GB1457528A – Extracrion of heavy metals from industrial waste waters
– Google Patents
GB1457528A – Extracrion of heavy metals from industrial waste waters
– Google Patents
Extracrion of heavy metals from industrial waste waters
Info
Publication number
GB1457528A
GB1457528A
GB5862073A
GB5862073A
GB1457528A
GB 1457528 A
GB1457528 A
GB 1457528A
GB 5862073 A
GB5862073 A
GB 5862073A
GB 5862073 A
GB5862073 A
GB 5862073A
GB 1457528 A
GB1457528 A
GB 1457528A
Authority
GB
United Kingdom
Prior art keywords
heavy metals
waste water
dec
suspension
ferrous ions
Prior art date
1972-12-19
Legal status (The legal status 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 status listed.)
Expired
Application number
GB5862073A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
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.)
1972-12-19
Filing date
1973-12-18
Publication date
1976-12-01
1972-12-19
Priority claimed from JP12781672A
external-priority
patent/JPS5122307B2/ja
1972-12-20
Priority claimed from JP12866672A
external-priority
patent/JPS5139940B2/ja
1973-04-10
Priority claimed from JP4117273A
external-priority
patent/JPS5336712B2/ja
1973-12-18
Application filed by Nippon Electric Co Ltd
filed
Critical
Nippon Electric Co Ltd
1976-12-01
Publication of GB1457528A
publication
Critical
patent/GB1457528A/en
Status
Expired
legal-status
Critical
Current
Links
Espacenet
Global Dossier
Discuss
Classifications
C—CHEMISTRY; METALLURGY
C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F1/00—Treatment of water, waste water, or sewage
C02F1/72—Treatment of water, waste water, or sewage by oxidation
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01D—SEPARATION
B01D21/00—Separation of suspended solid particles from liquids by sedimentation
B01D21/0009—Settling tanks making use of electricity or magnetism
B—PERFORMING OPERATIONS; TRANSPORTING
B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
B—PERFORMING OPERATIONS; TRANSPORTING
B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
B03C1/00—Magnetic separation
B03C1/005—Pretreatment specially adapted for magnetic separation
B03C1/015—Pretreatment specially adapted for magnetic separation by chemical treatment imparting magnetic properties to the material to be separated, e.g. roasting, reduction, oxidation
C—CHEMISTRY; METALLURGY
C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F1/00—Treatment of water, waste water, or sewage
C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
C—CHEMISTRY; METALLURGY
C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F1/00—Treatment of water, waste water, or sewage
C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
C—CHEMISTRY; METALLURGY
C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F1/00—Treatment of water, waste water, or sewage
C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
C—CHEMISTRY; METALLURGY
C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
C02F2101/00—Nature of the contaminant
C02F2101/10—Inorganic compounds
C02F2101/20—Heavy metals or heavy metal compounds
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
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S210/00—Liquid purification or separation
Y10S210/902—Materials removed
Y10S210/911—Cumulative poison
Y10S210/912—Heavy metal
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
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S210/00—Liquid purification or separation
Y10S210/902—Materials removed
Y10S210/911—Cumulative poison
Y10S210/912—Heavy metal
Y10S210/913—Chromium
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
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S210/00—Liquid purification or separation
Y10S210/902—Materials removed
Y10S210/911—Cumulative poison
Y10S210/912—Heavy metal
Y10S210/914—Mercury
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
Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y10S423/00—Chemistry of inorganic compounds
Y10S423/01—Waste acid containing iron
Abstract
1457528 Removing heavy metals from waste water NIPPON ELECTRIC CO Ltd 18 Dec 1973 [19 Dec 1972 20 Dec 1972 10 April 1973] 58620/73 Headings C1A and C1C A method of extracting heavy metals from waste water containing ferrous ions in an amount of at least twice the molar amount of all heavy metals other than iron, comprises the steps of adding alkali to the waste water in an amount of 0À9-1À2 equivalents of acid radical contained in the waste water to form a suspension of hydroxides of ferrous ions and/or the other heavy metals, bubbling an oxidizing gas into the suspension to stir up and at the same time to oxidize the suspension, whereby crystals containing ferric ions and further containing and/or adsorbing the heavy metal ions originally contained in the waste water are precipitated and separating the precipitated crystals to obtain clear water from which heavy metals have been extracted. An initial addition of ferrous ions may be made to waste water which contains no or insufficient ferrous ions. Alkaline waste water is treated without the step of alkali addition. The precipitated crystals may include ferromagnetic crystals which may be separated with a magnet. Heavy metals having a smaller ionization potential than iron may be removed by plating metallic iron added to the waste water. The heavy metals exemplified include Cr, Cd Pb Cu, Ni, Bi and Hg.
GB5862073A
1972-12-19
1973-12-18
Extracrion of heavy metals from industrial waste waters
Expired
GB1457528A
(en)
Applications Claiming Priority (3)
Application Number
Priority Date
Filing Date
Title
JP12781672A
JPS5122307B2
(en)
1972-12-19
1972-12-19
JP12866672A
JPS5139940B2
(en)
1972-12-20
1972-12-20
JP4117273A
JPS5336712B2
(en)
1973-04-10
1973-04-10
Publications (1)
Publication Number
Publication Date
GB1457528A
true
GB1457528A
(en)
1976-12-01
Family
ID=27290739
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB5862073A
Expired
GB1457528A
(en)
1972-12-19
1973-12-18
Extracrion of heavy metals from industrial waste waters
Country Status (5)
Country
Link
US
(1)
US3931007A
(en)
CA
(1)
CA1017083A
(en)
DE
(1)
DE2363291A1
(en)
FR
(1)
FR2210574B1
(en)
GB
(1)
GB1457528A
(en)
Cited By (1)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2206342A
(en)
*
1987-06-30
1989-01-05
Raymond Leonard Sukovieff
Process and apparatus for the purification of water
Families Citing this family (65)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
IT1008297B
(en)
*
1974-02-25
1976-11-10
Montedison Spa
PROCEDURE FOR OBTAINING MAGNETITE FROM FERROUS SULPHATE SOLUTIONS
US4169053A
(en)
*
1975-08-08
1979-09-25
Nippon Electric Co., Ltd.
Method of treating waste waters containing solid-phase difficultly-soluble compounds
IT1064085B
(en)
*
1976-07-02
1985-02-18
Anic Spa
METHOD FOR THE THICKENING OF MERCURY PARTICLES
DE2642198C3
(en)
*
1976-09-20
1980-01-17
Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt
Process for the separation of Cd + + ions from waste water and aqueous solutions
DE2642238C3
(en)
*
1976-09-20
1980-01-17
Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler, 6000 Frankfurt
Process for the separation of Cu + + ions from wastewater and aqueous solutions
JPS5452862A
(en)
*
1977-08-25
1979-04-25
Blue Circle Ind Ltd
Method of removing heavy metal by silicate
US4211646A
(en)
*
1977-10-31
1980-07-08
Texaco Inc.
Waste water process
US4137293A
(en)
*
1977-12-16
1979-01-30
Ishihara Sangyo Kaisha, Ltd.
Producing gypsum and magnetite from ferrous sulfate and separating
NL7802123A
(en)
*
1978-02-25
1979-08-28
Akzo Nv
PROCEDURE FOR REMOVING HEAVY METALS FROM Aqueous SUBSTANCES.
US4197117A
(en)
*
1978-11-20
1980-04-08
Kennecott Copper Corporation
Recovery of copper by ferrous ion precipitation
FR2466282A1
(en)
*
1979-10-02
1981-04-10
Commissariat Energie Atomique
METHOD FOR REMOVING HEAVY METALLIC ELEMENTS SUSPENDED IN A LIQUID USING A FINALLY DIVIDED FERROMAGNETIC ADJUVANT
US4330511A
(en)
*
1980-03-17
1982-05-18
Peter F. Loftus Corporation (Illinois)
Treatment of blast furnace off-gas
US4465597B2
(en)
*
1981-08-10
1997-07-01
Tetra Tech
Treatment of industrial wastewaters
DE3380033D1
(en)
*
1982-06-22
1989-07-13
Seitetsu Kagaku Co Ltd
Process for removal and recovery of mercury from waste water
US4525254A
(en)
*
1982-10-07
1985-06-25
Gosudarstvenny Nauchno-Issledovatelsky I Proektny Institut Po Obogascheniju Rud Tsvetnykh Metallov “Kazmekhanobr”
Process and apparatus for purifying effluents and liquors
CA1223375A
(en)
*
1982-10-13
1987-06-23
Colin W.A. Muir
Treating cyanide-containing effluents
WO1984003692A1
(en)
*
1983-03-21
1984-09-27
Union Oil Co
Method for removing heavy metals from aqueous solutions by coprecipitation
US5045214A
(en)
*
1983-03-21
1991-09-03
Union Oil Company Of California
Methods for removing substances from aqueous solutions
DE3574165D1
(en)
*
1984-01-12
1989-12-14
Pelt & Hooykaas
A method of processing waste materials, particularly a sludge containing noxious metals
JPS60206481A
(en)
*
1984-03-30
1985-10-18
Kawasaki Steel Corp
Recovery treatment of waste stainless steel pickling solution
EP0160496B1
(en)
*
1984-04-28
1989-09-13
Toda Kogyo Corp.
