91053-39-3
DIATOMACEOUS EARTH
CAS: 91053-39-3
Molecular Formula: O2Si
91053-39-3 - Names and Identifiers
91053-39-3 - Physico-chemical Properties
| Molecular Formula | O2Si |
| Molar Mass | 60.084 |
| Density | 0.47g/cm3 (loose weight)(lit.) |
| Melting Point | >300°C |
| Water Solubility | Insoluble in water. |
| Appearance | rod (1/8") |
| Color | 965 |
| Odor | Odorless |
| PH | 7.0-8.0 (25℃, 10% in aq. suspension) |
| Storage Condition | Room Temperature |
| Use | Chromatographic analysis of adsorbent, filter aid, clarifier, filler, metal catalyst carrier, fire and acid packaging materials. A poor conductor of both heat and electricity. |
91053-39-3 - Risk and Safety
| Risk Codes | R48/20 - R49 - May cause cancer by inhalation R36/37 - Irritating to eyes and respiratory system. R45 - May cause cancer |
| Safety Description | S22 - Do not breathe dust. S36 - Wear suitable protective clothing. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S53 - Avoid exposure - obtain special instructions before use. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) |
| WGK Germany | 2 |
| RTECS | VV7311000 |
| HS Code | 28112290 |
91053-39-3 - Research progress on preparation, modification and application of nano-silica
from VIP
Author:
Zhang Milin , Ding Liguo , Jing Xiaoyan , Hou Xianquan
Abstract:
nano SiO2 is an important inorganic solid material, which is of great significance for the upgrading of products in many industries. The general preparation methods of nano-sio2 are introduced, and the advantages and disadvantages of various preparation methods are reviewed. The modification mechanism is clarified, and the common modification methods are listed, the superior performance and some singular characteristics of nano-sio2 in various applications are described respectively.
Key words:
nano-sio2; Preparation; Modification; apply
DOI:
10.3969/j.issn.1009-671X.2004.06.023
cited:
year:
2004
Last Update：2024-01-02 23:10:35
91053-39-3 - Characterization and catalytic properties of Silica supported Phosphotungstic Heteropoly acid catalysts
from VIP
Author:
Winelands , Shentan , Min Enze
Abstract:
The surface properties, thermal stability, acidity and catalytic activity of different SiO2 supported Phosphotungstic acid (PW) catalysts for alkylation of benzene with propylene and 1-dodecene were studied. The results show that the dispersion of PW on SiO2 is related to the specific surface area and pore size of SiO2, and the interaction between PW and the surface of the support will directly affect the thermal stability and acidity of the supported catalyst. Different SiO2 can be used to prepare the specific surface area, pore structure and acid strength of different supported PW catalysts to meet the requirements of different catalytic reactionsKey words:
Heteropoly acid Phosphotungstic acid silica supported catalyst benzene propylene 1-dodecene alkylation
DOI:
10.3321/j.issn:0253-9837.2000.06.005
cited:
year:
2000
Last Update：2023-08-16 22:08:29
91053-39-3 - Study on infrared spectral characteristics of silica from eight different sources
from VIP
Author:
Chen and Sheng , Sun Zhenya , Shao Jingchang
Abstract:
In this paper, the infrared characteristic spectra of eight kinds of silica from different sources were compared and analyzed by Fourier transform infrared spectroscopy. The results show that the infrared spectra of eight kinds of silica from different sources are similar, but due to different formation mechanisms or synthesis methods, they have some respective infrared characteristic spectra. According to these infrared spectrum characteristic peaks, different sources of silica can be distinguished, which provides a scientific basis for the development, research and selection of silica.
Key words:
silica Different sources Fourier transform infrared spectroscopy
DOI:
CNKI:SUN:GSYT.0.2011-04-040
cited:
year:
2011
Last Update：2023-08-16 22:08:29
91053-39-3 - Preparation of nano-silica by chemical precipitation method
from VIP Journal Professional Edition
Author:
Han Jingxiang , Lijuan , zhelixin , Liu Baochun
Abstract:
nano-silica was prepared by using sodium silicate as Silicon source and ammonium chloride as precipitant. The effects of sodium silicate concentration, volume ratio of ethanol to water and pH value on the specific surface area of nano-silica powder were studied. The results show that when the concentration of sodium silicate is 0.4mol/L, the volume ratio of ethanol to water is 1:8, when the pH value is 8.5, amorphous silica nanoparticles with a particle size of 5~8nm and good dispersion can be prepared.
Key words:
precipitation method; Nano SiO2; Preparation
DOI:
CNKI:SUN:GSYT.0.2010-03-044
cited:
year:
2010
Last Update：2023-08-16 22:08:29
91053-39-3 - Preparation and characterization of monodisperse nano-silica
from VIP
Author:
symbol Yuanxiang , Sun Yanhui , GE Xingxin
Abstract:
using Stober sol-gel method, monodisperse nano-silica microspheres with the size of about 80 ~ 150nm were synthesized, and the temperature, the influence of ammonia concentration and TEOS concentration on the synthesis of silica. The samples were characterized by XRD, IR, SEM and TEM. The results show that the increase of hydrolysis temperature accelerates the maturation of silica particles in solution and causes agglomeration. The increase of ammonia concentration increases the nucleation rate and the hydrolysis rate, the particle size of silica increases, and the degree of agglomeration also increases. The increase in the amount of TEOS also resulted in a slight increase in the particle size of the silica and an increased degree of agglomeration.
Key words:
monodisperse; Nano-sio2; sol-gel method
DOI:
CNKI:SUN:GSYT.0.2008-01-036
cited:
year:
2008
Last Update：2023-08-16 22:08:29
91053-39-3 - Reference Information
| use | suitable for most filtration applications chromatographic analysis adsorbent, filter aid, clarifier, filler, metal catalyst carrier, fire and acid-proof packaging materials. Bad conductors of energy, heat and electricity. |
| EPA chemical information | information provided by: ofmpub.epa.gov (external link) |
Last Update：2024-04-09 21:54:55
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