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:
Apr. 03, 1979
Filed:
Oct. 28, 1977
Fred W Koff, Long Valley, NJ (US);
Allen A Tunick, Boonton, NJ (US);
Stylianos Sifniades, Madison, NJ (US);
Allied Chemical Corporation, Morris Township, Morris County, NJ (US);
Abstract
A process for separating hydroxylamine from an aqueous solution thereof also containing salts of cations whose corresponding free bases have base dissociation constants greater than 10.sup.-7. Said solution is brought to a pH of 6-11 and is passed through a bed of strongly ionic exchange resin loaded with compensating ions whereby hydroxylamine is retained in the gel volume of the resin bed and the ions in solution are substantially excluded from the resin. The ionic salts accordingly move faster through the bed and predominate in a first effluent fraction and the hydroxylamine appears predominantly in a later effluent fraction. Hydroxylammonium salts can be crystallized from the effluent hydroxylamine solution after addition of a stoichiometric amount of an appropriate acid.