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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.      

When applying defoamer, I was not clear about the amount of defoamer used and its characteristics, so when I did not make a few tanks, I found that there was a curved oily substance sticking to the surface of the textile when the blank fabric came out of the tank. When I first encountered this kind of problem, I couldn't tell where so many oils came from, because the oils (which colours are dyed, i.e., which colours are dyed with the oils) were attached to the surface of the textile and were very bright, and when I touched it with my hand, it penetrated into the textile, and when I took it, it was marked with dirt and could not be removed. After various searches for the cause, it was analysed that the oil was caused by the demulsification of defoamer. If the textile is stained by this waste, there is no way to remove it. After several tests, it is learnt that the more defoamer is used, the more serious the problem is. This was more pronounced for chemical fibre textiles such as polyester/cotton and polyester (whereas machines and equipment without defoamer did not exhibit this behaviour). Together, it is also noted that the water body is hard, Ca2+, Mg2+, Fe2+ and other metal materials positive ions are more, when the antifoam agent breaks the emulsion, the result will be caused by the separation of oil, resulting in the separation of oil floating in the dyeing solution, and the positive ions of the metal materials or the residue in the chemical fibres and modifiers, dyeing agents caused by the scum and stains are tightly combined, resulting in curved pigmented spots, graphics, and oil stains adhered to the textile fabrics. Therefore, the removal of foam together with many unfavourable conditions and adverse effects, and even lead to the damage of economic development.   The use of water treatment defoamer for this situation, the new type of printing and dyeing plant special type defoamer to deal with the difficulties. It has given characteristics: 1, it breaks the emulsion faster, inhibit the use of foam performance is good; 2, it is soluble in water, application of simple change. Especially in the application of non-positive ionic table activator management system of the production of manufacturing work; 3、It has a wide range of application, which can be used in ultra-high pressure overflow dyeing agent and various printing and dyeing processes; 4、It has excellent storage reliability.

The metal cutting fluid defoamer is a unique blend of modified polyether and fluorine ingredients. Flexible in water and perfect for enduring foam control in hostile environments such as high temperature, high acidity or alkalinity, high shear stress or high pressure. Notably, it is resistant to heat, acid and alkali; non-floating, and non-oiling; widely useful in various challenging foam removal systems.  With powerful defoaming and anti-foam capabilities, our defoamer requires minimal use, preserves the basic characteristics of the foaming system, provides excellent dispersion and penetration properties, effortlessly blends with oils and cutting fluids, and performs superbly in acidic, alkaline, salt, electrolyte and hard water. It is comparable to imported products at an intriguing price point.    Applicable: Metal cutting fluid, metal processing, cutting oil, hardware cutting oil, micro emulsions, solvent cleaning, acid/alkali aqueous cleaners, optical glass cutting liquid, wire cutting oil, automatic line cleaner, large net cleaner, lubricating (oil) solution, EDM working fluid, drill hole fluid, precision grinding solution, etching solution, electrolytic wire cutting fluid, etc. Product attributes: 1. Fast defoaming, sustained foam suppression, low dosage, preservation of base characteristics of the foaming system.  2. Excellent heat resistance, stable chemical properties, no corrosion, toxicity, adverse effects, nonflammability, or explosion.  3. Superior dispersibility, straightforward usage, low usage rate.  4. Robust defoaming efficiency significantly enhances mud lubrication and cooling efficiency, notably enhancing mud recycling efficiency.  5. Comparable performance to imported products but with a significant price advantage.

The existing layout of the sewage treatment system suffers from short sewage treatment processes, small footprint and short sewage retention time. To ensure the stable operation of the sewage treatment system as well as the discharge of effluent to meet the standards, the operators of the sewage system need to operate carefully in accordance with changes in the water quality at the source. Negative impact of abnormal discharges at source on sewage treatment The abnormal discharge of wastewater from the source into the wastewater treatment will have adverse effects on site, microbiology and discharge water quality as follows: Direct impacts on site Chromaticity The chromaticity is mainly caused by the discharge of dilute black liquor from the pulp shop and the dyestuff discharged into the wastewater from the paper shop when producing coloured paper products, in addition to chemicals such as paint and modified soap clay used in the paper shop. These coloured waters enter the wastewater treatment and stain the water in all the structures, resulting in excess colour in the effluent when the colour treatment capacity of the system is exceeded.   Foam Foam comes from the discharge of dilute black liquor from the pulping plant, the discharge of deinking agent from the deinking pulp plant and the surfactants used in the paper plant. The foam does not have a direct impact on the effluent index, but excessive foam can fly around when the wind blows and affect the site environment. Foam entrained substances can accelerate the corrosion of metal rails. Most seriously, when there is a lot of foam, it tends to lead to improper filtration of the slope screen, resulting in a reduction in the amount of effluent treated. Solid waste The solid waste mainly comes from reed residue discharged from reed pulp, sawdust lost from chemical wood pulp or chemical mechanical pulp, and residual pulp emptied when the paper workshop was changed to production, as well as felts and nets during the production and maintenance process. These solid wastes enter the sewage treatment system through the sewer, damage grilles, valves, lift pumps and other facilities, and in serious cases cause sewage treatment to shut down.   Sticky net The sticky net is mainly due to the high viscosity of the incoming water. Its source is mainly the remaining PAM when the paper workshop is changing production, the abnormal discharge of poorly dissolved PAM, and the PAM leaking from the pipeline/valve. In addition, anti-lint and shedding powders, wet strength agents, retention aids, filler aids, organic particles, dispersants, etc. used in the papermaking process will all increase the viscosity of incoming water. After the net is pasted, the sewage overflows from the surface of the inclined net to the ground, making the site unsightly; it flows into the rainwater ditch, causing suspicion of illegal sewage discharge; the sewage flows into the main outlet, causing COD, suspended solids and o...