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  Fermentation refers to the process in which people use the life activities of microorganisms under aerobic or anaerobic conditions to prepare the microbial cells themselves, or direct metabolites or secondary metabolites. Fermentation is sometimes also called fermentation, and its definition varies depending on the occasion where it is used. Fermentation generally refers to a certain decomposition process of organic matter by organisms. Fermentation is a biochemical reaction that humans have been exposed to earlier and is now widely used in the food industry, biological industries, and chemical industries. It is also the basic process of bioengineering, i.e., fermentation engineering. Research on its mechanism and process control is still ongoing.   Reasons for foaming during fermentation: 1. Ventilate and stir, because the greater the ventilation, the more intense the stirring, resulting in a large number of bubbles. 2. During the fermentation process, the content of organic nitrogen sources is high, and the greater the viscosity and concentration of the fermentation liquid, the higher the stability of the foam generated. 3. When the bacteria grow vigorously, the protein concentration of the fermentation broth increases, and the concentration is enhanced, resulting in the generation of bubbles. 4. The cells of the fermentation tank are lysed, resulting in the release of a large amount of protein, the continuous expansion of the liquid, and the appearance of a large number of bubbles in contact with the air. 5. Affected by the environment, the temperature rises rapidly during fermentation, coupled with constant stirring during the fermentation process, resulting in increased bubbles.   Defoaming agent for fermentation is composed of polydimethylsiloxane, food emulsifier, dispersant, etc.   Reasons to use defoamer to solve foaming: 1. It overcomes the shortcomings of ordinary silicone defoaming agents, such as poor high temperature resistance and short foam suppression time, and can meet the requirements for foam control throughout the fermentation cycle. 2. The surface tension is small and has excellent diffusivity and permeability. 3. The economic benefits are obvious, and the dosage is small to control the cost. 4. During the fermentation process, the bacteria will not be harmed, and the growth environment of the bacteria can be improved.     The defoaming agent should have the following properties: 1. Strong defoaming power and low dosage. 2. Adding to the foaming system does not affect the basic properties of the system; that is, it does not react with the system being defoamed. 3. The surface tension is small. 4. It interacts with the surface in good balance. 5. Good heat resistance. 6. Good diffusion and permeability, high positive spreading coefficient. 7. Chemical stability and strong oxidation resistance. 8. Good gas solubility and permeability. 9. Little solubility in foaming solutions; 10. It has no phys...

  The main function of a defoaming agent is to eliminate foam and inhibit foam regeneration, and can be widely used in various industries. However, for many workers who do not understand and are using defoaming agents for the first time, there is a question that bothers them, that is, when should defoaming agents be added?   Let us take silicone defoaming agents as an example. Generally, Silicone defoamers have four addition methods:   1. Add before foaming: This method can suppress the foam by adding a defoaming agent in advance to the system where foaming may occur. For closed containers and devices, defoaming agents can effectively eliminate foam.   2. Continuous dripping addition: When the foaming liquid is either circulating or flowing, the defoaming agent will be consumed along with the circulating flow of the foaming liquid. In this case, use continuous dripping of the defoaming agent. By this method, the defoaming agent can effectively eliminate foam. If supplemented by a metering pump, the addition amount can be effectively controlled for the most economical use of defoaming agents. 3. Self-controlled addition: Any foaming liquid may not always foam. There is no exact rule for when to foam and the amount of foam. The defoaming agent is added to replenish consumption and does not need to be added when there is no foaming. Therefore, a self-controlled addition method can be adopted, and the defoaming agent can be added under self-control according to the signs of foaming.   4. Intermittent addition: If the foaming is not continuous and the foaming is not serious, the defoaming agent can be added at once or regularly. Because the amount of defoaming agent added is small, in order to disperse the defoaming agent evenly, it should be added in a place where the foaming liquid is turbulent. In many cases, it can be added manually. If the foaming is violent or in order to quickly eliminate the foaming, you can use a spray gun.    

