Oxidation using a non-enzymatic free radical system mediated by redox cycling chelators
AssigneeUniversity of Maine
InventorsBarry S. Goodell, Jody L. Jellison
Life of this patent
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Abstract
Methods for oxidizing organic compounds using hydroxyl radicals formed through redox cycling chelator-mediated Fenton chemistry are disclosed. The methods include generating a reactive oxygen species by contacting a redox cycling chelator with an oxygen containing oxidant and a transition metal species. By contacting the resulting reactive oxygen species with an organic compound, the organic compound is oxidized. The preferred transition metal species is a cationic transition metal, such as iron or copper. The disclosed methods may be used to degrade organic waste compounds and dyes, activate lignocellulosic materials for bonding and produce adhesive formulations.
Claims18
A method of forming a lignocellulosic material composite article comprising:
- (a) generating a reactive oxygen species capable of oxidizing a lignocellulosic material by contacting a redox cycling chelator with an oxygen containing oxidant and a transition metal species at a pH of between 1 and 6;
- (b) contacting said lignocellulosic material with said reactive oxygen species thereby forming an oxidized lignocellulosic material whereby the lignin of the lignocellulosic material forms an adhesive;
- and (c) after step (b), applying sufficient heat and pressure to said oxidized lignocellulosic material to form said lignocellulosic material composite article.
A lignocellulosic material composite article formed by:
- a) generating a reactive oxygen species capable of oxidizing a lignocellulosic material by contacting a redox cycling chelator with an oxygen containing oxidant and a transition metal species at a pH of between 1 and 6;
- (b) contacting said lignocellulosic material with said reactive oxygen species thereby forming said oxidized lignocellulosic material whereby the lignin of the lignocellulosic material forms an adhesive;
- and (c) after step (b), applying sufficient heat and pressure to said oxidized lignocellulosic material to form said lignocellulosic material composite article.
A method of preparing an adhesive formulation comprising:
- (a) generating a reactive oxygen species capable of oxidizing a phenoxy subunit-containing organic compound by contacting a redox cycling chelator with an oxygen containing oxidant and a transition metal species at a pH of between 1 and 6;
- and (b) contacting said phenoxy subunit-containing organic compound with said reactive oxygen species thereby preparing said adhesive formulation.
An adhesive formulation prepared by:
- (a) generating a reactive oxygen species capable of oxidizing a phenoxy subunit-containing organic compound by contacting a redox cycling chelator with an oxygen containing oxidant and a transition metal species;
- and (b) contacting said phenoxy subunit-containing organic compound with said reactive oxygen species thereby preparing said adhesive formulation.
Dependencies are inferred from the claim text.