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. 18, 2015
Filed:
Mar. 21, 2013
Applicant:
Rhodia Operations, Paris, FR;
Inventors:
Sylvaine Neveu, Paris, FR;
Anne-Laure Pinault, Antony, FR;
Assignee:
RHODIA OPERATIONS, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C01B 33/193 (2006.01); C01B 33/12 (2006.01);
U.S. Cl.
CPC ...
C01B 33/128 (2013.01); C01B 33/193 (2013.01);
Abstract
A process for preparing precipitated silica, in which a silicate is reacted with an acidifying agent in order to obtain a suspension of precipitated silica (S), followed by: a separation step in order to obtain a cake, a cake-disintegration step in order to obtain a suspension of precipitated silica (S), and a suspension drying step. According to the invention, a membrane concentration step is performed between the disintegration step and the drying step.