Introduction: Cutting fluids play a vital role in various machining processes, such as turning, milling, and drilling, by reducing friction, dissipating heat, and improving tool life. However, during these operations, foaming can occur, leading to numerous issues including surface defects, reduced workpiece quality, and increased machine downtime. To combat this problem, cutting fluid defoamers are employed as additives to effectively control and eliminate foam formation.    Understanding Cutting Fluid Defoamers: Cutting fluid defoamers, also known as antifoaming agents, are chemical additives specifically designed to suppress foam formation in cutting fluids. These defoaming agents work by destabilizing the foam bubbles, causing them to collapse and disperse, thereby preventing foam accumulation. They are typically formulated using a combination of surface-active substances, silicone-based compounds, and emulsifiers.   Benefits of Using Cutting Fluid Defoamers: 1. Enhanced Machining Efficiency: By effectively suppressing foam formation, cutting fluid defoamers ensure uninterrupted contact between the cutting tool and workpiece, leading to improved machining efficiency and productivity. This results in faster material removal rates and reduced machining time. 2. Improved Surface Finish: Foam in cutting fluids can negatively impact the surface finish of machined components. By using defoamers, manufacturers can achieve smoother surface finishes, higher precision, and reduced surface defects, resulting in superior product quality. 3. Extended Tool Life: Foaming can lead to tool chatter and increased tool wear, reducing the lifespan of cutting tools. Defoamers help maintain a stable cutting environment, minimizing tool vibrations and ensuring longer tool life, thereby reducing tooling costs. 4. Minimized Machine Downtime: Foaming can lead to equipment disruptions, requiring frequent downtime for foam removal or fluid replacements. With cutting fluid defoamers, foam-related issues are mitigated, resulting in reduced machine downtime and increased operational efficiency. Conclusion: Cutting fluid defoamers serve as essential additives in machining processes, providing effective foam control and offering numerous benefits, including improved machining efficiency, enhanced surface finish, extended tool life, and reduced machine downtime. By incorporating these defoaming agents into cutting fluid formulations, manufacturers can optimize their machining operations, resulting in higher productivity, better product quality, and cost savings.

Wet phosphoric acid is an important chemical industry process used to produce phosphoric acid and related phosphate compounds. In the wet phosphoric acid process, the addition of defoaming agents can help solve the following problems: Control the generation of bubbles and foam: In the wet phosphoric acid production process, a large number of bubbles and foam may be generated due to the chemical reaction between the reactants and the high-concentration phosphoric acid solution. These bubbles and foam will occupy the effective volume in the reactor during the reaction process and reduce the reaction efficiency. By adding an appropriate amount of defoaming agent, the surface film of bubbles can be destroyed and the duration of bubbles can be reduced, thereby effectively controlling the generation of bubbles and foam. Prevent equipment clogging and corrosion: Larger bubbles and foam will adhere to pipes and equipment walls and may cause clogging and corrosion problems. The addition of defoaming agents can reduce the adhesion of bubbles and foam, reduce their deposition and accumulation in the equipment, thereby reducing the risk of equipment clogging and corrosion. Improve product quality: The presence of foam may lead to the presence of impurities and impure substances in the product, affecting the quality of the product. The application of defoaming agents can help reduce the content of suspended solids and impurities in the foam and improve the purity and quality of the product. The selection and use of wet phosphoric acid defoamer plays an important role in ensuring the smooth progress of the production process and improving product quality. By rationally selecting and controlling the use of defoaming agents, foam problems can be effectively controlled and production efficiency and equipment stability improved. When using defoamer, you need to pay attention to its addition amount and time to avoid excessive use or premature addition, which may cause negative effects or reduce product quality. Therefore, the selection and use of defoaming agents require sufficient experimentation and process optimization.  

