METHOD FOR PRODUCING AQUEOUS SOLUTION OF CHLORINATION PRODUCT OF ZIRCONIUM

WIPO Patent Application WO/2005/035446

A1

A method for producing an aqueous solution of chlorination products of zirconium which comprises: (1) the step 1 of leaching an alkali-treated zircon sand with water, followed by filtration, to prepare a water-leached cake, (2) the step 2 of adding hydrochloric acid to the water-leached cake and drying the resultant gel or of adding hydrochloric acid to the water-leached cake and spray-drying the resultant slurry before gelling, to thereby prepare a dried intermediate, (3) the step 3 of adding hydrochloric acid to the dried intermediate, to prepare a suspension, wherein the hydrochloric acid is added in such a manner that the resultant suspension has a zirconium chlorination product concentration of 5 to 16 mass % in terms of ZrO₂ and a free HCl concentration of 1 to 10 mass %, and (4) the step 4 of filtrating the above suspension to prepare the aqueous solution of chlorination products of zirconium. The above method can be employed for producing, form an alkali-treated zircon sand, an aqueous solution of chlorination products of zirconium which is reduced in a silica content, with the period of time required for the production being less than that in a conventional method.

SUGII HIROSHI (JP)
NAKAJIMA YASUSHI (JP)
KUMAKURA ATSUSHI (JP)

PCT/JP2004/015028

April 21, 2005

October 12, 2004

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DAIICHI KIGENSOKAGAKU KOGYO CO (JP)
SUGII HIROSHI (JP)
NAKAJIMA YASUSHI (JP)
KUMAKURA ATSUSHI (JP)

C01G25/04; (IPC1-7): C01G25/04

JPH06157039A	1994-06-03
JPH06127944A	1994-05-10
JPS5397997A	1978-08-26

Saegusa, Eiji (1-7-1 Doshomachi, Chuo-k, Osaka-shi Osaka, JP)

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