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:
Jan. 04, 1994
Filed:
Mar. 15, 1993
Applicant:
Inventors:
William J Mazzafro, Schnecksville, PA (US);
Stephen I Clarke, Macungie, PA (US);
Philip N Taylor, Bethlehem, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C01B / ;
U.S. Cl.
CPC ...
203 12 ; 159 171 ; 159 471 ; 159D / ; 159D / ; 202174 ; 202176 ; 203 22 ; 203 49 ; 203 73 ; 203 95 ; 203D / ; 423522 ; 423526 ; 423531 ;
Abstract
A process for the purification and concentration of sulfuric acid contained with nitric acid by-products and organic components pursuant to the mixed acid nitration of aromatics. The process resides in the integration of a purification system with a concentration system which includes: