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:
Apr. 07, 1981
Filed:
May. 26, 1978
Applicant:
Inventors:
William J Didycz, Whitehall Borough, PA (US);
Donald Glassman, Mount Lebanon Borough, PA (US);
Edward E Maier, Plum Borough, PA (US);
George T Saniga, Penn Hills Township, Allegheny Count, PA (US);
Assignee:
United States Steel Corporation, Pittsburgh, PA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C02F / ; B01D / ;
U.S. Cl.
CPC ...
203 22 ; 203 11 ; 203 25 ; 203 26 ; 203 36 ; 203 37 ; 203 79 ; 203 80 ; 203 92 ; 423357 ;
Abstract
A process is described for the removal of acid gases and ammonia from dilute aqueous solutions. This is achieved by two separate and successive distillations. In the first distillation, substantially all of the acid gases and free ammonia are removed. In the second distillation, substantially all of the fixed ammonia is removed. Exemplary aqueous solutions are waste waters from coke oven and coal conversion plants.