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:
Aug. 17, 1993
Filed:
Dec. 18, 1991
Thomas Muller, Dinslaken, DE;
Rolf-Dieter Fischer, Oberhausen, DE;
Ulrich Gerhardus, Oberhausen, DE;
Norbert Leder, Oberhausen, DE;
Klaus Poloszyk, Dorsten, DE;
Peter Schneller, Oberhausen, DE;
Wolfgang Brunke, Bottrop, DE;
Hoechst Aktiengesellschaft, , DE;
Abstract
Aqueous solutions which are contaminated by hydrogen sulfide, hydrogen cyanide, and ammonia are brought to a pH of about 3 or less after their formation and treated with an inert gas in a stripping column to remove the sulfide and cyanide. The pH of the solution is then increased to about 10 or more and the solution is again treated with an inert gas in a second stripping column to remove the ammonia.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile