摘要 |
<p>The present 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 60° to 90° 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.</p> |
申请人 |
COUNCIL OF SCIENTIFIC & INDUSTRIAL RESEARCH |
发明人 |
JASRA, RAKSH, VIR;MODY, HARESH, MAHIPATLAL;SOMANI, RAJESH, SHANTILAL;BAJAJ, HARI, CHAND;SHUKLA, DIPAK, BALWANTRAI;VYAS, NIRAJ, RAMESHCHANDRA |