Titanium tetrachloride purification system and method

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...

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

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