GB1389378A – Treatment of waste water containing hexavalent chromium and complex iron cyanides
– Google Patents
GB1389378A – Treatment of waste water containing hexavalent chromium and complex iron cyanides
– Google Patents
Treatment of waste water containing hexavalent chromium and complex iron cyanides
Info
Publication number
GB1389378A
GB1389378A
GB2035373A
GB2035373A
GB1389378A
GB 1389378 A
GB1389378 A
GB 1389378A
GB 2035373 A
GB2035373 A
GB 2035373A
GB 2035373 A
GB2035373 A
GB 2035373A
GB 1389378 A
GB1389378 A
GB 1389378A
Authority
GB
United Kingdom
Prior art keywords
waste water
complex iron
treatment
water
water containing
Prior art date
1972-08-31
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
GB2035373A
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.)
Henkel Corp
Original Assignee
Amchem Products 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.)
1972-08-31
Filing date
1973-04-30
Publication date
1975-04-03
1973-04-30
Application filed by Amchem Products Inc
filed
Critical
Amchem Products Inc
1975-04-03
Publication of GB1389378A
publication
Critical
patent/GB1389378A/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
C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
C02F1/5272—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using specific organic precipitants
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
C02F2101/16—Nitrogen compounds, e.g. ammonia
C02F2101/18—Cyanides
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
C02F2101/203—Iron or iron compound
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
C02F2101/22—Chromium or chromium compounds, e.g. chromates
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
Y10S210/903—Nitrogenous
Y10S210/904—-CN containing
Abstract
1389378 Purification of waste water AMCHEM PRODUCTS Inc 30 April 1973 [31 Aug 1972] 20353/73 Heading C1C Waste water, from the surface treatment of aluminium, containing hexavalent Cr and complex iron cyanides is purified by removing these materials by a process which comprises adding to the water an ionic compound AX the anion X of which is capable of reducing the hexavalent Cr to trivalent Cr and the cation A forms a water-insoluble precipitate with the complex iron cyanide. The trivalent Cr is removed by treating the water with alkali to precipitate (Cr(OH) 3 . The preferred salt AX is zinc dithionite.
GB2035373A
1972-08-31
1973-04-30
Treatment of waste water containing hexavalent chromium and complex iron cyanides
Expired
GB1389378A
(en)
Applications Claiming Priority (1)
Application Number
Priority Date
Filing Date
Title
US00285190A
US3819051A
(en)
1972-08-31
1972-08-31
Process for treating wastes containing chromates and/or complex iron cyanides
Publications (1)
Publication Number
Publication Date
GB1389378A
true
GB1389378A
(en)
1975-04-03
Family
ID=23093154
Family Applications (1)
Application Number
Title
Priority Date
Filing Date
GB2035373A
Expired
GB1389378A
(en)
1972-08-31
1973-04-30
Treatment of waste water containing hexavalent chromium and complex iron cyanides
Country Status (8)
Country
Link
US
(1)
US3819051A
(en)
JP
(1)
JPS5639956B2
(en)
AU
(1)
AU450942B2
(en)
BR
(1)
BR7302323D0
(en)
CA
(1)
CA997648A
(en)
DE
(1)
DE2321594C3
(en)
FR
(1)
FR2197821B1
(en)
GB
(1)
GB1389378A
(en)
Families Citing this family (13)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US3896209A
(en)
*
1973-01-22
1975-07-22
Du Pont
Reduction of hexavalent chromium
FR2283866A1
(en)
*
1974-09-09
1976-04-02
Sidic
Effluent purificn from chemical treatment of metal surfaces – using hydrosulphite ions to eliminate hexavalent chromium ions
US4072605A
(en)
*
1975-11-28
1978-02-07
Automated Medical Systems, Inc.
