IN287457: Process for the manufacture of finely divided precipitated silica
Abstract
The invention provides a process for the preparation of finely divided precipitated silica. Finely divided precipitated silica is prepared by neutralization of alkali silicate solution, under continuous stirring, at 60o to 900 C in presence of alkali metal salt as coagulating agent, in various neutralization steps during which neutralization is interrupted for specific time. Further acidic silica sol, is added until 60 to 80% of total alkali is neutralized. The reaction mixture is then aged at least for 3 minute under continuous agitation, followed by circulation through centrifugal pump at an appropriate rate.
Filing Date:
03-05-2007
Issue Date:
18-09-2017
Applicant:
CSIR-Central Salt Marine Chemicals Research Institute (CSIR-CSMCRI), Bhavnagar
Patent No:
IN287457
Application No:
0954DEL2007
Inventor(s):
Raksh Vir Jasra; Hareh Mahiptalal Mody; Rajesh Shantilal Somani; Hari Chand Bajaj; Dipak Balwantrai Shukla; Niraj Ramesh
IPC Classification:
C01B33/143
Country:
India
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