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:
Oct. 12, 1976
Filed:
Feb. 06, 1975
Applicant:
Inventors:
Morris A Johnson, Ponca City, OK (US);
Kang Yang, Ponca City, OK (US);
Assignee:
Continental Oil Company, Ponca City, OK (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01G / ;
U.S. Cl.
CPC ...
423 43 ; 423140 ; 423144 ;
Abstract
The present invention relates to an improved process for removing iron ions from an aqueous acid solution with a minimum removal of copper ions contained therein comprising the steps of combining an organic quaternary salt with the aqueous acid solution in an amount of at least about 0.01% by weight of said solution, adjusting the pH of the solution to a value in the range of from about 2.0 to about 2.5 so that iron ions contained in the solution are hydrolyzed and precipitated and then separating the precipitate from the solution.