Method of Oxidization Using Nitric Acid

a technology of nitric acid and oxidizing method, which is applied in the field of oxidizing method using nitric acid, to achieve the effect of reducing thermal control problems, improving product isolation, and being readily availabl
US20100191002A1Inactive Publication Date: 2010-07-29KIELY DONALD E +1
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
KIELY DONALD E
Publication Date
2010-07-29
Estimated Expiration
Not applicable · inactive patent
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Abstract

A controlled nitric acid process employing oxygen and nitric acid as co-oxidants is used to oxidize organic compounds subject to nitric acid oxidation, to their corresponding carboxylic acids. Oxidation of some carbohydrates by this process can produce one or more of their corresponding acid forms. The process is carried out at moderate temperatures, typically in the range of 20° C. to 45° C. in a closed reactor, with oxygen gas being introduced into the reaction chamber as needed in order to sustain the reaction. Computer controlled reactors allow for careful and reproducible control of reaction parameters. Nitric acid can be recovered by a distillation / evaporation process, or by diffusion dialysis, the aqueous solution made basic with inorganic hydroxide, and the residual inorganic nitrate removed using a filtration (nanofiltration) device. The method eliminates issues of thermal control of the oxidation, release of nitrogen into the atmosphere, and post-reaction difficulties in the removal of nitric acid and inorganic nitrates.
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Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is a continuation of co-pending U.S. patent application Ser. No. 11 / 890,760, filed Aug. 6, 2007, which claims the benefits of U.S. Provisional Patent Application No. 60 / 836,329, filed Aug. 7, 2006, the disclosure of which is hereby incorporated by reference in its entirety including all figures, tables and drawings.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT

[0002] This invention was made with Government support under Grant No. 2001-344463-10521 awarded by the USDA. The Government has certain rights in the invention.REFERENCE TO SEQUENCE LISTING, A TABLE, OR A COMPUTER PROGRAM LISTING COMPACT DISC APPENDIX

[0003] Not applicable.TECHNICAL FIELD

[0004] This invention describes a method for synthesizing carbohydrate acids through controlled oxidation of their corresponding carbohydrates using nitric acid and oxygen as the oxidizing agents.BACKGROUND OF THE INVENTION

[0005] Carbohydrate acids, and in particular ca...

Claims

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