Membrane extraction with thermodynamically unstable diphosphonic acid derivatives

Patent · Wed Jan 01 00:00:00 EST 1997

OSTI ID:871190

Horwitz, Earl Philip ^[1]; Gatrone, Ralph Carl ^[1]; Nash, Kenneth LaVerne ^[1]

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1. Argonne, IL

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.

• Research Organization: Argonne National Laboratory (ANL), Argonne, IL (United States)
• DOE Contract Number: W-31109-ENG-38
• Assignee: Arch Development Corporation (Chicago, IL)
• Patent Number(s): US 5678242
• OSTI ID: 871190
• Country of Publication: United States
• Language: English

Related Subjects

membrane
extraction
thermodynamically
unstable
diphosphonic
acid
derivatives
thermodynamically-unstable
complexing
agents
acids
sulphur
containing
analogs
carboxyhydroxymethanediphosphonic
vinylidene-1
1-diphosphonic
capable
metal
especially
ii
iii
oxidation
form
stable
water-soluble
complexes
moderately
alkaline
highly-acidic
media
decomposed
mild
conditions
non-organic
compounds
purposes
environmentally-nondamaging
degrading
complex
releasing
disposal
recovery
methods
manufacture
described
form stable
thermodynamically unstable
water-soluble metal
complexing agents
organic compound
organic compounds
complexing agent
soluble metal
phosphonic acid
diphosphonic acid
mild conditions
sulphur containing
acid derivatives
acid derivative
acidic media
methanediphosphonic acid
thermodynamically-unstable complexing
carboxyhydroxymethanediphosphonic acid
diphosphonic acids
containing analogs
/588/423/