Processes for water treatment

Details Processes for water treatment Processes for water treatment

2006-07-18

2006-07-18

Hruskoci, Peter A. (Department: 1724)

Liquid purification or separation

Processes

Ion exchange or selective sorption

C210S688000, C210S714000, C210S716000, C210S721000, C210S724000, C210S726000, C210S904000, C210S912000, C405S129250

Reexamination Certificate

active

07077963

ABSTRACT:
The invention provides compositions comprising bauxite refinery residues that have been reacted with sufficient calcium and magnesium ions that they have a reaction pH of less than 10.5, and one or more water treating additives. The invention also provides processes for treatment of water containing dissolved inorganic substances involving stepwise treatment of the water in which the reacted bauxite refinery residues are added after the addition of a pH-raising additive. The invention also provides processes for treatment of water containing dissolved inorganic substances in which the reacted bauxite refinery residues are added stepwise, with one or more water treating additives also being added in at least one of the steps. The invention also provides a process for the neutralisation of bauxite refinery residue by reacting it with a base amount and a treating amount of calcium ions and a base amount and a treating amount of magnesium ions for a time sufficient to produce an at least partially-neutralized residue exhibiting a reaction pH of less than 10.5.

REFERENCES:
patent: 3983210 (1976-09-01), Steintveit
patent: 4019982 (1977-04-01), Ikari et al.
patent: 4250032 (1981-02-01), Costa
patent: 4341745 (1982-07-01), Zopff et al.
patent: 4515696 (1985-05-01), Matthew et al.
patent: 5271848 (1993-12-01), Smith et al.
patent: 5766485 (1998-06-01), Lind et al.
patent: 5853677 (1998-12-01), Avotins et al.
patent: 6139753 (2000-10-01), Taylor
patent: 52453/86 (1986-07-01), None
patent: 52453 (1986-07-01), None
patent: 1088961 (2004-11-01), None
patent: 3621981 (1987-09-01), None
patent: 3621981 (1987-09-01), None
patent: 51056562 (1976-05-01), None
patent: 58003638 (1983-01-01), None
patent: 58081413 (1983-05-01), None
patent: WO 93/16003 (1993-08-01), None
patent: WO 97/41064 (1997-11-01), None
patent: WO 02/06158 (2002-01-01), None
Derwent Abstract Accession No. 50685X/27, Class D15, E33, F09, L02 JP 51-056562 A, (OJI Paper), May 18, 1976.
Derwent Abstract Accession No. 60213 K/25, Class D15, E33, JP 58-081413 A, (Central Class), May 16, 1983.
Derwent Abstract Accession No. 16330 K/07, Class E37, J01 JP 58-003638 A, (Freund Sangyo KK), Jan. 10, 1983.
Derwent Abstract Accession No. 87-250984/36, Class E36, J01 DE 3621-981-C, (Metallgesellschaft AG), Sep. 10, 1987.
Derwent Abstract Accession No. 86-190588/30, Class E33, G01, J04, M25 DE 3501-350-A, (Kali & Salz AG), Jul. 17, 1986.
Derwent Abstract Accession No. 86-191068/30, Class E33, G01, J04, M25 EP 188-268-A, (Alcoa Chemie GMBH KALS), Jul. 23, 1986.
Abstract, “Neutralization of red mud with acid,”Nippon Light Metal Co., Ltd. Japan, 1980, 1 page.
Abstract, Nagy, I., et al., “Conversion of red mud from aluminum manufacture into a raw material for fiertilizers and pigments,” 1988, 1 page.
Abstract, Zambo, J., et al., “Formation of calcium oxide and magnesium oxide compounds in the treatment of calcitic-dolometic bauxites by the Bayer method,”Femipari Kut. Intez, Budapest, Hung., 1975, 50(102), 233-251, 1page.
Abstract, Gallardo, M.M., “Neutralization of red mud from the Bayer process,”Universidade Simon Bolivar, Venez., 2002, p. 21, 1 page.
Akay, G., et al., “Phosphate removal from water by red mud using crossflow microfiltration,”Wat. Res., 1998, 32(3), 717-726.
Apak, R., et al., “Modeling of copper(II), cadmium(II), and lead(II) adsorption on red mud,”J. of Colloid and Interface Science, 1998, 203, 122-130.
“Australian firm helps clear up Romanian damage,”AIMEX, Sep. 9-12, 2003, 2 pages, down loaded Jul. 9, 2003.
Ayoub, G.M., et al., “Seawater bittern for the treatment of alkalized industrial effluents,”Wast. Res., 2000, 34(2), 640-656.
Bamonte, B., “To clean 1.5 billion litres of contaminated water,”Virotec International Ltd., http://www.asx.com.au/asx/statistics, 2000, 1 page.
