Title:
APPROACH IN CONTROLLING DSP SCALE IN THE BAYER PROCESS
Document Type and Number:
WIPO Patent Application WO/2010/117949
Kind Code:
A3
Abstract:
The invention provides a method of controlling silica in the liquor circuit of the Bayer process. The method involves addition of a promoter material to enhance the precipitation of DSP and includes adding one or more silica dispersion materials or dry silica forms to those parts of the circuit where precipitation of DSP and removal of silica from solution is desirable; for example the desilication stage of a Bayer process plant. The removal of DSP from solution reduces silica concentration in the liquor and thereby enables better control of process issues such as silica contamination in alumina product and DSP formation in later stages of the process where precipitation as scale onto vessel walls and equipment is problematical. As a result, the invention provides a significant reduction in the total cost of operating a Bayer process.
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Inventors:
LA TIMOTHY (AU)
CUI JI (US)
KILDEA JOHN D (AU)
SLINKMAN DAVID H (US)
COLEMAN KIM RICHARD (US)
CUI JI (US)
KILDEA JOHN D (AU)
SLINKMAN DAVID H (US)
COLEMAN KIM RICHARD (US)
Application Number:
PCT/US2010/029968
Publication Date:
December 16, 2010
Filing Date:
April 05, 2010
Export Citation:
Assignee:
NALCO CO (US)
LA TIMOTHY (AU)
CUI JI (US)
KILDEA JOHN D (AU)
SLINKMAN DAVID H (US)
COLEMAN KIM RICHARD (US)
LA TIMOTHY (AU)
CUI JI (US)
KILDEA JOHN D (AU)
SLINKMAN DAVID H (US)
COLEMAN KIM RICHARD (US)
International Classes:
C01F7/0606; C01F7/47
Foreign References:
| US5314626A | 1994-05-24 | |||
| US20040011744A1 | 2004-01-22 |
Other References:
BARNES M C ET AL: "THE KINETICS OF DESILICATION OF SYNTHETIC SPENT BAYER LIQUOR SEEDEDWITH PURE SODALITE, PURE CANCRINITE AND THEIR DIMORPHIC PHASE MIXTURES", LIGHT METALS 1999. PROCEEDINGS OF THE TECHNICAL SESSIONS PRESENTED BY THE TMS ALUMINUM COMMITTEE AT HTE 128TH. TMS ANNUAL MEETING, SAN DIEGO, CA FEB. 28 - MARCH 4, 1999; [PROCEEDINGS OF THE TMS ANNUAL MEETING], WARRENDALE, PA : TMS, US, vol. MEETING 128, 28 February 1999 (1999-02-28), pages 121 - 129, XP000895483, ISBN: 978-0-87339-425-3
KWAT I THE ED - CUTSHALL E R: "A NOVEL APPROACH TO POST-DESILICATING BAYER PROCESS LIQUOR", LIGHT METALS. SAN DIEGO, MAR. 1 - 5, 1992; [PROCEEDINGS OF THE TMS ANNUAL MEETING], WARRENDALE, TMS, US, vol. MEETING 121, 1 March 1992 (1992-03-01), pages 117 - 122, XP000366141
MURAKAMI M ET AL: "ASPECT OF DESILICATION KINETICS WITH RECYCLED SEED", LIGHT METALS. SAN DIEGO, MAR. 1 - 5, 1992; [PROCEEDINGS OF THE TMS ANNUAL MEETING], WARRENDALE, TMS, US, vol. MEETING 121, 1 March 1992 (1992-03-01), pages 113 - 116, XP000366140
DONALD SPITZER: "Max HT Sodalite Scale Inhibitor: Plant Experience and lmpact on the Process", LIGHT METALS 2008 : PROCEEDINGS OF THE TECHNICAL SESSIONS PRESENTED BY THE TMS ALUMINUM COMMITTEE AT THE TMS 2008 ANNUAL MEETING & EXHIBITION, NEW ORLEANS, LOUSIANA, USA, MARCH 9 - 13, 2008, MINERALS, METALS AND MATERIALS SOCIETY / ALUMINIUM COMMITTE, 9 March 2008 (2008-03-09), pages 57 - 62, XP008127812, ISBN: 978-0-87339-710-0
KWAT I THE ED - CUTSHALL E R: "A NOVEL APPROACH TO POST-DESILICATING BAYER PROCESS LIQUOR", LIGHT METALS. SAN DIEGO, MAR. 1 - 5, 1992; [PROCEEDINGS OF THE TMS ANNUAL MEETING], WARRENDALE, TMS, US, vol. MEETING 121, 1 March 1992 (1992-03-01), pages 117 - 122, XP000366141
MURAKAMI M ET AL: "ASPECT OF DESILICATION KINETICS WITH RECYCLED SEED", LIGHT METALS. SAN DIEGO, MAR. 1 - 5, 1992; [PROCEEDINGS OF THE TMS ANNUAL MEETING], WARRENDALE, TMS, US, vol. MEETING 121, 1 March 1992 (1992-03-01), pages 113 - 116, XP000366140
DONALD SPITZER: "Max HT Sodalite Scale Inhibitor: Plant Experience and lmpact on the Process", LIGHT METALS 2008 : PROCEEDINGS OF THE TECHNICAL SESSIONS PRESENTED BY THE TMS ALUMINUM COMMITTEE AT THE TMS 2008 ANNUAL MEETING & EXHIBITION, NEW ORLEANS, LOUSIANA, USA, MARCH 9 - 13, 2008, MINERALS, METALS AND MATERIALS SOCIETY / ALUMINIUM COMMITTE, 9 March 2008 (2008-03-09), pages 57 - 62, XP008127812, ISBN: 978-0-87339-710-0
Attorney, Agent or Firm:
DIMATTIA, Peter A. et al. (Naperville, Illinois, US)
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