Aluminium trichloride reactor

Abstract

The invention relates to the field of preparation of titanium dioxide by a chlorination process, and discloses an aluminium trichloride reactor. The aluminium trichloride reactor comprises a reaction cavity, a discharge hatch, a first inlet pipe used for introducing chlorine and aluminium powder, and a second inlet pipe used for introducing titanium tetrachloride gas, the first inlet pipe is vertically arranged at the bottom center of the reaction cavity, the top of the first inlet pipe extends to the central section of the reaction cavity, the bottom extends out of the reaction cavity, the bottom of the first inlet pipe is connected with an aluminium powder feeding pipe, the second inlet pipe is connected with the bottom of the reaction cavity, and the discharge hatch is arranged at the top of the reaction cavity. In the aluminium trichloride reactor, the aluminium powder is conveyed to the central section of the reactor through chlorine, is uniformly dispersed in the reactor, and is fully and thoroughly reacted with chlorine, so that the utilization rate of chlorine and aluminium powder can be effectively increased.

Description

technical field [0001] The invention relates to the field of titanium dioxide preparation by a chloride method, in particular to an aluminum trichloride reactor. Background technique [0002] Oxidation is one of the most critical technologies in the production process of chloride titanium dioxide. During the oxidation process, titanium tetrachloride reacts with oxygen to produce anatase titanium dioxide and rutile titanium dioxide. Generally, the product is anatase titanium dioxide. Type and rutile mixed crystal titanium dioxide coexist. Then adding aluminum trichloride under oxidation process conditions can convert the product into a single rutile titanium dioxide. Therefore, the addition of aluminum trichloride is directly related to the conversion rate of rutile titanium dioxide. In the production process of titanium dioxide, aluminum trichloride is usually prepared by reacting aluminum powder and chlorine gas in an aluminum trichloride reactor. While generating aluminu...

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Problems solved by technology

[0003] In the existing aluminum trichloride reactor, aluminum powder is usually added to the aluminum trichloride reactor from the side by means of pulsed gas injection. This method of adding aluminum powder will easily lead to uneven distribution of aluminum powder and fluctuations in the amount of aluminum powder Larger, it is not conducive to the smooth and sufficient reaction, and will cause a considerable part of unreacted aluminum powder to be output from the outlet with the airflow

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