The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 10, 2001
Filed:
Oct. 12, 2000
Kerry L. Wagaman, Bryantown, MD (US);
The United States of America as represented by the Secretary of the Navy, Washington, DC (US);
Abstract
The present invention comprises a process of producing HAN by slowly adding nitric acid to an alcoholic solution of hydroxylamine. This forms a precipitate of solid HAN. However, if more nitric acid is added, the precipitate dissolves before the stoichiometric amount of acid has been added. Therefore, sufficient nitric acid is added to form a maximum amount of solid HAN precipitate. The solid HAN is then isolated by conventional means such as filtration or centrifugation, possibly preceded by chilling this solution. The excess alcoholic solution of unreacted hydroxylamine may be recycled and used as starting material in the process.