Method and system for removing vanadium impurities in titanium tetrachloride

A technology of titanium tetrachloride and crude titanium tetrachloride, applied in titanium halide and other directions, can solve the problems of easy blockage of pipelines and heat exchangers, fast scaling of heating coils, and large area of ​​production equipment. Achieve the effect of reducing steam consumption, stable product quality and high effective utilization rate

Active Publication Date: 2014-03-05
中信钛业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In China, although the process has been continuously optimized in recent years, steam consumption has also been reduced to a certain extent, but with the expansion of the overall production capacity of titanium dioxide, the production equipment for removing vanadium from mineral oil occupies a large area, the production capacity is low, and the consumption of steam is high. The contradiction between the production capacity mismatch between the front and back processes has become increasingly prominent
[0004] Mineral oil removes vanadium, the chemical reaction efficiency is low, when the pr

Method used

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  • Method and system for removing vanadium impurities in titanium tetrachloride
  • Method and system for removing vanadium impurities in titanium tetrachloride

Examples

Experimental program
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Example Embodiment

[0023] Example 1

[0024] As shown in the figure, the system for removing vanadium impurities in titanium tetrachloride has a crude titanium tetrachloride supply tank 1. The crude titanium tetrachloride supply tank 1 passes through a pipeline and a feed port of a forced circulation pump tank 4 a is connected, the pipe between the crude titanium tetrachloride supply tank 1 and the forced circulation pump tank 4 is provided with a feed pump I2, and the discharge port c of the forced circulation pump tank 4 is connected to a heating heat exchanger 5 is connected by a pipeline. The pipeline between the forced circulation pump tank 4 and the heating heat exchanger 5 is provided with a forced circulation pump 3, and the discharge port of the forced circulation pump 3 is also connected with a mud tank 11, the The heating heat exchanger 5 is connected to the feed port e of the flash tank 6, and the discharge port f of the flash tank 6 is connected to the feed port h of the purification ...

Example Embodiment

[0034] Example 2

[0035] The system for removing vanadium impurities in titanium tetrachloride is the same as in Example 1.

[0036] During production, the specific steps are as follows:

[0037] (1) The crude titanium tetrachloride is pumped from crude titanium tetrachloride supply tank 1 into the forced circulation pump tank 4 through the feed pump I2, and the fatty acid is pumped into the forced circulation from the fatty acid supply tank 10 through the feed pump II12. In the pump tank 4, the mass ratio of the crude titanium tetrachloride to the fatty acid is 1400:1, wherein the fatty acid is an unsaturated straight-chain fatty acid with an unsaturation degree of 1 to 3 and a carbon number of 10 to 30;

[0038] (2) The forced circulation pump 3 pumps the crude titanium tetrachloride in the forced circulation pump tank 4 into the heating heat exchanger 5 through the forced circulation pump 3 to be heated to 170°C. When the heating heat exchanger is heated, the heating High-pressur...

Example Embodiment

[0045] Example 3

[0046] The system for removing vanadium impurities in titanium tetrachloride is the same as in Example 1.

[0047] During production, the specific steps are as follows:

[0048] (1) The crude titanium tetrachloride is pumped from crude titanium tetrachloride supply tank 1 into the forced circulation pump tank 4 through the feed pump I2, and the fatty acid is pumped into the forced circulation from the fatty acid supply tank 10 through the feed pump II12. In the pump tank 4, the mass ratio of the crude titanium tetrachloride to the fatty acid is 1200:1, wherein the fatty acid is an unsaturated straight-chain fatty acid with an unsaturation degree of 1 to 3 and a carbon number of 10 to 30;

[0049] (2) The forced circulation pump 3 pumps the crude titanium tetrachloride in the forced circulation pump tank 4 into the heating heat exchanger 5 through the forced circulation pump 3 to be heated to 150°C. When the heating heat exchanger is heated, the heating High-pressur...

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Abstract

The invention discloses a method and a system for removing vanadium impurities in titanium tetrachloride. The system is composed of a crude titanium tetrachloride feeding tank, a feeding pump I, a forced circulating pump, a forced circulating pump groove, a heating heat exchanger, a flask tank, a purifying tower, a condensation heat exchanger, a titanium tetrachloride storage tank, a fatty acid feeding tank, a slurry tank and a feeding pump II. The method comprises the steps: adding crude titanium tetrachloride and fatty acid into the forced circulating pump groove; then, adding the crude titanium tetrachloride and the fatty acid into the heating heat exchanger to carry out reduction reaction to obtain titanium tetrachloride slurry, wherein the titanium tetrachloride slurry contains suspended dichlorooxovanadium solids; enabling the titanium tetrachloride slurry to enter the flask tank, and carrying out flask separation; discharging dichlorooxovanadium solid contained slurry into the forced circulating pump groove, and enabling gaseous titanium tetrachloride to enter the purifying tower; and discharging the dichlorooxovanadium solid contained slurry in the purifying tower into the forced circulating pump groove, and enabling the gaseous titanium tetrachloride to enter the condensation heat exchanger to obtain the vanadium removed titanium tetrachloride. The method and system disclosed by the invention have the advantages that the equipment scaling and pipeline blocking phenomena are reduced, the productivity is improved, the energy consumption is reduced, the vanadium removal efficiency is high, and the quality of a product is stable.

Description

technical field [0001] The invention relates to a method and system for removing vanadium impurities in titanium tetrachloride. Background technique [0002] Titanium tetrachloride is the main raw material for producing sponge titanium and titanium dioxide. The quality of titanium tetrachloride will directly affect the quality of sponge titanium and titanium dioxide. Usually, vanadium exists in the form of vanadium oxytrichloride in titanium tetrachloride, and its boiling point is slightly lower than that of titanium tetrachloride. It is difficult to remove vanadium in crude titanium tetrachloride by distillation. [0003] At present, the crude titanium vanadium removal process mainly includes aluminum powder method, hydrogen sulfide method, copper wire method and organic matter method. Organic matter removal of vanadium, the process operation is relatively stable, and it is relatively easy to implement. It has been widely promoted at home and abroad in recent years, especi...

Claims

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Application Information

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IPC IPC(8): C01G23/02
Inventor 齐牧李钢仁李俊强赵庆宇赵玉泉
Owner 中信钛业股份有限公司
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