Preparation of high pure gold redrock nano-titanium dioxide
A technology of nano-titanium dioxide and rutile, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of low crystallization temperature, long reaction time, co-precipitation of metal impurities, etc., achieve high efficiency, shorten heating time, and reaction time short effect
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[0017] Example: 1: Add 0.5mol / L titanium tetrachloride directly into the aqueous solution containing additives and 0.05mol hydroxylamine hydrochloride, add 0.1mol / L tetraethyl titanate to dissolve, heat for 2.5 hours and cool. The sol particles are completely rutile-type nano-titanium dioxide by XRD test. The dispersion liquid is washed, dechlorinated, concentrated and dried to obtain powder. The tested particle size is about 5nm, and the iron content is less than 5ppm.
[0018] Example: 2: Add 0.5mol / L tetraethyl titanate directly to an example aqueous solution, add 0.005mol / L hydrazine hydrate, add concentrated hydrochloric acid to dissolve until the solution is transparent, heat reaction, boil for 1.5 hours, cool, wash and dry the powder. XRD test is single rutile nano titanium dioxide, particle size is 3-7nm, after 700 sintering, 0.5-1 hour, the test particle size is 20-30nm, and the test iron content is 3-5ppm. The XRD test was completely rutile.
[0019] Example: Three...
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