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Patent number: 6264909Abstract: An improved process for either the manufacturing of nitric acid, recycling of nitric acid, or recovering of nitric acid, comprising the steps of: providing a source of NOx; reacting NO from the source of NOx with HNO3 in the presence of NO2− to produce a resulting product; and reacting the resulting product with O2 and H2O to produce nitric acid.Type: GrantFiled: June 15, 1999Date of Patent: July 24, 2001Assignee: Drinkard Metalox, Inc.Inventor: William F. Drinkard, Jr.