CA2113650A1 - N-ethyl hydroxamic acid chelants - Google Patents

N-ethyl hydroxamic acid chelants

Info

Publication number
CA2113650A1
CA2113650A1 CA002113650A CA2113650A CA2113650A1 CA 2113650 A1 CA2113650 A1 CA 2113650A1 CA 002113650 A CA002113650 A CA 002113650A CA 2113650 A CA2113650 A CA 2113650A CA 2113650 A1 CA2113650 A1 CA 2113650A1
Authority
CA
Canada
Prior art keywords
alkyl group
ethyl
hydroxamic acid
solutions
ethyl hydroxamic
Prior art date
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.)
Granted
Application number
CA002113650A
Other languages
French (fr)
Other versions
CA2113650C (en
Inventor
Bruce Francis Monzyk
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.)
Met Tech Systems Ltd
Original Assignee
Individual
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
Priority claimed from US07/732,989 external-priority patent/US5174917A/en
Application filed by Individual filed Critical Individual
Publication of CA2113650A1 publication Critical patent/CA2113650A1/en
Application granted granted Critical
Publication of CA2113650C publication Critical patent/CA2113650C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C259/00—Compounds containing carboxyl groups, an oxygen atom of a carboxyl group being replaced by a nitrogen atom, this nitrogen atom being further bound to an oxygen atom and not being part of nitro or nitroso groups
    • C07C259/04—Compounds containing carboxyl groups, an oxygen atom of a carboxyl group being replaced by a nitrogen atom, this nitrogen atom being further bound to an oxygen atom and not being part of nitro or nitroso groups without replacement of the other oxygen atom of the carboxyl group, e.g. hydroxamic acids
    • C07C259/06—Compounds containing carboxyl groups, an oxygen atom of a carboxyl group being replaced by a nitrogen atom, this nitrogen atom being further bound to an oxygen atom and not being part of nitro or nitroso groups without replacement of the other oxygen atom of the carboxyl group, e.g. hydroxamic acids having carbon atoms of hydroxamic groups bound to hydrogen atoms or to acyclic carbon atoms
    • 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
    • C22B3/00—Extraction of metal compounds from ores or concentrates by wet processes
    • C22B3/20—Treatment or purification of solutions, e.g. obtained by leaching
    • C22B3/26—Treatment or purification of solutions, e.g. obtained by leaching by liquid-liquid extraction using organic compounds
    • C22B3/32—Carboxylic acids
    • 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

N-ethyl alkanohydroxamic acids, where said alkyl group is a straight chain alkyl group of 8 to 10 carbon atoms, or a branched alkyl group of 8 to 18 carbon atoms, provided said alkyl group is not cyclic, useful as metal chelants for use an organic solvent extractant solutions such as kerosene to extract metals from aqueous solutions by forming complexes of the extracted me-tal with the N-ethyl hydroxamic acid. Metals can be stripped from complexes of N-ethyl hydroxamic acids at higher concentra-tions into lower strength acid stripping agents. The N-ethyl hydroxamic acid-containing organic solvent extraction solutions exhi-bit rapid phase separation from aqueous solutions, good hydrolytic stability and resistance to forming emulsions.
CA002113650A 1991-07-19 1992-07-02 N-ethyl hydroxamic acid chelants Expired - Lifetime CA2113650C (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US07/732,989 US5174917A (en) 1991-07-19 1991-07-19 Compositions containing n-ethyl hydroxamic acid chelants
US890,882 1992-05-29
US07/890,882 US5328626A (en) 1991-07-19 1992-05-29 N-ethyl hydroxamic acid chelants
US732,989 1992-05-29
PCT/US1992/005622 WO1993002047A1 (en) 1991-07-19 1992-07-02 N-ethyl hydroxamic acid chelants

Publications (2)

Publication Number Publication Date
CA2113650A1 true CA2113650A1 (en) 1993-02-04
CA2113650C CA2113650C (en) 2002-11-26

Family

ID=27112501

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002113650A Expired - Lifetime CA2113650C (en) 1991-07-19 1992-07-02 N-ethyl hydroxamic acid chelants

Country Status (7)

Country Link
US (2) US5328626A (en)
EP (1) EP0598747B1 (en)
JP (1) JP3292730B2 (en)
AT (1) ATE137216T1 (en)
CA (1) CA2113650C (en)
DE (1) DE69210245T2 (en)
WO (1) WO1993002047A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5328626A (en) * 1991-07-19 1994-07-12 Met-Tech Systems, Ltd. N-ethyl hydroxamic acid chelants
US8747789B2 (en) * 2010-04-06 2014-06-10 Nalco Company Metal scavenging polymers

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3821351A (en) * 1971-06-03 1974-06-28 Kerr Mc Gee Corp Solvent extraction of metal ions using n-substituted hydroxamic acids
US4975253A (en) * 1983-12-27 1990-12-04 Monsanto Company Solvent extraction of nickel using hydroxamic acids
US4604407A (en) * 1985-04-04 1986-08-05 E. R. Squibb & Sons, Inc. Hydroxamates
US5030427A (en) * 1986-12-04 1991-07-09 Monsanto Company Gallium purification
US4741887A (en) * 1986-12-04 1988-05-03 Monsanto Company Gallium complexes and solvent extraction of gallium
US4874539A (en) * 1987-08-06 1989-10-17 American Cyanamid Company Carboxy hydroxamic acid polymers and their use as detergent additives
US5328626A (en) * 1991-07-19 1994-07-12 Met-Tech Systems, Ltd. N-ethyl hydroxamic acid chelants
US5174917A (en) * 1991-07-19 1992-12-29 Monsanto Company Compositions containing n-ethyl hydroxamic acid chelants

Also Published As

Publication number Publication date
DE69210245D1 (en) 1996-05-30
JPH06509114A (en) 1994-10-13
ATE137216T1 (en) 1996-05-15
US5487842A (en) 1996-01-30
EP0598747B1 (en) 1996-04-24
WO1993002047A1 (en) 1993-02-04
CA2113650C (en) 2002-11-26
JP3292730B2 (en) 2002-06-17
US5328626A (en) 1994-07-12
DE69210245T2 (en) 1996-10-31
EP0598747A1 (en) 1994-06-01

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry
MKEX Expiry

Effective date: 20120702