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:
Feb. 28, 1989
Filed:
Sep. 18, 1987
Applicant:
Inventor:
C Charles Lewchalermwong, Charlotte, NC (US);
Assignee:
Mineral Research and Development Corp., Charlotte, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B / ;
U.S. Cl.
CPC ...
423395 ;
Abstract
A novel process for the manufacture of an aqueous ferric nitrate solution is provided. This process overcomes the passivation problem associated with the reaction of nitric acid and iron. The process is effected at a critical reaction temperature less than the ferric nitrate-to-ferric oxide decomposition temperature, thereby yielding a reaction product low in ferric oxide. The process involves repeated cycling of nitric acid through a bed of pieces of iron.