WO2002036504A3 - Method for cleaning blinded filter media and preventing filter blinding - Google Patents

Method for cleaning blinded filter media and preventing filter blinding Download PDF

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Publication number
WO2002036504A3
WO2002036504A3 PCT/US2001/030233 US0130233W WO0236504A3 WO 2002036504 A3 WO2002036504 A3 WO 2002036504A3 US 0130233 W US0130233 W US 0130233W WO 0236504 A3 WO0236504 A3 WO 0236504A3
Authority
WO
WIPO (PCT)
Prior art keywords
blinded
blinding
filter
cleaning
unblinding
Prior art date
Application number
PCT/US2001/030233
Other languages
French (fr)
Other versions
WO2002036504A2 (en
Inventor
Libardo A Perez
David M Polizzotti
David A Rice
Gary S Thundercliffe
Original Assignee
Hercules Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hercules Inc filed Critical Hercules Inc
Publication of WO2002036504A2 publication Critical patent/WO2002036504A2/en
Publication of WO2002036504A3 publication Critical patent/WO2002036504A3/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/66—Regeneration of the filtering material or filter elements inside the filter
    • B01D46/79—Regeneration of the filtering material or filter elements inside the filter by liquid process
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F5/00—Softening water; Preventing scale; Adding scale preventatives or scale removers to water, e.g. adding sequestering agents
    • C02F5/08—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents
    • C02F5/10—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances
    • C02F5/14—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus
    • C02F5/145—Treatment of water with complexing chemicals or other solubilising agents for softening, scale prevention or scale removal, e.g. adding sequestering agents using organic substances containing phosphorus combined with inorganic substances
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/006—Wet processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Abstract

Reducing the blinding of mineral processing filters blinded with metallic ore fines by treating the blinded filters with an aqueous solution of an unblinding agent which solubilizes at least a portion of the ore fines. Preventing blinding of the filters by metallic ore fines, by adding to the aqueous metallic ore concentrate an effective amount of an unblinding agent which solubilizes at least a portion of the metallic ore fines. Preferred unblinding agents are selected from the group consisting of water soluble organophosphonic acids, or water soluble salts thereof, and C4-C7 dicarboxylic acids.
PCT/US2001/030233 2000-11-03 2001-09-26 Method for cleaning blinded filter media and preventing filter blinding WO2002036504A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70652900A 2000-11-03 2000-11-03
US09/706,529 2000-11-03

Publications (2)

Publication Number Publication Date
WO2002036504A2 WO2002036504A2 (en) 2002-05-10
WO2002036504A3 true WO2002036504A3 (en) 2002-10-10

Family

ID=24838015

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2001/030233 WO2002036504A2 (en) 2000-11-03 2001-09-26 Method for cleaning blinded filter media and preventing filter blinding

Country Status (1)

Country Link
WO (1) WO2002036504A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070045189A1 (en) * 2005-08-31 2007-03-01 General Electric Company Acid mine water demineralization methods
EP2946005A1 (en) * 2013-01-17 2015-11-25 Archroma IP GmbH System for the removal of iron oxide from surfaces

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306991A (en) * 1979-09-18 1981-12-22 Chemed Corporation Scale inhibition
EP0313335A1 (en) * 1987-10-21 1989-04-26 Grace Dearborn Inc. Rust removal and composition therefor
EP0349681A1 (en) * 1984-08-30 1990-01-10 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
US5053161A (en) * 1988-06-10 1991-10-01 The Mogul Corporation Composition for inhibiting scale in water systems
SU1699964A1 (en) * 1990-01-03 1991-12-23 Уральский научно-исследовательский и проектный институт медной промышленности "УНИПРОМЕДЬ" Method of removing deposits from vacuum filters at concentration plants
US5078891A (en) * 1990-03-08 1992-01-07 Betz Laboratories, Inc. Method of controlling silica deposition in aqueous systems
US5078894A (en) * 1990-04-30 1992-01-07 Arch Development Corporation Formulations for iron oxides dissolution
US5288410A (en) * 1991-11-07 1994-02-22 W. R. Grace & Co.-Conn. Scale control in aqueous systems
US6063290A (en) * 1998-10-01 2000-05-16 Albright & Wilson Americas Inc. Method for controlling scale using synergistic phosphonate blends

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4306991A (en) * 1979-09-18 1981-12-22 Chemed Corporation Scale inhibition
EP0349681A1 (en) * 1984-08-30 1990-01-10 Petrolite Corporation Methods for treating hydrocarbon recovery operations and industrial waters
EP0313335A1 (en) * 1987-10-21 1989-04-26 Grace Dearborn Inc. Rust removal and composition therefor
US5053161A (en) * 1988-06-10 1991-10-01 The Mogul Corporation Composition for inhibiting scale in water systems
SU1699964A1 (en) * 1990-01-03 1991-12-23 Уральский научно-исследовательский и проектный институт медной промышленности "УНИПРОМЕДЬ" Method of removing deposits from vacuum filters at concentration plants
US5078891A (en) * 1990-03-08 1992-01-07 Betz Laboratories, Inc. Method of controlling silica deposition in aqueous systems
US5078894A (en) * 1990-04-30 1992-01-07 Arch Development Corporation Formulations for iron oxides dissolution
US5288410A (en) * 1991-11-07 1994-02-22 W. R. Grace & Co.-Conn. Scale control in aqueous systems
US6063290A (en) * 1998-10-01 2000-05-16 Albright & Wilson Americas Inc. Method for controlling scale using synergistic phosphonate blends

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Week 199242, Derwent World Patents Index; AN 1992-348144, XP002195314 *

Also Published As

Publication number Publication date
WO2002036504A2 (en) 2002-05-10

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