Titanium tetrachloride purification system and method

A technology of titanium tetrachloride and crude titanium tetrachloride, applied in the direction of titanium halide, etc., can solve the problems of high energy consumption, complicated process, unknown purity, etc., achieve great economic and social benefits, ensure performance indicators, and save energy. Effect

Inactive Publication Date: 2013-04-03
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example: the titanium tetrachloride rectification process reported in patent 201010297323.3 is a single-tower continuous process, which is only suitable for raw materials with less light impurity components. It is very difficult to process raw materials with complex components, and it is difficult to obtain high Pure titanium tetrachloride product; the titanium tetrachloride purification method reported in patent 2001010161513.2 has a complicated process, and the purity that the product can achieve is unknown, and the energy consumption of the whole device is also relatively large, and the process is relatively backward on the whole, so that Product quality is not stable

Method used

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  • Titanium tetrachloride purification system and method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Calculated on the basis of an annual output of 100,000 tons of titanium tetrachloride products, the feed composition is as follows: TiCl 4 99.92%, SiCl 4 0.005%, AlCl 3 0.051%, FeCl 3 0.022%, other about 0.002%.

[0021] Operating conditions of each tower in the process flow

[0022]

light tower

Weight removal tower

tower type

Packed column / plate column

Packed column / plate column

Tower diameter(mm)

1600

1600

Theoretical progression

16

16

Operating pressure at the top of the tower

Atmospheric pressure

Atmospheric pressure

Reflux ratio

60.0

1.0

[0023] Note: After the heat exchange of raw materials, the temperature of entering the tower is 115°C

[0024] The main indicators of the high-purity titanium tetrachloride product produced under the above-mentioned process conditions are as follows:

[0025]

Embodiment 2

[0027] Calculated on the basis of an annual output of 100,000 tons of titanium tetrachloride products, the feed composition is as follows: TiCl 4 99.89%, SiCl 4 0.015%, AlCl 3 0.061%, FeCl 3 0.032%, other about 0.002%.

[0028] Operating conditions of each tower in the process flow

[0029]

light tower

Weight removal tower

tower type

Packed column / plate column

Packed column / plate column

Tower diameter(mm)

1600

1600

Theoretical progression

18

18

Operating pressure at the top of the tower

Atmospheric pressure

Atmospheric pressure

Reflux ratio

70.0

1.1

[0030] Note: The temperature of the raw material entering the tower after heat exchange is 120°C

[0031] The main indicators of the high-purity titanium tetrachloride product produced under the above-mentioned process conditions are as follows:

[0032]

Embodiment 3

[0034] Calculated on the basis of an annual output of 100,000 tons of titanium tetrachloride products, the feed composition is as follows: TiCl 4 99.71%, SiCl 4 0.075%, AlCl 3 0.121%, FeCl 3 0.092%, other about 0.002%.

[0035] Operating conditions of each tower in the process flow

[0036]

[0037] Note: After the heat exchange of raw materials, the temperature of entering the tower is 125°C

[0038] The main indicators of the high-purity titanium tetrachloride product produced under the above-mentioned process conditions are as follows:

[0039]

[0040] It can be seen from the above table that the present invention is feasible, and the whole separation process not only has simple process operation, low energy consumption, but also high separation efficiency.

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Abstract

The invention relates to a titanium tetrachloride purification system and a titanium tetrachloride purification method, wherein raw titanium tetrachloride material liquid treated by a vanadium removal process is subjected to heat exchange by a preheater and then flows into the middle of a de-light rectifying tower to remove impure light components such as SiCl4 and lose a little amount of titanium tetrachloride; the material flow at the tower bottom contains rather pure titanium tetrachloride and flows into the middle of a de-heavy rectifying tower to remove heavy components such as AlCl3 and FeCl3 and lose a little amount of the titanium tetrachloride; and highly pure titanium tetrachloride is obtained at the top of the tower. The operation pressure at the top of the de-light rectifying tower is the normal pressure, the reflux ratio is 60.0-80.0, and the theoretical stage number is 16-22 in total; and the operation pressure at the top of the de-heavy rectifying tower is the normal pressure, the reflux ratio is 1.0-1.2, and the theoretical stage number is 16-22 in total. The purity of the highly pure titanium tetrachloride is at least 99.99%, and the product recycling rate in the process is higher than 97.0%.

Description

technical field [0001] The invention relates to a titanium tetrachloride purification method, in particular to a titanium tetrachloride purification system and method, and belongs to the field of titanium tetrachloride separation and purification. Background technique [0002] Titanium tetrachloride, also known as titanium chloride, English name: titanium tetrachloride, molecular formula is TiCl 4 , Soluble in cold water, ethanol, dilute hydrochloric acid. Titanium tetrachloride is a colorless or slightly yellow liquid with a pungent sour taste and fumes in the air. It is an important intermediate for preparing titanium sponge (raw material for titanium and other products) and its compounds; It is the main raw material of chlorinated titanium dioxide (used in coatings, plastics, inks, paper and cosmetics, etc.), which can be used as an important component of ethylene polymerization catalysts, and can be used to manufacture pigments and titanium organic compounds and smoke s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/02
Inventor 张吕鸿李凌桥史志强肖红刘玉花方钊张敬张志恒
Owner TIANJIN UNIV
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