1 results about "Process design" patented technology

The invention discloses a method for preparing rutile type titanium dioxide powder from ammonium tetrafluorooxytitanate. The invention discloses a preparation method of a titanium dioxide photocatalyst, which belongs to the technical field of inorganic chemical industry, and comprises the following steps: S1, hydrolyzing (NH4) 2TiOF4 in strong ammonia water, filtering the hydrolyzed slurry to obtain metatitanic acid precipitate mixed with ammonia water, taking the metatitanic acid precipitate as a rutile type TiO2 precursor, concentrating the filtrate, and recovering ammonia in the concentrated filtrate; S2, adding zinc oxide into the metatitanic acid precipitate mingled with the ammonia water, and uniformly stirring and mixing the mixture; S3, carrying out first-stage calcination on the metatitanic acid precipitate mixed with zinc oxide at a set temperature to remove ammonia water and part of crystal water in the metatitanic acid precipitate; and S4, carrying out second-stage calcination transformation on the first-stage calcination product at a preset temperature to prepare the rutile type titanium dioxide powder. According to the method, the technical problems of ammonium removal, fluorine removal and calcination transformation are effectively solved; the method is reasonable in technological process design and simple to operate, and reagents can be recycled.