Bamonte, B., “To clean 1.6 million litres of acid mine drainage water in 1 day,”Virotec International Ltd., http://www.asx.com/au/asx/statistics, 2000, 1 page.
Bamonte, B., “Progress report on Mt. Carrington tailings dam,”Virotec International Ltd., http://www.asx.com.au/asx/statistics, 2000, 2 pages.
Bamonte, B., “Tests commerce on berkleley pit water,”Virotec International Ltd., http://www.asx.com.au/asx/statistics, 2000, 1 page.
Bamonte, B., “Achieves remarkable results treatment of acid mine drainage,”Virotec International Ltd., http://www.asx.com.au/asx/statistics, 2000, 2 pages.
Bamonte, B., “Release previously highly contaminated water: APA approval,”Virotex International Ltd., http://www.asx.com.au/asx/statistics, 2000, 1 page.
Bamonte, B., “University of Wollongong confirms Virotec's AMD results,”Virotex International Ltd., http://www.asx.com.au/asx/statistics, 2000, 1 page.
Baseden, S., Environmental study of the disposal of red mud waste,Marine Pollution Bulletin, 1976, 4-7.
“Bauxsol™ Technology,”AWM Consulting, downloaded Feb. 9, 2003.
“Bauxsol tailings dam treatment,”AWM Consulting, http://web.archive.org/web, http://www.awmconsulting.com/environmental/bauxsoltailingsdamtreatment, downloaded Jan. 29, 2004, 2 pages.
Campbell, P., “A history of Bayer process presidue disposal at Gove Peninsula Northern Territory Australia,”Proceedings of the International Bauxite Tailings Workshop, 1992, 196-206.
Case Study: Mt. Carrington Tailings Dam, “An application of Viromine™ Technology,”Virotec, date unavailable, 7 pages.
Cooper, A., “Feature—Mining world seeks natural remedy for toxic waste,”ARK, 2001, 4 pages.
Craig, A., “Eurallumina spa agrees to supply red mud,”Virotec International Ltd., 2001, 1 page.
Craig, A., “Update on trials in Romania,”Virotec International Ltd., http://www.asx.com.au/asx/statistics, 2001, 1 page.
Dames & Moore, “Impact assessment study/environmental impact statement for comalco Alumina Project,” 1998, i-xxii, 1-274.
Dziubek, A.M., “High-pH coagulation-adsorption: a new technology for water treatment and reuse,”Wat. Sci. Tech., 1989, 21, 511-517.
“Further successful treatment in bala mare Romania,”Virotec International Ltd., http://www.asx.com.au/asx/statistics, 2001, 2 pages.
Geology 206.3, “Seawater Chemistry,”Earth Systems, http://www.usask.ca/geology/classes/geol1206/geol206rr2.html 2003-2004, 6 pages.
Gajsek, K., “DaVinci changes how people viewed the world,”Yahoo! Groups, http://groups.yahoo.com/group/tt-forum/message/2730, downloaded Jul. 9, 2003, 3 pages.
Glenister, D., J., et al., “Bauxite residue—development of a resource,”Proceedings of the International Bauxite Tailings Workshop, Nov. 2-6, 1992, 302-308.
Glenister, D.J., et al., “Alkalinity of red mud and its application for the management of acid wastes,”Chemeca 85: Innovation Process Resour. Ind., Aust. Chem. Eng. Conf., 13th, 1985, 109-113.
Graham, G.A., “Red mud disposal management at QAL,”Proc. International Bauxite Tailing Workshop, 1992, 188-195.
Hanahan, C., et al., “A preliminary study into the use of seawater-neutralised Bauxite refinery residues (red mud) to treat acid mine drainage,”Environmental Engineering in Australia: Opportunities and Challenges, Proceedings of the Environmental Engineering Research Event, Dec. 1998, 207-212.
Harrison, P., et al., “Options for remediation of South Lismore Lake,”Centre for Coastal Management,1998, 1-36.
“Heavy metal cleanup,”The Science Show, Broadcast Saturday Jan. 4, 2000, http://www.abc.net.au/rn/science/ss/stories/s114023.htm, 10 pages, downloaded Jan. 20, 2004.
“Indep. Scientist confirms treatment of acid mine drainage,”Virotec International Ltd., http;//www.asx.com.au/asx/statistics, 2000, 1 page.
Kilinckale, F., et al., “Solidification/stabilization of heavy metal-loaded red muds and fly ashes.

Affiliated with

Also associated with

Rating

Processes for water treatment does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Processes for water treatment, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Processes for water treatment will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3592306