Abstract: The invention relates to a reducing agent for the soluble chromate content of cement and to methods for the production thereof, which comprise concentrating an used sulfuric acid, containing iron (II) sulfate, and separating the sulfuric acid from the obtained precipitate which contains iron (II) sulfate.
Type:
Grant
Filed:
February 13, 2012
Date of Patent:
August 19, 2014
Assignee:
Crenox GmbH
Inventors:
Michael Vössing, Auer Gerhard, Benno Laubach, Detlef Klein, Werner Schuy, Klaus Köllisch, Erwin Weiss, Werner Bahl, Philip Reese
Abstract: A process for producing a coating material for coating welding electrodes and/or for producing a welding powder which can be used in an electric welding, such as in an under-powder welding, a welding powder additive, and/or a flux additive, includes obtaining a titanium-containing by-product or waste product, such as a titanium dioxide-containing material, in at least one of a production step and a production stage during a titanium dioxide production process, such as a titanium dioxide pigment production process. The titanium-containing by-product or waste product is added and/or mixed into a coating material, a welding powder, a welding powder additive, and/or a flux additive so as to obtain a titanium-containing material mixture. The titanium-containing material mixture is processed so as to provide the coating material, the welding powder, the welding powder additive, and/or the flux additive.
Type:
Application
Filed:
December 27, 2010
Publication date:
November 29, 2012
Applicant:
CRENOX GMBH
Inventors:
Hans-Juergen Oexl, Gerhard Auer, Horst Guennel, Michael Voessing, Sascha Dyschy, Norbert Merkle, Martin Offermann