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. 18, 1999
Filed:
Apr. 10, 1997
Hossein Sharifian, Austin, TX (US);
Christopher D Shay, Stillwater, OK (US);
Sachem, Inc., Austin, TX (US);
Abstract
In one embodiment, the present invention provides a method of preparing hydroxylamine from a hydroxylammonium salt solution, including providing an electrochemical cell containing an anode, a cathode, a cation selective membrane and an anion selective membrane, wherein the cation selective membrane is positioned between the cathode and the anion selective membrane, and the anion selective membrane is positioned between the cation selective membrane and the anode, thereby defining a feed compartment between the cation selective membrane and the anion selective membrane, a recovery compartment between the cathode and the cation selective membrane, and an acid compartment between the anion selective membrane and the anode; charging a first solution to the acid compartment and a second solution the recovery compartment; charging the hydroxylammonium salt solution to the feed compartment; passing a current through the cell to produce hydroxylamine in the recovery compartment; and recovering hydroxylamine from the recovery compartment.