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. 22, 2017
Filed:
Feb. 19, 2008
Applicants:
Diether Koch, Mettmann, DE;
Jens Müller, Haan, DE;
Marcus Frohn, Dormagen, DE;
Inventors:
Assignee:
ASK Chemicals GmbH, Hilden, DE;
Primary Examiner:
Int. Cl.
CPC ...
C04B 35/14 (2006.01); B22C 1/00 (2006.01); C04B 35/10 (2006.01); B22C 5/06 (2006.01); B22C 5/08 (2006.01);
U.S. Cl.
CPC ...
B22C 5/06 (2013.01); B22C 5/085 (2013.01);
Abstract
The invention relates to a method for regenerating used foundry sand, which is contaminated with soluble glass, wherein: used foundry sand is provided, which is tainted with a binding agent made of the soluble glass, to which a particle-shaped metal oxide is added; and the used foundry sand is subjected to a thermal treatment, wherein the foundry sand is heated to a temperature of at least 200° C., thereby obtaining regenerated foundry sand. The invention further relates to regenerated foundry sand, as that obtained from using the method.