Method of producing rutile titanium dioxide fine particles

Details Method of producing rutile titanium dioxide fine particles Method of producing rutile titanium dioxide fine particles

C - Chemistry, Metallurgy

01

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C01G 23/053 (2006.01) A61K 8/00 (2006.01) A61K 8/06 (2006.01) A61K 8/19 (2006.01) A61Q 17/04 (2006.01) C08K 9/00 (2006.01) C08L 101/00 (2006.01) C09D 7/12 (2006.01)

Patent

CA 2623627

A process for producing fine particles of rutile-form titanium oxide which highly protect against ultraviolet and have high transparency to visible rays. The process for producing fine rutile-form titanium oxide particles comprises a step (1) in which titanium dioxide hydrate is treated with at least one basic compound selected from the group consisting of the hydroxides of alkali metals and the hydroxides of alkaline earth metals and a step (2) in which the compound obtained in the step (1) is treated with a carboxylated compound and an inorganic acid.

La présente invention a trait à un procédé pour la production de fines particules d'oxyde de titane sous forme de rutile qui assurent une grande protection contre le rayonnement ultraviolet et présentent une transparence élevée au rayonnement visible. Le procédé pour la production de fines particules d'oxyde de titane sous forme de rutile comprend un étape (1) dans laquelle un hydrate de dioxyde de titane est traité avec au moins un composé basique choisi parmi le groupe constitué des hydroxydes de métaux alcalins et des hydroxydes de métaux alcalino-terreux et une étape (2) dans laquelle le composé obtenu à l'étape (1) est traité avec un composé contenant un groupe carboxyle et un acide inorganique.

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