obtained by the method is 99.5%-99.99%.

Description

technical field [0001] The invention belongs to the chemical industry field, and in particular relates to a production method for enriching and converting vanadium elements in vanadium-containing substances into high-purity vanadium pentoxide through a chlorination method. Background technique [0002] Raw materials for vanadium extraction mainly come from vanadium ore, vanadium slag, steel slag, stone coal, spent vanadium catalyst, petroleum and asphalt waste, etc. my country is relatively rich in vanadium resources, which are mainly stored in vanadium-titanium magnetite and stone coal. Vanadium-titanium magnetite is a compound paragenetic ore, and its mineral composition is much more complex than that of ordinary iron ore. There are two main processes for extracting vanadium from vanadium-titanium magnetite: 1. Vanadium extraction process, that is, directly use vanadium-titanium magnetite with a certain proportion of sodium salt for sodium roasting to extract vanadium pen...

Claims

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Application Information

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IPC IPC(8): C01G31/02
Inventor 刘艳梅其他发明人请求不公开姓名
Owner 刘艳梅
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