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:
Jun. 18, 1996
Filed:
Apr. 21, 1995
Karl-Heinz Funken, Bonn, DE;
Oliver Weinmann, Hamburg, DE;
Karl-Friedrich Knoche, Aachen, DE;
Rudolf Sizmann, Munich, DE;
Deutsche Forschungsanstalt fur Luft-und Raumfahrt e.V., Cologne, DE;
Abstract
A process for recycling waste sulfuric acid by decomposing organic contaminants by use of light energy, comprising exposing a waste sulfuric acid containing contaminants to a focused radiation emission having an irradiation intensity within the range of from 0.01 to 100 MW/m.sup.2 in a reaction chamber shaped as a directly-absorbing receiver, wherein the chamber is maintained at a temperature within the range of from 200.degree. C. to 1000.degree. C. to form sulfur trioxide and water as sulfuric acid decomposition products. The process also includes forming sulfur dioxide and oxygen, starting materials for sulfuric acid, by cleavage of the decomposition product sulfur trioxide by maintaining the reaction chamber at a temperature between 400.degree. C. and 1500.degree. C. The process, particularly adapted for irradiations with direct solar radiation.