Magnetic iron oxide particles
DE3417629C1
(en)
*
1984-05-12
1985-01-24
Th. Goldschmidt Ag, 4300 Essen
Process for the production of basic copper carbonate
US4543189A
(en)
*
1984-06-13
1985-09-24
Bethlehem Steel Corp.
Removal of complexed zinc-cyanide from wastewater
US4606829A
(en)
*
1984-06-13
1986-08-19
Bethlehem Steel Corporation
Removal of complexed zinc-cyanide from wastewater with improved sludge stability
US4668124A
(en)
*
1985-04-22
1987-05-26
Engelhard Corporation
Disposal of material containing vanadium as landfill
US4652381A
(en)
*
1985-07-22
1987-03-24
Farmland Industries, Inc.
Battery plant waste water treatment process
US4680126A
(en)
*
1986-02-18
1987-07-14
Frankard James M
Separation and recovery of reusable heavy metal hydroxides from metal finishing wastewaters
US4724084A
(en)
*
1986-03-28
1988-02-09
The Boeing Company
System for removing toxic organics and metals from manufacturing wastewater
WO1989009192A1
(en)
*
1988-03-31
1989-10-05
Commonwealth Scientific And Industrial Research Or
Hydrometallurgical effluent treatment
US5104550A
(en)
*
1988-08-19
1992-04-14
Solarchem Enterprises Inc.
Oxidation and photooxidation process
SE466496B
(en)
*
1989-05-09
1992-02-24
Solvator Process Ab
PROCEDURE FOR PURIFICATION OF ORGANIC MATERIAL
US5106508A
(en)
*
1990-09-26
1992-04-21
Klaus Schwitzgebel
Integrated process for cyanide and heavy metal removal from plating process waste streams
US5087370A
(en)
*
1990-12-07
1992-02-11
Clean Harbors, Inc.
Method and apparatus to detoxify aqueous based hazardous waste
FR2688208B1
(en)
*
1992-03-06
1994-08-26
Promaiga
DEVICE FOR DISCHARGING SLUDGE PRESENT IN A CIRCUIT, ESPECIALLY FOR HEATING.
US5292435A
(en)
*
1992-09-28
1994-03-08
Klaus Schwitzgebel
Equipment and process for solid waste minimization in chromium and heavy metal removal from groundwater
US5312549A
(en)
*
1993-02-12
1994-05-17
Clean Harbors, Inc.
Method and apparatus for extracting organic liquids from an organic liquid solute/solvent mixture
US5330658A
(en)
*
1993-03-17
1994-07-19
Westinghouse Electric Corporation
Solution decontamination method using precipitation and flocculation techniques
US5370800A
(en)
*
1993-05-25
1994-12-06
Stevenson; Sanford M.
Method for removing metal compounds from waste water
US7335309B1
(en)
*
1993-05-25
2008-02-26
Stevenson Sanford M
Method for removing metal compounds from waste water
US6117314A
(en)
*
1993-05-25
2000-09-12
Stevenson; Sanford M.
Apparatus for removing metal compounds from waste material
US5505857A
(en)
*
1994-01-13
1996-04-09
Buckman Laboratories International, Inc.
