The development of defoaming agent has experienced several generations:
1) the antifoaming agent is the earliest in animal and plant oil. For defoaming agent research later in China, there are still some sugar mill in animal and plant oil as antifoaming agent.
2) the second generation of defoaming agent, in the 1960 s in polyether type it is low molecular weight of epoxy ethane and epoxy propane block polyether.
3) the third generation of defoaming agent based on polydimethylsiloxane as the main body of the organic silicon defoamer. At present, the domestic basic focus on the research and application of the generation of defoaming agent.
4) the fourth generation of antifoaming agent is silica of water-soluble organic silicon defoamer polyether and special high temperature resistant silicone resin as the main body type alkali antimicrobial agent.
Defoaming agent, also known as defoaming agent, is to reduce the surface tension in the process of food processing, inhibiting bubble or eliminate has bubbles in food additives. Permission to use the defoaming agent in our country have emulsified silicone oil, high carbon alcohol fatty acid ester compounds, polyoxyethylene polyethylene oxide amyl alcohol ether, propylene season propyl alcohol amine polyoxyethylene gather oxygen ether, propylene gather oxygen glycerin ether and polyethylene oxide glycerin polyoxyethylene ether, propylene polydimethylsiloxane etc. 7
Generally speaking, the bubble is the raw gas in a liquid dispersions, belongs to a gas-liquid heterogeneous system. Bulk density is close to gas without close to liquid gas-liquid dispersions. Gas-liquid dispersion can be divided into liquid more gas less "bubble dispersion" and the "bubble" of the more liquid less. As shown above.
What is a bubble? The bubble may be defined as the stability of the gas in the liquid medium. Bubble is a kind of decentralized system of gas in a liquid, gas as many bubble liquid separated by continuous phase, gas is dispersed phase liquid dispersion medium.
Foam is a thermodynamic instability on the system, it can't be stable, bubble thermodynamic instability, is due to the broken bubble liquid system after greatly reduced the total surface area, thus system (free energy) to reduce energy very much.
Ma Lange effect prevent bubble film drainage, air bubble film thickness. Bubbles to air emissions, bubbles burst. Impact factor is this process that the apparent viscosity of bubbles and dense degree affect the defoaming agent on the membranes of the particles in the bubble surface diffusion.
Defoaming agent is liquid distribution of products more, mainly divided into three categories: mineral oil, organic silicon, polyether. Mineral oil kind of antifoaming agent is usually by the carrier, surfactant, etc. Carrier is a low surface tension of the material, bearing and its effect is diluted, common carrier for water, fatty alcohols, etc.; On restraint and elimination to the surfactant is a bubble, commonly used with wax, aliphatic amide, fat, etc. Organic silicon class defoaming agent generally includes polydimethylsiloxane, etc. Organic silicon class defoaming agent, poor solubility at room temperature with good defoaming speed quickly, inhibit, it occurs at high temperature stratification, defoaming slower, anti poor foam suppression. Polyether defoaming agent including polyethylene oxide ethylene propylene oxide glycerin ether, etc. Polyether kind of antifoaming agent has long soaking time, suppression effect is good, fast defoaming, good thermal stability. For example, in fruit and vegetable drinks, soy products, such as sugar production will be used in the process of defoaming agent
SL-AIR-100 foaming agent is a chemical product composed of many kinds of surface active agents, and it has highest 150℃ temperature resistance. It is mainly used in the tertiary oil recovery foam displacement, also used in the fields of foam washing well, profile control and water plugging, foam drainage and gas recovery. It could produce good foam with air, nitrogen and carbon dioxide, having good foaming ability. It could also compound with hard water with high salinity and high calcium magnesium content, having good foam stability, superior to similar products, and having good compatibility with other chemical additives.
Defoaming agent can destroy membrane elasticity and cause bubbles burst
Defoaming agent is added to the foam system, to the gas-liquid interface diffusion, which has a bubble effect of surfactant was difficult to happen to restore one's capacity to elastic membrane.
3. The defoaming agent can cause liquid film drainage, resulting in a bubble
Foam drainage rate can reflect the stability of the foam, add a accelerate foam drainage material, also can have defoaming effect.
4. Add the hydrophobic solids can lead to a bubble
In the bubble surface hydrophobic solids will attract surfactant hydrophobic, to produce hydrophilic hydrophobic particles and into the water phase, which have the effect of foam.
5. Solubilization bubble surface active agent can lead to a bubble
SL-ODF Organic Silicone Defoamer, as an effective defoamer, is refined from organosilicon agent, dispersing agent and various active agents after high temperature. It has a strong adhesive property, and defoams by forming new liquid film on the surface of foam. SL-ODF is used for eliminating foam existed in all kinds of water-based drilling fluids. It can be added to all kinds of water-based drilling fluids, the typical dosage ranges from 0.2% to 1%.
High effiency with low dosage.
Stable after high speed stiring and high temperature.
Good foam inhibition ability.
Chemistry: Silicone, PDMS Emusion.
LEAD OILFIELD SOLUTIONS COMPANY is a professional manufacturer and supplier of Pour point depressant, Corrosion inhibitor, Demulsifier in China. We offer stimulation service and chemicals, acid fracturing engineering. We produce such as clay inhibitor, encapsulated gel breaker, defoamer etc. Please visit the company's website at www.sloilfield.com. Connect with L.E.A.D. on Facebook, Twitter, Google+, and LinkedIn.
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