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. 06, 2004
Filed:
Aug. 28, 2003
Marc Blaauw, Maastricht, NL;
Theodorus Friederich Maria Riesthuis, Obbicht, NL;
Alex Pit, Georgia, GA (US);
Henk Oevering, Elsloo, NL;
Antonius Jacobus Franciscus Simons, Geleen, NL;
DSM N.V., Heerlen, NL;
Abstract
Process for the production of cyclohexanone oxime in which a phosphate-containing aqueous reaction medium is cycled from a hydroxylammonium synthesis zone to a cyclohexanone oxime synthesis zone and back to the hydroxylammonium synthesis zone, in which hydroxylammonium synthesis zone hydroxylammonium is formed by catalytic reduction of nitrate with hydrogen, and in which cyclohexanone oxime synthesis zone hydroxylammonium is reacted with cyclohexanone to form cyclohexanone oxime, wherein the phosphate concentration in the acqueous reaction medium entering the cyclohexanone oxime synthesis zone is higher than 3.0 mol/l.