Process for preparing rutile-type nano TiO2

Abstract

A rutile-type nm TiO2 is prepared from 4-valence Ti liquid whose Fe / TiO2 is 0.10-0.40 through hydrolysis by adding diluted alkali solution and crystal seeds in the said 4-valence Ti liquid, selectiveseparation, washing, dispersing, adding rutile crystal promoter, and calcine.

Description

technical field

[0001] The invention belongs to the field of nanotechnology, and more specifically relates to a production method of nano titanium dioxide powder. Background technique

[0002] Nano-titanium dioxide is widely used in many technical fields. At present, sol-gel method is widely used at home and abroad for preparation, that is, n-butyl titanate is used as raw material, and the quality of nano-titanium dioxide prepared is good, and the particle size can reach more than ten nanometers, but at a higher cost. In addition, the uniform precipitation method is adopted, that is, metatitanic acid is used as a raw material, and urea is used as a uniform precipitant for reaction, precipitation, calcining, and crushing to obtain finished products. The particle size of the produced nano-titanium dioxide is generally 50 nanometers, but due to In the prior art, the particle size of the hydrolyzed metatitanic acid is relatively large, and chemical methods need to be used to di...