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Defoamers are widely used in food industry, paper industry, water treatment, oil production, printing and dyeing industry, coatings industry, detergent industry, rubber latex industry, aerosol industry, daily chemical industry, pharmaceutical industry, dairy industry, etc. . For example, when the lubricating oil is in contact with and blown by the air, it often forms tiny bubbles in the oil and is difficult to disappear. In this way, oil supply to the bearing gear sometimes causes poor lubrication and failure, and the volume of the lubricating oil is increased from the storage tank. The oil in operation can cause a drastic change in the transmission of power due to the inclusion of air bubbles. Fresh oil often foams as time goes by. If 0.001 to 0.0001% of poorly soluble dimethylsiloxane is added to the oil, the foaming may be stopped arbitrarily. Therefore, it is commonly used as a defoaming agent for turbine oil, gear oil or the like. Defoaming agents are mostly surfactants and should have the following properties: (1) Defoamers can reduce the effectiveness of foam stabilizers by direct chemical reaction to form products that do not stabilize the foam. A non-polar solvent that is less dense than water and insoluble in water will spread over the surface of the water, creating a new surface that will cause damage to the foam. These solvents are only effective for surface foams and not for dispersed foams.
(2) The foam former may be replaced by another coupling surfactant, or it may be removed from the bubble wall by a polar solvent such as alcohol.
(3) Reducing foam stability can be accomplished by increasing surface tension, reducing surface viscosity, or reducing hydrogen bonding.
(4) The antifoaming agent may contain a hydrophobic solid which can form a local weak point or a low surface tension point. Foam bubbles with weak points are easily broken.

Jinan Huijinchuan Chemical Co., Ltd. is a private joint-stock fine chemical enterprise with a sound management system. Long-term commitment to the development, production and sales of chemical products. The company's products are produced and operated including Organic chemical raw materials, pharmaceutical intermediates, textile fuel additives, organic solvents, food additives and feed additives. Products are widely used in medicine, chemical, building materials, food, cosmetics, plastics, military and other industries. The company has self-support import and export rights. In addition to selling well in the domestic market, the products are also exported to Germany, the United States, Canada, South Korea, India, Southeast Asia and the Middle East. In order to better spread the grand blueprint for the company, foreign countries: establish partnerships with large multinational companies such as Dow, BASF, THSOH CORPORATION, BP, Exxon Mobil, Aksu; domestic: with Qilu, Yanhua, Yangzi, Jihua, Jinzhou Petrochemical, etc. Formed a alliance, established a comprehensive import and export network, such as amines, lipids, alcohols, and various organic and inorganic acids, alkalis and salts that are scarcely used in the mainland, and the basic chemical raw materials for seeking foreign demand from China. And pharmaceutical intermediates, etc., have created a good corporate image in the chemical and chemical industries and won business credibility.

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