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:
Dec. 13, 1977
Filed:
Jun. 14, 1976
Applicant:
Inventors:
Assignee:
Stamicarbon, B.V., Geleen, NL;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423387 ; 423 56 ; 423 58 ; 423306 ;
Abstract
An improved process for preparing a hydroxyl-amine salt by reduction of a solution of nitrate ions or nitrogen monoxide. Dissolved molybdenum in amounts as low as about two milligrams per liter of nitrate/nitrogen monoxide solution are known to interfere with the reduction reaction. The present invention provides a simple method of reducing molybdenum contamination, and hence enhancing the efficiency of the reduction reaction. Dissolved molybdenum is removed from the nitrate/nitrogen monoxide solution by coprecipitation with a complex iron-ammonium phosphate. If chromium is present, it will also be removed by this coprecipitation.