Title:
METHOD FOR OBTAINING ELEMENTS OR ELEMENT COMPOUNDS FROM THE INTERMEDIATE PRODUCTS OR BY-PRODUCTS OBTAINED DURING THE PRODUCTION OF TITANIUM DIOXIDE
Document Type and Number:
WIPO Patent Application WO/2012/098126
Kind Code:
A3
Abstract:
The invention relates to the obtainment of one or more element(s) and/or element compound(s), especially rare-earth metals or compounds thereof, from intermediate products or by-products obtained during the production of titanium dioxide, especially from dilute acid, process residues and/or filter salt obtained during the production of titanium dioxide by a sulphate process. The invention particularly relates to a method whereby (a) the dilute acid obtained is reused in a circulatory process, the elements and/or element compounds being accumulated, or (b) additional compositions which contain the desired elements or compounds thereof are introduced into the sulphuric solutions used in the sulphate process.
Inventors:
AUER GERHARD (DE)
JUNG RALF P (DE)
RELLER ARMIN (DE)
PROFT BERND (DE)
JUNG RALF P (DE)
RELLER ARMIN (DE)
PROFT BERND (DE)
Application Number:
PCT/EP2012/050655
Publication Date:
November 15, 2012
Filing Date:
January 17, 2012
Export Citation:
Assignee:
SACHTLEBEN PIGMENT GMBH (DE)
AUER GERHARD (DE)
JUNG RALF P (DE)
RELLER ARMIN (DE)
PROFT BERND (DE)
AUER GERHARD (DE)
JUNG RALF P (DE)
RELLER ARMIN (DE)
PROFT BERND (DE)
International Classes:
C01B17/90; C01F17/17; C01F17/20; C01G23/053; C01G49/14; C22B3/20; C22B34/12
Foreign References:
| DE10106539A1 | 2002-08-22 | |||
| DE3329842A1 | 1985-02-28 | |||
| US6337061B1 | 2002-01-08 | |||
| EP1522522A1 | 2005-04-13 |
Attorney, Agent or Firm:
NOBBE, Matthias (Frank & NobbeReichspräsidentenstr. 21-25, Mülheim a. d. Ruhr, DE)
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