1. Complete formula and preparation methods of defoaming agents
Defoaming agents are additives used to eliminate harmful foam produced in industrial production. There are many types of them. Different types of defoamer have different ingredients and formulas. Here are some commonly used defoamer formulas and preparation methods:
1. Silicone defoamer
(1) Formula: 10g methyl silicone oil, 10g sodium tripolyphosphate, 70g salt, 5g mannitol, 2g silicon dioxide.
(2) Preparation method: Mix methyl silicone oil and silica at room temperature, mix crushed sodium tripolyphosphate, mannitol, salt, etc., and stir the two thoroughly. , the white powdery finished product can be obtained.
(3) Usage: This product is used to eliminate foam and is widely used in fermentation in the production of antibiotics and monosodium glutamate, soy product production, molasses cooking, printing and dyeing, pulping and papermaking, petrochemical industry, paint coatings and washing. During the production process of agents, etc.
2. Mineral oil defoamer
(1 ) Formula: 15.5g C4-8 alcoholamine, 45g hydrocarbonized oil, 27.5g C10-18 fatty acid, 7g defoaming agent, 4.7g dispersant, appropriate amount of water.
(2) Preparation method: Mix hydrocarbonized oil, C4-8 alcoholamine, defoaming agent and dispersing agent. Esterify at a temperature of 70-150°C for 30-150 minutes, then mix with defoaming agent and dispersant, add water at 20-80°C, mix and emulsify for 1-4 hours, and the finished product can be obtained.
(3) Usage: This product can eliminate foam and can be used in situations where silicone is not suitable. It is widely used in papermaking, cleaning, printing and dyeing, fermentation and other industries, especially in the polymerization and condensation of the rubber and plastics industry. , Defoaming and suppressing foam in the degassing process.
3. Polyether defoaming agent
(1) Formula: polyoxypropyl polyoxyethyl glyceryl ether 57.1g, C10-18 fatty acid 12.5g, 29.4g defoaming agent, 0.7g dispersant.
(2) Preparation method: Put polyoxypropyl glyceryl ether or polyoxypropyl polyoxyethyl glyceryl ether and C10-18 fatty acid into the reaction kettle, stir under normal pressure, the temperature Control the temperature at 90-150℃ and the time at 20-90min to complete the esterification reaction, then lower the temperature to about 50℃ and add defoaming agents respectively., dispersant, stir for 30-60 minutes at 40-50°C to obtain a colorless to yellow liquid product with a pH value of 5-7 and a density of 0.8-1.
(3) Usage: This product is a highly efficient defoaming agent used in water media.
4. Soy product defoaming agent
(1) Formula: 82g rice bran oil, 5g soybean lecithin, 6g sorbitan fatty acid ester, 5g solid powder, 1.8g silicone oil.
(2) Preparation method: The finished product can be obtained by heating, stirring and mixing the above raw materials.
(3) Usage: This product can be used to eliminate or inhibit foam generated in the processing of soy products. It can also be applied to other product processing industries, pharmaceutical manufacturing, printing and dyeing, papermaking, chemical industry, etc.
2. Can defoamer formulas with different formulas be mixed?
There are many defoaming agent formulas, and the formulas of different types of defoamer agents are different. So can defoaming agents of different formulas be mixed?
Generally speaking, it is not recommended to mix defoaming agents of different formulas for two reasons: First, the foam suppression properties of defoaming agents of different formulas will be different, and mixing with other defoaming agents may cause Affect the use effect; secondly, the use of defoaming agent must be controlled in dosage. Using too much will affect production. If multiple defoaming agents are mixed, it is not easy to control the dosage.
If the website content violates your rights, please contact us to delete it。
