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Oxidation reactor for preparing titanium white through chlorination process, and method

A technology of oxidation reactor and chlorination method, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of prolonging the time of full mixing and affecting the particle size distribution of titanium dioxide, so as to prevent formation and blockage and reduce corrosion With the possibility of scarring, the effect of reducing requirements

Inactive Publication Date: 2007-02-21
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This feeding method makes the primary titanium dioxide particles located in the axis of the reactor, and will not be close to the side wall to cause scarring, but it prolongs the time for the two reaction gases to fully mix
This feeding method makes oxygen and titanium tetrachloride gas need to go through a long development period to achieve sufficient molecular mixing, which will seriously affect the particle size distribution of titanium dioxide particles

Method used

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  • Oxidation reactor for preparing titanium white through chlorination process, and method
  • Oxidation reactor for preparing titanium white through chlorination process, and method
  • Oxidation reactor for preparing titanium white through chlorination process, and method

Examples

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example 1

[0033] The shell of the development zone of the oxidation reactor of the present invention is a gradually expanding cone with a taper α of 8 degrees. The gap between the cooling jacket and the titanium tetrachloride delivery pipe is 3mm, and there are 10 nozzles on the side wall of the nozzle, in:

[0034] Fuel gas: Toluene

[0035] Oxygen temperature entering the reaction chamber after combustion: 1500°C

[0036] Titanium tetrachloride and aluminum trichloride: Temperature: 450°C

[0037] Mass ratio of titanium tetrachloride to aluminum trichloride: 100:1

[0038] Cooling gas A: Oxygen, temperature: 25°C

[0039] Cooling gas B: Chlorine, temperature: 25°C

[0040] Operating under the same conditions, there is no scarring in the reactor, the working surface in the furnace is smooth, and the particle size and particle size distribution of the product can be adjusted according to the length of the reactor.

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Abstract

This invention discloses oxidation reactor and method for preparing TiO2 by chlorination. The reactor comprises a combustion chamber, a shell of reacting zone, and a shell of developing zone. A TiCl4 inflow pipe is inserted vertically into the shell of the reacting zone, and is bent 90 degrees to form an L-shaped pipe towards the shell of the developing zone. A nozzle is fixed on the end of the L-shaped pipe, and on the same axis of the shells. A cool air entrance is at the connecting part of the shells. The right side of the shell of the developing zone is connected with the flow exit. The tangential and radial TiCl4 cyclone jets can be formed at the axes to mix TiCl4 gas and hot oxygen and react fast and uniformly. The mixing effect can be ameliorated by controlling the relative momentum of the TiCl4 jet. Cool air is applied to blow the nozzle to prevent blockage. The cool air introduced from the connecting part of the shells is applied to control the rection, reduce and scar formation on the reactor wall, and adjust the particle size distribution.

Description

technical field [0001] The invention belongs to the field of high temperature chemical reaction equipment. In particular, it relates to an oxidation reactor for preparing titanium white by a chlorination method and a method thereof. Background technique [0002] Titanium dioxide (TiO2) 2 ), is a widely used inorganic functional material. Nanoscale titanium dioxide has the advantages of large specific surface area, high surface activity, good light absorption performance, and strong ultraviolet absorption ability. It is widely used, and the rutile titanium dioxide with a diameter of 200-300nm has the broadest market demand. At present, there are mainly two methods for producing this rutile titanium dioxide: sulfuric acid method and chlorination method. The chlorination method has become the mainstream technology in the international titanium dioxide industry due to its advantages of short process, high product quality, low pollution and high degree of automation. and deve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047
Inventor 程易刘喆魏飞金涌
Owner TSINGHUA UNIV
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