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:
Oct. 05, 2021
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, Aubervilliers, FR;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09C 1/30 (2006.01); C01B 33/187 (2006.01); C08L 9/06 (2006.01); C01B 33/193 (2006.01); C04B 26/04 (2006.01); C04B 40/00 (2006.01); C08K 3/36 (2006.01); C04B 111/60 (2006.01);
U.S. Cl.
CPC ...
C09C 1/3063 (2013.01); C01B 33/187 (2013.01); C01B 33/193 (2013.01); C04B 26/04 (2013.01); C04B 40/0042 (2013.01); C08K 3/36 (2013.01); C08L 9/06 (2013.01); C09C 1/30 (2013.01); C09C 1/3045 (2013.01); C09C 1/3072 (2013.01); C01P 2006/12 (2013.01); C01P 2006/22 (2013.01); C04B 2111/60 (2013.01); C08L 2205/025 (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, in the absence of an aluminium compound; wherein a mixture of polycarboxylic acids is added to the filter cake, during or after the liquefaction operation. It also relates to novel precipitated silicas and to their uses.