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214396 Sigma-Aldrich

Silica gel

high-purity grade (Davisil Grade 12), pore size 22 Å, 28-200 mesh

Properties

Related Categories Analytical/Chromatography, Davisil Irregular Silica Gel, Essential Chemicals, Other Silica Gels, Research Essentials,
grade   high-purity grade (Davisil Grade 12)
mfr. no.   Davisil®
particle size   28-200 mesh
  75-650 μm
pore size   0.43 cm3/g pore volume
  22 Å
surface area   800 m2/g
bp   2230 °C
mp   >1600 °C

Description

Packaging

1 kg in poly bottle

250 g in poly bottle

5 kg in poly drum

Application

Silica gel was used to compare MCM-41 type mesoporous adsorbents.1

General description

Silica gel is a rigid 3D network of colloidal silica.2 It is exclusively used as a support material for the active titanium(III) centers in Ziegler-Natta catalysts. Silica gel allows a controlled fragmentation lresulting in the formation of uniform polymer particles with narrow particle size distribution and high bulk density.3 Silica gel is classified as below:
a. Aquagel - pores are filled with water
b. Xerogel - by the process of evaporation, aqueous phase in the pores are removed
c. Aerogel - solvent removed by supercritical extraction2

Legal Information

Davisil is a registered trademark of W.R. Grace & Co.-Conn.

Price and Availability

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