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Title: Membrane extraction with thermodynamically unstable diphosphonic acid derivatives

Abstract

Thermodynamically-unstable complexing agents which are diphosphonic acids and diphosphonic acid derivatives (or sulphur containing analogs), like carboxyhydroxymethanediphosphonic acid and vinylidene-1,1-diphosphonic acid, are capable of complexing with metal ions, and especially metal ions in the II, III, IV, V and VI oxidation states, to form stable, water-soluble metal ion complexes in moderately alkaline to highly-acidic media. However, the complexing agents can be decomposed, under mild conditions, into non-organic compounds which, for many purposes are environmentally-nondamaging compounds thereby degrading the complex and releasing the metal ion for disposal or recovery. Uses for such complexing agents as well as methods for their manufacture are also described. 1 fig.

Inventors:
; ;
Issue Date:
Research Org.:
Univ. of Chicago, IL (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
541723
Patent Number(s):
5,678,242
Application Number:
PAN: 8-250,001
Assignee:
Arch Development Corp., Chicago, IL (United States) PTO; SCA: 540220; PA: EDB-97:142241; SN: 97001865596
DOE Contract Number:  
W-31109-ENG-38
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 14 Oct 1997
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CHELATING AGENTS; METALS; PHOSPHONIC ACIDS; DECOMPOSITION; MATERIALS RECOVERY; WASTE DISPOSAL; USES; CHEMICAL PREPARATION

Citation Formats

Horwitz, E.P., Gatrone, R.C., and Nash, K.L. Membrane extraction with thermodynamically unstable diphosphonic acid derivatives. United States: N. p., 1997. Web.
Horwitz, E.P., Gatrone, R.C., & Nash, K.L. Membrane extraction with thermodynamically unstable diphosphonic acid derivatives. United States.
Horwitz, E.P., Gatrone, R.C., and Nash, K.L. Tue . "Membrane extraction with thermodynamically unstable diphosphonic acid derivatives". United States.
@article{osti_541723,
title = {Membrane extraction with thermodynamically unstable diphosphonic acid derivatives},
author = {Horwitz, E.P. and Gatrone, R.C. and Nash, K.L.},
abstractNote = {Thermodynamically-unstable complexing agents which are diphosphonic acids and diphosphonic acid derivatives (or sulphur containing analogs), like carboxyhydroxymethanediphosphonic acid and vinylidene-1,1-diphosphonic acid, are capable of complexing with metal ions, and especially metal ions in the II, III, IV, V and VI oxidation states, to form stable, water-soluble metal ion complexes in moderately alkaline to highly-acidic media. However, the complexing agents can be decomposed, under mild conditions, into non-organic compounds which, for many purposes are environmentally-nondamaging compounds thereby degrading the complex and releasing the metal ion for disposal or recovery. Uses for such complexing agents as well as methods for their manufacture are also described. 1 fig.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1997},
month = {10}
}