How to use organosilicon defoamer in textile printing and dyeing, petroleum and petrochemical

petrochemical industries


Drilling: ethyl silicone oil (or methyl silicone oil emulsion) is used as mud additive.


Oil recovery: oil and gas separation, defoaming rod. The melting point is 2.8-13.9 degrees higher than the foam temperature at the wellhead.


Natural Gasoline Absorption: Dimethyl silicone oil is mixed into 2% solution with gasoline.


Oil and gas separation demulsification:


A. Separation of oil and gas, adding 0.025-0.0065mg/kg to crude oil can improve production capacity.


B, demulsification: crude oil generally separated from micro emulsion W/O, adding 0.2mg/Kg suitable defoaming agent can achieve the effect of demulsification and defoaming.


Refining: Vacuum distillation with defoamer improves the color of distillates and widens the range of distillates. Diesel oil solution with silicone oil is commonly used.


High-energy fuels (internal combustion, jet, aviation fuels) are dispersed in high flash kerosene with cyanoalkyl polysiloxane, and then used as high-efficiency defoamer in high-energy fuels.


Asphalt and Residue: Silicone oil content is 0.2 x 10-6-2.0 x 10-6


Delayed coking, coke removal and scale elimination: reference amount of defoamer added: 0.05-100*10-6.


Defoaming drilling fluid: high viscosity sulfometallic salt (calcium petroleum sulfonate: sodium sulfonated asphalt = 1:1), the amount of siloxane added is about 100-400 x 10-6 or 5-15 mg/Kg, and sulfonate: siloxane close to 1:1 is the best.


Lubricating oil: such as internal combustion engine, automobile lubricant, metal processing fluid, compressor oil, etc., when adding silicone oil as defoaming, because of the following advantages:


A, insoluble in lubricating oil, in a dispersed state, is conducive to adsorbing on the bubble film to break bubbles;


B. There are alkyl groups similar to mineral oils, which can squeeze into the vesicles and weaken the molecular gravity.


C. Low surface tension, good penetration, local surface tension is reduced when adsorbed on the surface of the vesicle, and bubbles are broken due to uneven surface tension of the vesicle.


Heavy oil is made of silicone oil with low viscosity and 1-10 *10-6 addition. In addition, alkyl polyacrylate is also better, with better gas release. Branched chain amine is added to crude gasoline and naphtha, and then to lubricating oil. It can also be used as defoamer. The amount of branched chain amine is 0.05-1%. This defoamer can be added to metal cutting fluid.


From Silicone Public