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Method for removing vanadium in titanium tetrachloride

A technology of titanium tetrachloride and titanium trichloride, applied in titanium halide and other directions, can solve the problems of flying into the air, aluminum powder is expensive, easy to burn, etc., and achieves the effect of improving equipment production capacity, low cost, and improved safety.

Inactive Publication Date: 2007-10-17
GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this technology is that it needs to use fine aluminum powder, which is expensive, easy to burn, easy to fly into the air, and there is a risk of explosion

Method used

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  • Method for removing vanadium in titanium tetrachloride

Examples

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Effect test

Embodiment 1

[0028] 10kg of spherical coarse aluminum powder with an average particle diameter of 142 μm was added to the surface activation processor, 20 kg of gasoline and 0.4 kg of stearic acid were added, mechanically ground for 5 hours under airtight conditions, and most of the surface active agents were removed by evaporation after grinding to obtain 10.2 kg flake aluminum powder with an average particle size of 110 μm, containing 1.5% surfactant.

Embodiment 2

[0030] Add 10kg of spherical coarse aluminum powder with an average particle size of 125μm into the surface activation processor, add 10kg of gasoline and 0.5kg of mineral oil, and mechanically grind for 7 hours under airtight conditions. After grinding, use evaporation to remove most of the surface active agent to obtain 10.2kg Flaky aluminum powder with an average particle size of 102 μm, containing 2.5% surfactant.

Embodiment 3

[0032] In 1000gTiCl 4 Add 7g AlCl to 3 and 10 g of surface-activated aluminum powder (average particle size: 110 μm), mix uniformly under mechanical stirring and heat to boiling (135° C. to 137° C.), and keep the reaction temperature for 1.5 h. The reaction produces a reddish-purple solid. After analysis, the finally formed titanium tetrachloride liquid contains TiCl in the slurry of solid titanium trichloride and aluminum trichloride (referred to as titanium trichloride slurry). 3 Content 12.6% (weight%), AlCl 3 Content 4.3% (weight %). The calculated reaction utilization rate of the aluminum powder is 75%.

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Abstract

The invention relates to a method for removing vanadium impurity from titanic tetrachloride. The invention prepares titanium trichloride serum by the reaction between the cost aluminum powders with the average grain size no bigger than 150mum after surface activation treatment. TiCl3 in the serum reduces VOCl3 in the titanic tetrachloride to be VOCl2 deposit so as to remove the vanadium. And the titanic tetrachloride after removing the vanadium contains no more than 0.0007% vanadium. The process of vanadium removal can be implemented together with rectification process in order to realize continuous operation. The invention has the advantages of simple in process, low in cost, safe in operation, high in product quality and recovery rate and simple in treating the ''three-waste'' pollution.

Description

technical field [0001] The invention relates to a method for removing vanadium impurities in titanium tetrachloride, in particular to a method for removing vanadium oxychloride impurities in titanium tetrachloride by using aluminum powder as a reducing agent. Background technique [0002] Titanium tetrachloride is the raw material for the production of sponge titanium by the Krall method and the production of titanium dioxide by the chloride method. There are many harmful impurities in the crude titanium tetrachloride produced by chlorination of titanium-containing raw materials. These impurities directly affect the quality of sponge titanium and titanium dioxide. Therefore, crude titanium tetrachloride must be purified before it can be used to produce sponge titanium and titanium dioxide. Titanium dioxide. Most of the impurities in the crude titanium tetrachloride can be separated and removed by sedimentation filtration, distillation and rectification, but the vanadium imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02
Inventor 邓国珠袁继维
Owner GENERAL RESEARCH INSTITUTE FOR NONFERROUS METALS BEIJNG
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