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:
May. 13, 1980
Filed:
Oct. 04, 1978
Fred W Koff, Long Valley, NJ (US);
Allen A Tunick, Boonton, NJ (US);
Stylianos Sifniades, Madison, NJ (US);
Reed H Belden, Bernardsville, NJ (US);
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
Abstract
A process for separating hydroxylamine from an aqueous solution containing hydroxylammonium salts in mixture with salts of predominantly monovalent cations whose corresponding free bases have base dissociation constants greater than 10.sup.-7. Said solution is passed through a bed of cation exchange resin loaded predominantly with monovalent cations whereby hydroxylammonium and the other cations in solution substantially displace said cations from the resin. A second aqueous solution containing a monovalent amine or hydroxide base of at least 0.5 molar concentration having a dissociation constant greater than 10.sup.-7 is passed through the resin bed whereby hydroxylamine is preferentially released to the solution and the resin is correspondingly loaded with the cation of said base. Hydroxylammonium salts can be crystallized from the solution after addition of a stoichiometric amount of an appropriate acid.