Petrochemical company lubricant defoamer solution

Customer type

1. Customer information: In a petrochemical company in Indonesia, Nanhui's lubricant defoaming agent is used as the terminal. Bubbles are generated during high-speed mixing and canning. The defoamer provided by the original defoamer supplier suppresses foam The time is not long enough, it will slightly affect the transparency, so we turn to Nanhui, a defoamer manufacturer.

2. Sample information: No. 3 oil

3. Customer requirements: Need to defoam quickly, and regenerate without bubbles for a long time after adding the defoamer. The compatibility of the defoamer should be good and the transparency should not be affected.

Principle and analysis of defoaming

1. Analysis of the cause and hazard of blistering:

Lubricating oil is an oily liquid used to lubricate and cool the friction parts of the machine. With the development of industry, the requirements for lubricants are getting higher and higher, and many active surface additives have been added. When lubricating oil is internally combusted during use, it must be sprayed into a mist. It is unavoidable that a large amount of air will be mixed in. The surfactant will wrap the gas in and form a stable foam. The foaming of lubricating oil increases gas-liquid contact, promotes oxidation, produces flotation, and causes uneven mixing of components, thereby deteriorating the lubricating oil. Affecting the normal operation of the unit, the oil tank or oil tank is filled with foam and overflows, causing the lubricating oil level to drop, causing damage to the lubricated parts, destroying the uniform supply, and affecting the smooth operation. Of course, when the cooling function is needed, that will reduce the cooling function of the lubricating oil.

2. Analysis of the defoaming experiment process of lubricating oil:

"Foam" is a heterogeneous system in which insoluble gas enters the liquid under the action of external force and is isolated by the liquid, that is, a limb system in which the gas is dispersed in the liquid. The generation of foam is directly related to the surface tension of the liquid. The developed lubricating oil was formulated into a series of aqueous solutions of different concentrations, and the surface tension of the aqueous solutions of different concentrations was measured. ,

After a series of experiments, it can be seen that adding lubricating oil can significantly reduce the surface tension of water. When the concentration reaches 1.50h, the surface tension drops to a minimum. That is, CM (two value is 1.5%. From the characteristics of the curve, lubricating oil is similar to a kind of surface activator. When the concentration of lubricating oil reaches (:61(2), a large amount of surface water will accumulate on the surface of the aqueous solution. The active material forms a monomolecular membrane to minimize the tension of the system surface. The surface active material has an amphiphilic structure, one end is hydrophilic and the other end is lipophilic, which is easy to form foam. Actual use of lubricating oil, the preparation concentration is greater than CM (two value, solution There is a sufficient amount of surface active substances in the metal processing process. When the ring is used in the metal processing process, it will form bubbles in contact with a large amount of air. The surface active substances are aligned at the gas-liquid interface to form an adsorption film, which makes the foam stable. With the lubrication process Some solid particles are also easily adsorbed on the surface of the foam, forming a three-phase foam, which makes the foam more stable. Therefore, the main reason for the formation of foam in lubricating oil is the positive adsorption of active substances in the gas-liquid boundary to form stable absorption. Membrane. The data and experimental steps are omitted in this article. If you need more information, please contact Nanhui.

3. Analysis of lubricating oil defoamer scheme

According to the reasons for the foaming of the experimental lubricating oil and the experimental results, the lubricating oil defoamer should be used. The lower the viscosity of the lubricating oil, the lower the relative viscosity of the suitable defoamer and the higher the solubilization. on the contrary.

Therefore, it is concluded that the effect of low-viscosity lubricating oil CQ-334, CQ-334B, etc. is the most significant.

Therefore, it is concluded that the effects of high-viscosity lubricating oil CQ-336, CQ-336B, etc. are the most significant.

Because lubricating oil is similar to transmission oil, hydraulic oil, metal cutting fluid, drawing oil, emulsified oil, cooling oil, grinding oil and other foaming reasons, the results of this experiment are applicable.

Comparison of defoaming test

Formula selection

Name of defoamer Lubricating oil defoamer

The ingredients are as follows: (For details, please consult the fine chemical engineer of Nanhui Defoamer: 0086-134-2860-1010)