silica gel fine-pored lump - Names and Identifiers
silica gel fine-pored lump - Physico-chemical Properties
Molecular Formula | mSiO2·nH2O
|
Physical and Chemical Properties | Colorless or pale yellow hard glassy transparent or translucent particles. Insoluble in water and inorganic acid, soluble in hydrofluoric acid and concentrated caustic soda solution. High mechanical strength and good wear resistance. Under the condition of low relative humidity, it has strong adsorption capacity for water vapor and selective adsorption of some harmful substances in the medium. |
silica gel fine-pored lump - Introduction
Fine-porous bulk silica gel is a solid material with a fine pore structure, usually in the form of blocks or particles. Its main properties are as follows:
1. High specific surface area: Fine-porous bulk silica gel has a very high specific surface area, which can provide a large amount of adsorption surface, thereby increasing the opportunity for molecular adsorption and reaction.
2. Regulation of pore structure: The pore structure of silica gel can be controlled by different preparation methods and processing conditions, including pore size, pore distribution, etc., to meet different application requirements.
3. Adsorption performance: fine porous block silica gel has strong adsorption performance, which can adsorb and separate gas, moisture, solvent and various organic compounds.
The main uses of fine porous block silica gel include:
1. Desiccant: Due to its strong moisture absorption capacity, it can be used as an air desiccant to absorb and remove moisture in humid air.
2. Separating agent: Due to its strong adsorption performance, it can be used to separate and purify chemicals and separate components in mixtures.
3. Catalyst carrier: Due to its large specific surface area and the ability to regulate the pore structure, it can be used as a catalyst carrier to improve the efficiency and selectivity of the catalytic reaction.
The preparation methods of fine-pore bulk silica gel mainly include sol-gel method, hydrothermal method, gas phase method, etc. Among them, the sol-gel method is one of the commonly used preparation methods, which is prepared by mixing silicon precursor and solvent, gelation, drying, calcination and other steps.
Regarding the safety information of fine-pore block silica gel, the following points should be noted:
1. Pore block silica gel is a non-toxic, tasteless material, no direct harm to the human body.
2. In the use of fine hole block silica gel, need to pay attention to avoid direct contact with the eyes and skin, to prevent irritation or allergic reactions. In case of contact, rinse with plenty of water.
3. Pay attention to the transportation and storage safety of the fine-pore block silica gel to avoid moisture and contact with other substances.
Generally speaking, fine-porous bulk silica gel is a kind of functional material, which has important application value in the fields of drying, separation and catalysis, but it still needs to follow the corresponding safety measures when using it.
Last Update:2024-04-10 22:41:56