Papermaking and pulping defoaming agent is a new type of papermaking and pulping silicone-specific defoaming agent that is composed of special silicone polyether as the main material and good dispersion additives. Its characteristics are high temperature resistance and strong alkali resistance, and it can quickly diffuse bubbles and eliminate foam under high temperature and strong alkali conditions.   Defoaming agent selection method 1. The defoaming agent is insoluble or difficult to dissolve in the foaming liquid. In order to burst the foam, the defoaming agent should be concentrated on the bubble film. In the case of foam breakers, it should be concentrated in an instant, and in the case of foam suppressors, it should always be maintained in this state. Therefore, the defoaming agent is in a supersaturated state in the foaming liquid. Only insoluble or poorly soluble defoaming agents can easily reach the supersaturated state. Only when it is insoluble or difficult to dissolve can it easily gather at the air-liquid interface, be easily concentrated on the bubble membrane, and function at a lower concentration. For defoaming agents used in water systems, the molecules of the active ingredients must be strongly hydrophobic and weakly hydrophilic, with an HLB value in the range of 1.5–3 to be effective. 2. The surface tension is lower than that of the foaming liquid. Only when the intermolecular force of the defoaming agent is small and the surface tension is lower than that of the foaming liquid can the defoaming agent particles be able to immerse and expand on the bubble film. It is worth noting that the surface tension of the foaming liquid is not the surface tension of the solution, but the surface tension of the foaming solution.   3. It has a certain degree of affinity with the foaming liquid. Since the defoaming process is actually a competition between foam collapse speed and foam generation speed, the defoaming agent must be quickly dispersed in the foaming liquid in order to quickly play a role in a wider range of the foaming liquid. To make the defoaming agent diffuse quickly, the active ingredient of the defoaming agent must have a certain degree of affinity with the foaming liquid. If the active ingredient of the defoaming agent is too close to the foaming liquid, it will dissolve; if it is too sparse, it will be difficult to disperse. Only when the distance is appropriate can the effect be good.   The papermaking process is divided into three main processes: pulping, papermaking, and coating. Since the pulping process requires the use of various cooking aids, such as anthraquinone, alkali sulfide, and sodium hydroxide, the washing process requires the use of washing aids (conducive to the separation between cooking waste liquid and plant fiber), such as nonylphenol polyoxyethylene ether (10–12) and sodium alkyl benzene sulfonate, plus pectin, lignin, and other substances present in the plant itself, thus ca...

In industrial production, the combined use of various additives can often produce unexpected effects. As one of them, silicone defoamer also has its unique partner!   First, let’s look at the synergistic effect of silicone defoamer and dispersant. Dispersants can help solid particles disperse evenly in liquids and avoid aggregation and precipitation. Silicone defoamer can eliminate foam in the liquid and prevent the foam from affecting the dispersion effect. The combination of the two can make the liquid more stable and improve the quality of the product.   Next, let’s take a look at the synergistic effect of silicone defoamer and preservatives. Preservatives prevent products from deteriorating and extend their shelf life. Silicone defoamers can eliminate foam caused by stirring, shaking, etc., and prevent foam from affecting the even distribution of preservatives. The two work together to make the product safer and more durable.   Then, let’s look at the synergistic effect of silicone defoamer and leveling agent. Leveling agents can improve the smoothness and gloss of liquid surfaces such as paints and inks. Silicone defoamer can eliminate foam in the liquid and prevent the foam from affecting the effect of the leveling agent. The two complement each other and make the coating more beautiful.   Finally, let’s look at the synergistic effect of silicone defoamers and emulsifiers. Emulsifiers help two immiscible substances form a stable emulsion. Silicone defoamer can eliminate foam generated during the emulsification process and prevent foam from affecting the emulsification effect. The two promote each other and make the lotion more stable.   Hopefully, this article on the synergy of silicone defoamers with other additives will help you better understand the interactions between these additives.   If you still have questions about silicone defoamer or other additives, let’s discuss them together.