TITANIUM DIOXIDE PRODUCTION PROCESS Russian patent published in 2006 - IPC C01G23/53 

FIELD: production of inorganic compounds.

SUBSTANCE: invention relates to production of titanium dioxide using chloride process , which is employed in radio-electronic industry to manufacture multiple types of composite ceramic materials and also employed as starting material from production of metal titanates. Synthesis of titanium dioxide having high-purity rutile modification involves thermal hydrolysis of titanium tetrachloride solution with concentration 60-70 g/dm³ TiO₂ and containing titanium nuclei and polyacrylamide in amount 100-120 g per 1 kg TiO₂ in initial solution. Hydrolysis is continued for 1.5-2 h, after which resulting titanium hydroxide is separated from filtrate, treated with 2-3% oxalic acid solution, then with distilled water, dried and calcined at 550-650^°C.

EFFECT: reduced hydrolysis process time, accelerated filtration, reduced consumption of power on heat treatment of resulting precipitate, and reduced negative environmental impact.

1 dwg, 1 tbl, 11 ex