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:
May. 29, 2018
Filed:
Oct. 02, 2015
Applicant:
Omya International Ag, Oftringen, CH;
Inventors:
Joe Wenk, Kingsport, TN (US);
George Saunders, Brandon, VT (US);
Marc Maurer, Village-Neuf, FR;
Mathieu Skrzypczak, Terrace Park, OH (US);
Assignee:
Omya International AG, Oftringen, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C01F 11/18 (2006.01); D21H 17/67 (2006.01); D21H 19/38 (2006.01);
U.S. Cl.
CPC ...
C01F 11/181 (2013.01); C01F 11/18 (2013.01); D21H 17/675 (2013.01); D21H 19/385 (2013.01); C01P 2004/03 (2013.01); C01P 2004/39 (2013.01); C01P 2004/52 (2013.01); C01P 2004/61 (2013.01); C01P 2006/12 (2013.01);
Abstract
The present invention provides a process for preparing a precipitated calcium carbonate product. The process comprises the steps of preparing slaking quick lime to obtain slaked lime; and subjecting the slaked lime, without agitation, without prior cooling in a heat exchanger, and in the absence of any additives, to carbonation with carbon dioxide gas to produce PCC. The newly prepared product develops better performance thanks to improved resistance during processing.