Method and apparatus for preparing titanium dioxide by oxidation reactor

An oxidation reactor, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, fibrous fillers, etc., can solve the problem of unreasonable and effective scar prevention and scar removal measures, and the material cannot withstand high temperature oxidation corrosion and erosion , unreasonable structure design of the oxidation furnace, etc., to avoid macroscopic reverse flow, strengthen the effect of gas film protection, and achieve the effect of intense momentum exchange

CN1609001AInactive Publication Date: 2005-04-27INST OF PROCESS ENG CHINESE ACAD OF SCI

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Patent Information

Authority / Receiving Office: CN · China
Current Assignee / Owner: INST OF PROCESS ENG CHINESE ACAD OF SCI
Publication Date: 2005-04-27
Estimated Expiration: Not applicable · inactive patent

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Abstract

The present invention is a two-stage heating process and apparatus for preparing titanium dioxide. The reactant material TiCl4 and O2 is prepared 400-600 deg.c and 800-1000 deg.c in the pre-heating furnace and then led into the oxidizing reactor, where atomized fuel and crystal form converting agent AlCl3 are introduced and the material is heated to 1500-1800 deg.c directly under positive pressure condition, with the product being collected with bag filter. The apparatus includes burning area, mixing reaction area with feeding ring, cooling area, material feeding pipes, cooling water inlet and outlet and cylindrical rings. The present invention his the advantages of high product quality, less scaling and long life of reactor.

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Description

technical field

[0001] The invention belongs to the technical field of preparing titanium dioxide by a chlorination method, and in particular provides a method and a device for preparing titanium dioxide in a novel oxidation reactor, which are suitable for industrialized production of titanium dioxide. technical background

[0002] Titanium dioxide is an important fine chemical product, widely used in coatings (60%), plastics (16%), papermaking (14%), ink (3%), chemical fiber, rubber, etc. (7%) industrial sectors. People's annual consumption is greater than 1.0kg, the world average is 0.45kg, while our country is only 0.04kg. Titanium dioxide production methods include sulfuric acid method and chlorination method. The sulfuric acid method is currently being gradually reduced and forced to close due to problems such as excessive waste, high energy consumption and low product quality. The general development trend of the world's titanium dioxide industry is to change from the...

Claims

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