Process for the treatment of metal-containing water and recovery of metals therefrom
US5472618A
(en)
*
1994-02-07
1995-12-05
Great Western Chemical Company
Method for recovering metals from solutions
SE504959C2
(en)
*
1995-03-03
1997-06-02
Kemira Kemi Ab
Process for the purification of metal-containing solutions containing iron and zinc salts
US5685993A
(en)
*
1995-06-30
1997-11-11
Pitts-Mont Environmental Reclamation Corporation
Apparatus and method for ferrite formation and removal of heavy metal ions by ferrite co-precipitation from aqueous solutions
JP3739480B2
(en)
*
1995-10-31
2006-01-25
栗田工業株式会社
Treatment method of flue gas desulfurization waste water
DE19545660C1
(en)
*
1995-12-07
1997-04-10
Karlsruhe Forschzent
Removing heavy metals from waste water using ferri- or ferromagnetic particles
DE19641465A1
(en)
*
1996-10-09
1998-04-16
Schloemann Siemag Ag
Method and device for cleaning and processing of coolants and / or lubricants used in the metallurgical industry
US6238571B1
(en)
1998-09-15
2001-05-29
Massachusetts Institute Of Technology
Removal of contaminant metals from waste water
JP2001107258A
(en)
*
1999-10-06
2001-04-17
Hitachi Ltd
Electroless copper plating method, plating device and multilayer wiring board
EP1328477B1
(en)
*
2000-09-26
2011-03-30
LANXESS Deutschland GmbH
Contact and adsorber granulates
CN1216807C
(en)
*
2000-09-26
2005-08-31
拜尔公司
Contacting and adsorbent granules
DE50115834D1
(en)
*
2000-09-26
2011-05-12
Lanxess Deutschland Gmbh
CONTACT AND ADSORBER GRANULES
US20020074292A1
(en)
*
2000-09-26
2002-06-20
Andreas Schlegel
Adsorption vessels
US6596182B1
(en)
*
2001-02-02
2003-07-22
The Regents Of The University Of California
Magnetic process for removing heavy metals from water employing magnetites
US7074336B1
(en)
*
2001-06-20
2006-07-11
Sandia Corporation
Inorganic ion sorbents and methods for using the same
US6800260B2
(en)
*
2002-02-11
2004-10-05
Millennium Inorganic Chemicals, Inc.
Processes for treating iron-containing waste streams
TW593164B
(en)
*
2003-07-30
2004-06-21
Min-Shing Tsai
Integrated technology in sequential treatment of organics and heavy metal ions wastewater
JP4412936B2
(en)
*
2003-07-31
2010-02-10
パナソニック株式会社
Cobalt oxyhydroxide, method for producing the same, and alkaline storage battery using the same
DK200500694A
(en)
*
2005-05-12
2006-11-13
Microdrop Aqua Aps
Process and plant for removing pollutants, especially arsenic, from water
US9255023B2
(en)
*
2012-04-17
2016-02-09
Water Solutions, Inc.
Treatment of contaminated impound water
WO2016065015A1
(en)
*
2014-10-21
2016-04-28
Hmsolution Inc.
