Title:
METHOD FOR EXTRACTION OF RUTILE
Document Type and Number:
WIPO Patent Application WO/2007/052801
Kind Code:
A1
Abstract:
The invention relates to production of lutile, which has high added value as refining raw
material for metallic titanium, white pigment, photocatalyst, or functional coating
material, with remarkably reduced energy and resource consumption as compared
with that of prior art and though simplified steps. The invention provides a method
for the extraction of rutile which comprises oxidizing ilmenite with air to convert
it into two phases, namely, rutile phase and pseudobrookite phase, dissolving
only the pseudobrookite phase in dilute sulfuric acid or dilute phosphoric acid
while recovering the lutile phase as insoluble matter, and subjecting the resulting
solution to reduction of iron ions and then hydrolysis to thus recover residual
rutile through titanic acid (TiO(OH)2).
Inventors:
NAGASAKA TETSUYA (JP)
ITOH SATOSHI (JP)
YOKOYAMA KAZUYO (JP)
NAKAJIMA KENICHI (JP)
ITOH SATOSHI (JP)
YOKOYAMA KAZUYO (JP)
NAKAJIMA KENICHI (JP)
Application Number:
PCT/JP2006/322131
Publication Date:
May 10, 2007
Filing Date:
November 07, 2006
Export Citation:
Assignee:
UNIV TOHOKU (JP)
NAGASAKA TETSUYA (JP)
ITOH SATOSHI (JP)
YOKOYAMA KAZUYO (JP)
NAKAJIMA KENICHI (JP)
NAGASAKA TETSUYA (JP)
ITOH SATOSHI (JP)
YOKOYAMA KAZUYO (JP)
NAKAJIMA KENICHI (JP)
International Classes:
C01G23/053; C22B3/04; C22B34/12
Foreign References:
| JPH03183261A | 1991-08-09 | |||
| RO114959B | ||||
| JP2005097666A | 2005-04-14 | |||
| JPH06501741A | 1994-02-24 | |||
| JPH09504828A | 1997-05-13 |
Attorney, Agent or Firm:
SHIGENOBU, Kazuo (3-28 Kioi-ch, Chiyoda-ku Tokyo 94, JP)
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