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. 21, 1981
Filed:
Dec. 03, 1979
Applicant:
Inventors:
Daniel Kwasnoski, Hellertown, PA (US);
Charles J Sterner, Bethlehem, PA (US);
Russel J Horst, Bethlehem, PA (US);
Kenneth R Burcaw, Easton, PA (US);
Assignee:
Bethlehem Steel Corporation, Bethlehem, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; B01D / ;
U.S. Cl.
CPC ...
202158 ; 202176 ; 202198 ; 202234 ;
Abstract
The fouling of ammonia stills which results from the clogging, particularly of the lower plates of the stills, with sludge and precipitates is eliminated by use of combined apparatus in which a calcium compound precipitation step followed by a clarification step prior to initiation of actual distillation can be effected.