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    UPGRADING TITANIFEROUS MATERIALS
    64.
    发明专利
    UPGRADING TITANIFEROUS MATERIALS 未知

    公开(公告)号：CA2137812C

    公开(公告)日：2004-11-23

    申请号：CA2137812

    申请日：1993-08-12

    Applicant: TECH RESOURCES PTY LTD

    Inventor： HOLLITT MICHAEL JOHN ,  MCCLELLAND ROSS ALEXANDER ,  TUFFLEY JOHN ROGER

    IPC: C22B1/02 ,  C22B3/04 ,  C22B34/12

    Abstract: The application discloses a process for upgrading a titaniferous material by removal of impurities contained in the material especially radionuclides. The process involves heating the titaniferous material to a temperature of less than 1300 .degree. C to form a solid titaniferous phase and a liquid oxide or glassy phase in the presence of a material that promotes the formations of such phases, cooling the product at a rate that maintains the glassy phase in an amorphous state and leaching the solidified material with an acid or an alkali to remove the impurities. Materials that promote t he formation of the desired phases include compounds of alkali metals and boron. Examples include borax, caustic soda, soda ash a nd silica.

    66.
    发明专利
    未知

    公开(公告)号：NO964326L

    公开(公告)日：1996-12-10

    申请号：NO964326

    申请日：1996-10-11

    Applicant: TECH RESOURCES PTY LTD

    Inventor： HOLLITT MICHAEL JOHN

    IPC: C01G23/04 ,  C22B3/04 ,  C22B3/14 ,  C22B34/12 ,  C22B3/12 ,  C22B3/22 ,  C22B3/44 ,  C01G23/047 ,  C01G23/053

    Abstract: PCT No. PCT/AU95/00213 Sec. 371 Date Jan. 6, 1997 Sec. 102(e) Date Jan. 6, 1997 PCT Filed Apr. 13, 1995 PCT Pub. No. WO95/28503 PCT Pub. Date Oct. 26, 1995A process for alkaline leaching of a titaniferous material containing silica and alumina impurities in which spent leachant is recycled by treating to remove the silica and alumina impurities therefrom, by heating, maintaining the leachant at leaching temperature, or treating with an additive. The removal of the silica and alumina impurities by the method of the invention enables further use of the leachant.

    70.
    发明专利
    未知

    公开(公告)号：NO954419L

    公开(公告)日：1995-12-15

    申请号：NO954419

    申请日：1995-11-03

    Applicant: TECH RESOURCES PTY LTD

    Inventor： HOLLITT MICHAEL JOHN ,  MCCLELLAN ROSS ALEXANDER

    IPC: C22B34/12 ,  C22B3/06 ,  C22B3/08 ,  C22B3/12 ,  C22B3/10 ,  C22B5/12

    Abstract: PCT No. PCT/AU94/00241 Sec. 371 Date Apr. 1, 1996 Sec. 102(e) Date Apr. 1, 1996 PCT Filed May 9, 1994 PCT Pub. No. WO94/26944 PCT Pub. Date Nov. 24, 1994A process for removing impurities from a titaniferous material that has been subjected to thermal reduction and which includes a titaniferous phase of general formula M3O5. The thermally reduced titaniferous material is subjected to a secondary heat treatment to covert the M3O5 phase to a more readily leachable M2O3 phase. This material is then cooled and leached in an aqueous acid solution containing hydrochloric acid or sulfuric acid, and the leachate is separated from the titaniferous material to form a purified titaniferous material.

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