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. 28, 1992
Filed:
Feb. 22, 1991
Applicant:
Inventors:
Joseph C Catlin, Hanahan, SC (US);
Margaret D Ellis, Mt. Pleasant, SC (US);
James J Good, Charleston, SC (US);
Mark A Putnam, Hanahan, SC (US);
Neal E Tonks, Hanahan, SC (US);
Donald V Wood, Goose Creek, SC (US);
Assignee:
Miles Inc., Pittsburgh, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ;
U.S. Cl.
CPC ...
210715 ; 75726 ; 204150 ; 210719 ; 210724 ; 210737 ; 210912 ;
Abstract
This invention relates to a process for removing copper ions from highly acidic waste water generated during the manufacture of dyes or pigments or intermediates thereof. The waste water is exposed at a pH less than about 1 to a bed of suspended iron particles, preferably a fluidized bed of iron particles, having a particle size of from about 200 to about 950 micrometers.