Removal of contaminants from a fluid involving in-situ generation of adsorption filtration media or reactive components
CN105668754A
(en)
*
2016-03-10
2016-06-15
湘潭大学
Method for removing trace of heavy metal and nonmetal impurities in waste acid cleaning liquor
US20180273410A1
(en)
*
2017-03-24
2018-09-27
Gopher Resource, LLC
System and method for water treatment
US10968126B2
(en)
2017-07-07
2021-04-06
Katz Water Tech, Llc
Pretreatment of produced water to facilitate improved metal extraction
CN110987841A
(en)
*
2019-12-31
2020-04-10
浙江瑞启检测技术有限公司
Detection method for heavy metal in waste soil
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2232295A
(en)
*
1938-07-14
1941-02-18
Charles H Lewis
Process for treating liquids
US3347787A
(en)
*
1965-08-30
1967-10-17
Rhodes John Cecil
Process of purifying or recovering mine drainage waters and the like
GB1142215A
(en)
1966-02-21
1969-02-05
Nippon Electric Co
Improvements in or relating to ferrite particles and process for manufacturing same
US3575854A
(en)
*
1969-04-14
1971-04-20
M & T Chemicals Inc
Rapid setiling of gelatinous precipitates
US3617559A
(en)
*
1970-04-30
1971-11-02
Us Interior
Neutralization of ferrous iron-containing acid wastes
1973
1973-12-17
US
US05/425,123
patent/US3931007A/en
not_active
Expired – Lifetime
1973-12-18
GB
GB5862073A
patent/GB1457528A/en
not_active
Expired
1973-12-18
CA
CA188,441A
patent/CA1017083A/en
not_active
Expired
1973-12-18
FR
FR7345305A
patent/FR2210574B1/fr
not_active
Expired
1973-12-19
DE
DE2363291A
patent/DE2363291A1/en
not_active
Ceased
Cited By (2)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
GB2206342A
(en)
*
1987-06-30
1989-01-05
Raymond Leonard Sukovieff
Process and apparatus for the purification of water
GB2206342B
(en)
*
1987-06-30
1992-01-29
Raymond Leonard Sukovieff
Process and apparatus for the purification of water
Also Published As
Publication number
Publication date
US3931007A
(en)
1976-01-06
FR2210574A1
(en)
1974-07-12
FR2210574B1
(en)
1978-11-10
DE2363291A1
(en)
1974-06-27
CA1017083A
(en)
1977-09-06
Similar Documents
Publication
Publication Date
Title
GB1457528A
(en)
1976-12-01
Extracrion of heavy metals from industrial waste waters
HUT36502A
(en)
1985-09-30
Method for the process of ferrous and zincous hydrochloric acid pickles
US4317804A
(en)
1982-03-02
Process for the selective removal of ferric ion from an aqueous solution containing ferric and other metal ions
JPS6427648A
(en)
1989-01-30
Method of refining alkaline solution
GB1246300A
(en)
1971-09-15
Refining of zinc
ATE166328T1
(en)
1998-06-15
METHOD FOR TREATING WASTE WATER CONTAINING THALLIUM
DE69804016D1
(en)
2002-04-04
OXIDIZING LIQUIDIZATION OF FERROUS CABINET SLAVE WITH REMOVAL OF ZINC AND LEAD
GB1499577A
(en)
1978-02-01
Process for purifying aqueous solutions of metal ions precipitating as arsenides
SE9500775L
(en)
1996-09-04
Purification of metal-containing solutions
AU563373B2
(en)
1987-07-09
Eliminating iron from leach solutions
JPS6430693A
(en)
1989-02-01
Treatment of water containing ferrocyano complex
Bhattacharyya et al.
1984
Sulfide Precipitation of Heavy Metals: Effect of Complexing Agents
NL7404782A
(en)
1974-10-14
Removal of heavy metal impurities from aq effluents – by adding alkalis and introducing oxidg. gas to ppte ferromagnetic iron cpds, absorbing heavy metals, and removing these cpds magnetically
JPS5561997A
(en)
1980-05-10
Treatment method for chemical cleaning waste water
JPS51136502A
(en)
1976-11-26
Recovery of heavy metals from sludge after treatment of plating waste
JPS52105573A
(en)
1977-09-05
Treatment of acid washing waste liquid
JPS55128595A
(en)
1980-10-04
Removal of selenium eluted from decoppering liquid of anode slime of copper electrolysis
Mishra et al.
1996
Biosorption of heavy metal ions by penicillium sp. A case study
JPS5231921A
(en)
1977-03-10
Treating method of oxide ore containing iron
JPS5492594A
(en)
1979-07-21
Removing method for heavy metals in aqueous solution of ferrous chloride
FR2447403A1
(en)
1980-08-22
Cobalt recovery from low cobalt, high iron, oxide slag – by mixing with molten ferrous metal to produce ferro-cobalt
JPS5465198A
(en)
1979-05-25
Recovering method for iron ions
JPS5238472A
(en)
1977-03-25
Process for treating sludge of mixed metals
JPS51149189A
(en)
1976-12-21
Process for separation of metallic ions
JPS5788010A
(en)
1982-06-01
Separation of selenium and tellurium from acidic aqueous solution
Legal Events
Date
Code
Title
Description
1977-04-14
PS
Patent sealed [section 19, patents act 1949]
1994-01-19
PE20
Patent expired after termination of 20 years
Effective date:
19931217
