详细说明
EINECS 编号 231-545-4
MDL number MFCD00011232
PubChem Substance ID 24881967
产品名称
Other Notes
Same product — same quality — now Sigma-Aldrich brand
Application
Silica gel may be used in separation of single-walled carbon nanotube (SWNT) by simple filtration.
General description
Silica gel is a rigid 3D network of colloidal silica. It is exclusively used as a support material for the active titanium (III) centers in Ziegler-Natta catalysts. Silica gel allows a controlled fragmentation leading to form uniform polymer particles with narrow particle size distribution and high bulk density. 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 extraction
法律信息
Sigma-Aldrich is a registered trademark of Sigma-Aldrich Co. LLC
性质
| grade | high-purity grade (w/ Ca, ~0.1%) |
| description | for flash chromatography |
| for preparative liquid chromatography | |
| form | powder |
| mfr. no. | Sigma-Aldrich® |
| activity acc. to Brockmann and Schodder | 2-3 |
| particle size | 230-400 mesh |
| 40-63 μm | |
| pore size | 0.8 cm3/g pore volume |
| 60 Å | |
| surface area | 500 m2/g |
| bp | 2230 °C |
| mp | >1600 °C |
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