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:
Mar. 03, 2015
Filed:
Nov. 16, 2011
Applicants:
Andreas Huebner, Nordhausen, DE;
Alfred Schiffer, Luenen, DE;
Inventors:
Andreas Huebner, Nordhausen, DE;
Alfred Schiffer, Luenen, DE;
Assignee:
Remondis Production GmbH, , DE;
Primary Examiner:
Int. Cl.
CPC ...
C01F 11/00 (2006.01); C01D 5/16 (2006.01); C05D 1/02 (2006.01);
U.S. Cl.
CPC ...
C01D 5/16 (2013.01); C05D 1/02 (2013.01);
Abstract
A method is disclosed for treating residues from biodiesel production for the isolation of highly pure potassium sulphate from potassium sulphate-containing sludge. First, potassium sulphate-containing sludge from biodiesel production is heated in the first stage under non-oxidizing conditions to a material temperature between 400 and 700° C.; in a second stage the product from the first stage is heated under oxidizing conditions to material temperatures between 700 and 900° C.