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US 4,393,038 AGranted
Hydrogen peroxide production
AssigneeAtlantic Richfield Company
InventorsHsiang-ning Sun, John J. Leonard, Harold Shalit
Life of this patent
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Abstract
Hydrogen is diffused through a palladium-containing membrane into an aqueous solution containing ions of a stabilizing nature and containing dissolved oxygen to form hydrogen peroxide. Some water is formed as a by-product. The hydrogen peroxide may be identified and/or recovered from said aqueous solution in an identification zone.
Claims3
A method of preparing aqueous solution of hydrogen peroxide which method consists of:
- providing a slightly acidic aqueous solution containing ions tending to stabilize hydrogen peroxide and substantially free from ions catalyzing the decomposition of hydrogen peroxide;
- dissolving oxygen in said aqueous solution;
- positioning a first surface of a predominantly palladium membrane metallic structure in contact with said aqueous solution containing dissolved oxygen;
- controlling the pressure of a hydrogen stream so that hydrogen is supplied to the surface opposite said first surface of said metallic structure at a rate at least equal to the diffusion rate of hydrogen through said membrane;
- controlling the temperature of said aqueous solution and said metallic structure to be within the range from 10.degree.-150.degree. C., whereby the hydrogen diffusing to said first surface surface of said membrane reacts with dissolved oxygen to form a reaction mixture consisting of hydrogen peroxide and water plus said aqueous solution;
- directing a stream of said reaction mixture to a recovery zone appropriate for the recovery of the thus produced hydrogen peroxide.
3 more elements
Dependencies are inferred from the claim text.