1. How much does defoaming agent cost per ton
Defoaming agents are widely used in industrial production. For different industries, different defoaming agents are used, and the prices are also different. It will be different, so what is the approximate price of defoaming agent?
It is understood that the price of defoaming agents on the market is not fixed and will be affected by many factors, including the proportion of ingredients, the price of raw materials, transportation methods, and application fields (food grade is more expensive than industrial grade). The price is expensive), etc. The price of mineral oil defoamer is about 2,300-30,000 yuan/ton, the price of alcohol defoamer is about 2,500-30,000 yuan/ton, and the price of polyether defoamer is about 3,500-40,000 yuan/ton. / ton, the price of silicone defoamer is about 4,000-40,000 yuan / ton. (The above prices are from the Internet and are for reference only. Please contact the manufacturer for specific prices.)
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2. Where to buy defoaming agent
If you want to buy defoaming agent, there are generally three ways:
1. Spot purchase at the local chemical market
If you need to purchase defoamer directly, but the quantity is small, or there is an urgent need to use defoamer immediately, you can choose Go to the local chemical market to purchase spot products. However, there are fewer merchants selling defoaming agents, there are fewer choices, and the prices are more expensive, so you may not be able to buy them sometimes.
2. Contact the defoamer manufacturer
If the purchase volume is large, you can contact the defoamer manufacturer to place an order. The wholesale purchase price is relatively It is lower, but you need to purchase a large amount and choose a good defoamer manufacturer.
3. Purchase online
There are complete models of defoaming agents online at low prices. If you are not in urgent need of defoaming agents and need samples of many different types of defoaming agents to test before deciding to purchase them.
3. How to choose high-quality defoaming agents
When purchasing defoaming agents, in order to choose high-quality and easy-to-use defoaming agents, the main Depending on the production needs, the defoaming agent that generally meets the production needs should be:
1. Insoluble or difficult to dissolve in the foaming liquid
It is a defoaming agent.To eliminate foam, the defoaming agent should be concentrated and concentrated on the bubble film. In the case of foam breakers, it should be concentrated and concentrated in an instant, and in the case of foam suppressors, it should always be maintained in this state. Therefore, the defoaming agent is in a supersaturated state in the foaming liquid. Only insoluble or poorly soluble defoaming agents can easily reach the supersaturated state. Only when it is insoluble or difficult to dissolve can it easily gather at the air-liquid interface, be easily concentrated on the bubble membrane, and can it function at a lower concentration. For defoaming agents used in water systems, the molecules of the active ingredients must be strongly hydrophobic and weakly hydrophilic, with an HLB value in the range of 1.5-3 for the best effect.
2. The surface tension is lower than that of the foaming liquid
Only the intermolecular force of the defoaming agent is small and the surface tension is lower than that of the foaming liquid. Defoaming Only the agent particles can penetrate and expand on the bubble film. It is worth noting that the surface tension of the foaming liquid is not the surface tension of the solution, but the surface tension of the foaming solution.
3. It has a certain degree of affinity with the foaming liquid
Because the defoaming process is actually a competition between the foam collapse speed and the foam generation speed. , so the defoaming agent must be able to disperse quickly in the foaming liquid so that it can quickly play a role in a wider range of the foaming liquid. To make the defoaming agent diffuse quickly, the active ingredient of the defoaming agent must have a certain degree of affinity with the foaming liquid. If the active ingredient of the defoaming agent is too close to the foaming liquid, it will dissolve; if it is too sparse, it will be difficult to disperse. Only when the distance is appropriate can the effect be good.
4. No chemical reaction with the foaming liquid
If the defoaming agent reacts with the foaming liquid, on the one hand, the defoaming agent will lose its effect; On the other hand, harmful substances may be produced and affect the growth of microorganisms.
5. Low volatility and long action time
When choosing a defoamer, you must first determine the system that requires the defoamer, which is a water-based system. or oily systems. For example, in the fermentation industry, oil-based defoaming agents, such as polyether modified silicone or polyether, must be used. The water-based coating industry requires water-based defoamer and silicone defoamer. Select a defoamer, compare the dosage, and then refer to the price to get a suitable and economical defoamer product.
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