Method for producing redox-active Ti(IV) coordination compounds
OwnerGuoyi Fu, Malcolm G. Goodmaninventors
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Abstract
A method for producing an aqueous solution of a redox-active coordination compound of a transition metal which can be used directly as an electrolyte in a flow battery wherein the method comprises reacting a freshly precipitated hydrous transition metal oxide with a chelating agent and a base in an aqueous reaction medium to produce a solution of the corresponding redox-active transition metal coordination compound.
Claims7
A method for producing a redox-active coordination compound of a transition metal selected from the group consisting essentially of titanium, aluminum, chromium, iron, vanadium, manganese, cerium, and uranium which comprises:
- (a) precipitating a soluble salt of the transition metal with a base in an aqueous reaction medium to form freshly precipitated hydrous transition metal oxide;
- (b) separating the freshly precipitated hydrous transition metal oxide from the aqueous reaction medium;
- and
- (c) reacting the freshly precipitated hydrous transition metal oxide with a chelating agent and a base in a second aqueous reaction medium to produce a solution of the corresponding redox-active transition metal coordination compound.
A method for producing a Ti(IV) redox-active coordination compound which comprises:
- (a) precipitating a metalloorganic compound of titanium with water to form freshly precipitated hydrous titanium oxide;
- (b) separating the freshly precipitated hydrous titanium oxide from the aqueous reaction medium;
- and
- (c) reacting the freshly precipitated hydrous titanium oxide with a chelating agent and a base in a second aqueous reaction medium to produce a solution of the corresponding redox-active Ti(IV) coordination compound.
Dependencies are inferred from the claim text.