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. 09, 2022
Filed:
Feb. 12, 2015
Applicant:
Rhodia Operations, Paris, FR;
Inventors:
Cédric Boivin, Chasselay, FR;
Laurent Guy, Rillieux-la-Pape, FR;
Eric Perin, Villefranche sur Saône, FR;
Kilani Lamiri, L'Arbresle, FR;
Assignee:
RHODIA OPERATIONS, Paris, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C08K 3/36 (2006.01); C04B 26/02 (2006.01); C09C 1/30 (2006.01); C01B 33/193 (2006.01); C04B 14/06 (2006.01); C01B 33/187 (2006.01); C04B 111/60 (2006.01);
U.S. Cl.
CPC ...
C08K 3/36 (2013.01); C01B 33/187 (2013.01); C01B 33/193 (2013.01); C04B 14/066 (2013.01); C04B 26/02 (2013.01); C09C 1/30 (2013.01); C09C 1/309 (2013.01); C09C 1/3045 (2013.01); C09C 1/3063 (2013.01); C01P 2002/54 (2013.01); C01P 2002/82 (2013.01); C01P 2002/87 (2013.01); C01P 2006/12 (2013.01); C01P 2006/22 (2013.01); C01P 2006/82 (2013.01); C04B 2111/60 (2013.01); C08K 2201/006 (2013.01);
Abstract
The invention relates to a process for the preparation of a novel precipitated silica, wherein: a silicate is reacted with an acidifying agent, so as to obtain a silica suspension; said silica suspension is filtered, so as to obtain a filter cake; said filter cake is subjected to a liquefaction operation, optionally in the presence of an aluminium compound; wherein at least one polycarboxylic acid is added to the filter cake, during or after the liquefaction operation. It also relates to a novel precipitated silica and to its uses.