Views: 0 Author: Site Editor Publish Time: 2023-12-26 Origin: Site
Acetone is a colorless and transparent liquid at room temperature. It is volatile, flammable and has a slightly fragrant odor. It can dissolve oil, fat, resin, rubber, cellulose acetate and cellulose nitrate, etc. It can be dissolved in water and is an important volatile organic solvent. Flammable, it is a polar solvent that can interact with other polar or partially polar solutes due to the carbonyl group in its molecule. These properties make acetone widely used in industry and laboratories, especially as a solvent and reaction intermediate. However, due to its volatility and flammability, it needs to be handled with caution. Acetone solvent is widely used in industry and is often used in the manufacturing of coating adhesives, cleaning and decontamination in the electronics industry, chemical synthesis and printing ink solvents.
Deep drying and water removal
1. Acetone solution is sensitive to moisture. The reaction between acetone and water will form hydrates, which will affect the properties and uses of acetone.
2. In the industrial manufacturing process, there are strict requirements on the purity and moisture content of acetone solvent. The presence of moisture can cause unexpected reactions in production, affecting the quality of the final product. Therefore, to ensure the effectiveness of acetone in industrial applications, the purity and stability of the acetone feedstock should be maintained.
How to remove water from general solvents
1. Add a layered dehydrating agent such as sodium hydroxide or calcium hydroxide to the solution to precipitate and separate the water.
2. Remove water from the acetone solution by boiling distillation.
3. Pass the inert gas through the acetone solution to allow the gas to take away the moisture.
4. Use desiccant to absorb, such as anhydrous sodium sulfate, silica gel, molecular sieve, etc., directly add it to the acetone solution, adsorb the water to the desiccant, and then separate the desiccant.
From the perspective of industrial application, molecular sieve adsorbents have the best drying effect, the lowest cost, and the best overall benefits.
1. Simple operation:
Molecular sieves have precise selective adsorption properties. Molecular sieves can selectively adsorb water molecules without affecting the presence of acetone molecules.
2. High adsorption efficiency:
Molecular sieves have very high adsorption capacity and can achieve efficient removal of moisture in a relatively short period of time.
3. High adsorption accuracy:
After the molecular sieve is fully activated, its moisture adsorption capacity is higher than other adsorption materials. The treated acetone solvent can reach a ppm level water content.
4. Low overall cost:
After the molecular sieve is saturated with adsorption, it can be regenerated through other methods. The service life of high-quality molecular sieves can reach tens of thousands of hours.
The molecular sieve adsorption drying method is particularly suitable for chemical applications that have very strict requirements on the moisture content of disease solutions.
Specific operations should be noted:
1. Choose the correct model and high-quality molecular sieve. The molecular diameter of acetone is about 0.6 nanometers. It is recommended to use 4A molecular sieve desiccant, which is the most cost-effective.
2. When the acetone solution flows through the molecular sieve tank for drying, it needs to be filtered first to ensure that most of the water, suspended solids and impurities have been removed from the solution to prevent the drying effect of the molecular sieve from being affected.
3. During the drying process and regeneration process, attention needs to be paid to controlling the operating temperature. Too high a temperature will affect the adsorption effect, and insufficient temperature will reduce the activation and regeneration effect.
4. Molecular sieve adsorption and drying is a physical behavior. The acetone solution flowing through the molecular sieve needs to control the appropriate contact time to ensure sufficient contact time.
5. Since acetone is flammable, safety procedures need to be followed during operation, ensure good ventilation, and take appropriate protective measures, such as wearing protective glasses and gloves.