Method for improving stability of mineral oil defoaming agent
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A defoamer and stability technology, applied in the field of fine chemicals, can solve research and solutions that do not involve product stability issues
Active Publication Date: 2009-06-03
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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However, the information mainly involves the anti-foaming performance and brushing performa
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Embodiment 1
[0026] Add 26 parts of kerosene, 10 parts of defoaming additive (x=10, y=40, R=n-octyl) and 5 parts of EBS into the reaction flask, start stirring, slowly raise the temperature, the temperature rises to 140°C, and keep warm for 2h , and then quickly added to the stirred reaction bottle with 50 parts of liquid paraffin, cooled to 50 ° C, added 7 parts of emulsifier polyoxyethylene oleic acid (9) ether, stirred evenly and added 2 parts of 2 / g of hydrophilic white carbon black, stir quickly so that the hydrophilic white carbon black is evenly dispersed in the mineral oil system, and pass through a colloid mill to obtain the defoamer embodiment 1 of the present invention.
Embodiment 2
[0028] Add 30 parts of engine oil with a viscosity of 32mPa·s, 8 parts of defoaming additives (x=8, y=30, R=n-dodecyl) and 5 parts of aluminum stearate into the reaction bottle, and start stirring , slowly increase the temperature, the temperature rises to 140°C, keep it warm for 1h, then quickly add it to the reaction bottle containing 50 parts of white oil with a viscosity of 35mPa·s, and then add 5 parts of T-80 to the system when the temperature drops to 70°C Mix well, and finally add 2 more parts with a specific surface area of 300m 2 / g of hydrophilic silica, stir evenly so that the silica is uniformly dispersed in the defoamer system and pass through a colloid mill to obtain the defoamer embodiment 2 of the present invention.
Embodiment 3
[0030] Mix 30 parts of white oil with a viscosity of 35mPa·s, 5 parts of defoaming additives (x=10, y=40, R=n-octyl) and 5 parts of a specific surface area of 200m 2 / g of hydrophobic white carbon black is added to the reaction flask together, start stirring, slowly heat up, the temperature rises to 140 ° C, keep warm for 2 hours, and then quickly add to the stirring tank containing 53 parts of liquid paraffin and 5 parts of emulsifier oleic acid polyether In the reaction flask, make the mixture uniform, cool down to 50°C and add 2 parts of the specific surface area of 200m 2 / g of hydrophilic silica, and finally disperse at a high speed at a speed of 3000rpm for 0.5h on a high-speed disperser, so that the silica is uniformly dispersed in the defoamer system, and the defoamer embodiment 3 of the present invention is obtained.
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Abstract
A method for improving the stability of a mineral oil defoaming agent, which belongs to the field of fine chemical preparations, is characterized in that the viscosity of the mineral oil defoaming agent system can be improved after strong shear action by adding hydrophilic inorganic particles into the system and uniformly dispersing the hydrophilic inorganic particles into the system, thereby improving the product stability. The defoaming agent comprises (1) mineral oil carrier 70% to 90%; (2) main defoaming substances 1% to 15%, containing hydrophobic white carbon black and ethylene bis stearamide (EBS); (3) defoaming aid 1% to 20%: RO(EO)x(PO)yH polyether; (4) nonionic surfactant 3% to 15%; and (5) hydrophilic inorganic particles 0.1% to 5%, containing hydrophilic white carbon black, aluminum oxide, zinc oxide and magnesium oxide. The operation comprises following steps: (A) adding the mineral oil into a flask, adding the main defoaming substance and the defoaming aid therein, stirring, heating to 80 to 150 DEG C, and keeping the temperature for 0.5 to 3 h; (B) lowering the temperature to 50 to 80 DEG C, adding an emulsifying agent, uniformly stirring, lowering the temperature of the mixture system below 40 DEG C and adding the hydrophilic inorganic particles; (C) passing through a colloid mill; and (D) vacuum degassing to obtain a mixture with good stability, i.e. the mineral oil defoaming agent.
Description
technical field [0001] The invention relates to a method for improving the stability of mineral oil defoamers. More precisely, the invention utilizes the surface hydroxyl groups of hydrophilic inorganic particles to form hydrogen bonds in mineral oil systems to increase the viscosity of the system to improve the stability of mineral oil defoamers. Antifoam-like stability. The defoamer belongs to the additive of fine chemicals, therefore, the present invention belongs to the technical field of fine chemicals. technical background [0002] In industrial production, in order to disperse water-insoluble substances in water, it is inevitable to use surfactants to reduce the interfacial tension between oil and water. The shearing action in the industrial process helps air to enter the system, and the surfactant in the system is adsorbed on the bubble film to further stabilize the bubble film. Therefore, there are a large number of hazardous foams in the industrial system. This p...
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Application Information
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