Method of obtaining a precipitate of metallic ions from solutions containing low concentrations of metal salts
US4374230A
(en)
*
1976-07-14
1983-02-15
El Paso Polyolefins Company
Stabilized polyolefin compositions
IT1123734B
(en)
*
1979-09-25
1986-04-30
Acna
PROCESS FOR THE REMOVAL OF TOTAL CHROME FROM THE RESIDUAL WATER OF THE DYE BATHS WITH DYEING COLORS
US4312760A
(en)
*
1980-02-19
1982-01-26
Neville Roy G
Method for the removal of free and complex cyanides from water
JPS60255192A
(en)
*
1984-06-01
1985-12-16
Kurita Water Ind Ltd
Treatment of cyan-containing waste water and chromium-containing waste water
JPH0321224Y2
(en)
*
1986-12-29
1991-05-09
US5234603A
(en)
*
1991-06-04
1993-08-10
Analytical Development Corporation
Methods employing a zirconium salt for use in wastewater treatment
DE4214974A1
(en)
*
1992-05-06
1993-11-11
Ultra Systems Gmbh Uv Oxidatio
Destruction of free and complex cyanides, AOX, mineral oil, complexing agents, COD, nitrite, chromate and separation of metals in waste water
EP2364281A4
(en)
*
2008-11-11
2015-12-23
Afrisam South Africa Pty Ltd
ADDITIVES FOR Cr (VI) REDUCTION IN CEMENT, SLAGS, MORTARS, CONCRETE, WASTE WATER AND MINING INDUSTRY WASTE
CN103725882B
(en)
*
2013-12-13
2015-06-17
东北大学
Method for extracting chromium from solution containing chromium ions and iron ions
EP3428321A1
(en)
*
2017-07-10
2019-01-16
Tata Steel IJmuiden B.V.
Method of producing an electrolyte for electrodeposition of a chromium-chromium oxide layer
Family Cites Families (5)
* Cited by examiner, † Cited by third party
Publication number
Priority date
Publication date
Assignee
Title
US2038969A
(en)
*
1934-02-01
1936-04-28
American Smelting Refining
Separating zinc and cadmium in sulphate solution
US3575853A
(en)
*
1968-12-24
1971-04-20
Lab Betz Inc
Waste water treatment
US3575854A
(en)
*
1969-04-14
1971-04-20
M & T Chemicals Inc
Rapid setiling of gelatinous precipitates
US3729413A
(en)
*
1970-04-22
1973-04-24
Nikex Nehezipari Kulkere
Process for the removal of cyanide from sewage by means of formaldehyde
US3715308A
(en)
*
1971-06-04
1973-02-06
Oxy Metal Finishing Corp
Apparatus and process for treating toxic waste materials
1972
1972-08-31
US
US00285190A
patent/US3819051A/en
not_active
Expired – Lifetime
1973
1973-02-15
AU
AU52196/73A
patent/AU450942B2/en
not_active
Expired
1973-02-26
JP
JP2304773A
patent/JPS5639956B2/ja
not_active
Expired
1973-03-05
CA
CA165,264A
patent/CA997648A/en
not_active
Expired
1973-03-30
BR
BR732323A
patent/BR7302323D0/en
unknown
1973-04-27
FR
FR7315572A
patent/FR2197821B1/fr
not_active
Expired
1973-04-28
DE
DE2321594A
patent/DE2321594C3/en
not_active
Expired
1973-04-30
GB
GB2035373A
patent/GB1389378A/en
not_active
Expired
Also Published As
Publication number
Publication date
US3819051A
(en)
1974-06-25
FR2197821B1
(en)
1976-06-11
DE2321594C3
(en)
1975-05-28
AU450942B2
(en)
1974-07-25
BR7302323D0
(en)
1974-09-24
AU5219673A
(en)
1974-07-25
CA997648A
(en)
1976-09-28
DE2321594B2
(en)
1974-09-05
DE2321594A1
(en)
1974-03-21
JPS4967444A
(en)
1974-06-29
JPS5639956B2
(en)
1981-09-17
FR2197821A1
(en)
1974-03-29
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Legal Events
Date
Code
Title
Description
1975-08-13
PS
Patent sealed [section 19, patents act 1949]
1980-03-12
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1983-05-25
732
Registration of transactions, instruments or events in the register (sect. 32/1977)
1983-12-14
PCNP
Patent ceased through non-payment of renewal fee
