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. 21, 1989
Filed:
Sep. 01, 1987
Applicant:
Inventor:
Andrew P Murphy, Littleton, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ;
U.S. Cl.
CPC ...
210695 ; 210717 ; 210719 ; 210902 ;
Abstract
A method of selectively removing selenium ions from an aequeous solution containing selenium ions comprises contacting the solution with an amount of ferrous ion effective to reduce the selenium ions to elemental selenium. The contacting is preferably conducted at a pH of about 9 and the ferrous ions are preferably provided in situ in the form of ferrous hydroxide. The method may further comprise removing ferric oxides to which the ferrous ions are oxidized, these ferric oxides containing the elemental selenium produced by the reduction of the selenium ions, and separating the ferric oxides from the elemental selenium by adding a strong acid thereto.