defoamer-antifoam

Defoamers Test Method--- Fermentation Defoamer type:  Silicone¨  Polyetherþ  fatty alcohol ¨  Mineral oil ¨ Others ¨ 1. Defoamer performance: (Air drum test) Accurately weigh 200ml of foaming medium with a 1000ml measuring cylinder, turn on the air bubble to the specified foam and mention 800ml and record the blank time, then add the prepared defoamer sample, stir it evenly, then turn on the air bubble and record the volume V changes with time. 2. Solid content test (instrument: oven, Surface dish) Turn on the oven, set the temperature to 105°C, wash and dry the watch glass Weigh a certain amount of defoamer sample on the watch glass, and record the weight of the watch glass before and after adding the defoamer as ml and m2 Put the watch glass with the sample in the oven, close the oven after 1h, put the watch glass in the desiccator and cool it, then weigh it as m3; The solid content of the sample is: W=(m3-m1)/(m2-m1)*100% 3 . Viscosity (instrument: mechanical visc...

What is a silicone defoamer ? Why can silicone work to break foam? The defoamers must be able to reduce the surface tension to break foam in order to control foam, Compared with most other foam control materials, silicone has lower surface tension and interfacial tension, it is difficult to be dissolved by surfactants commonly used in the system. At the same time, compared with glycol-based or mineral oil-based defoamers, the toxicity is relatively low. What are the advantages of silicone defoamers? Is it suitable for corrosive conditions? Silicone defoamers can ensure efficient and lasting effect. Silicone defoamers are very safe. Many categories meet the requirements of the US Food and Drug Administration (FDA), the US Environmental Protection Agency (EPA), the US Department of Pesticides (USDA) and other regulations , Low surface tension, can effectively control the generation of foam in a variety of foaming materials. There are a variety of defoamers that can perform well under var...

The global papermaking chemicals market will exceed 42 billion US dollars in 2025 Relevant data show that the global papermaking chemicals market will exceed 42 billion US dollars in 2025. Papermaking chemicals as follow: process chemicals, functional chemicals, pulping chemicals on the other hand by type, they can be divided into special chemicals, commodity chemicals, etc. Papermaking chemicals are specifically used to change paper properties, including color, strength, recycling performance, basis weight, quality, and related attributes. In order to obtain specific functions, the paper undergoes various processes such as bleaching, beating, strengthening and sizing. In order to further improve paper quality and improve multiple functions, people in the industry continue to improve the performance of paper, and it is expected that the scale of the chemical industry will be further promoted in the next few years. Why does paper chemicals has been increasing? As the pursuit of paper fi...

How should we select defoamers / antifoams for paper pulp? Pulp and paper antifoaming agents is very necessary in papermaking, because a lot of foam will be generated in the process of papermaking and pulping, the surface tension of the generated saponification is less than the surface tension of black liquor produced by cooking materials, making it It exists in the surface layer of black liquor and forms a thin film, which forms foam under the mixing action of air. The papermaking process is mainly divided into two major steps,  Washing pulp Papermaking No matter which step inevitably produces foam, so you need to use defoamers/antifoam for paper industry, there are many types of defoamers, the following is for everyone Introduce the characteristics of papermaking defoamers. Excessive foaming will result in the loss of fibers and raw materials. Further, the presence of air in the wet paper web can affect the filtration rate of paper in the paper making pulp defoamers is a better s...

The epidemic situation of the new coronavirus in China has been effectively controlled, but coronavirus has already broken out in other regions of the world. In addition to our country, Italy has also set up blockade and isolation measures. Potential negative demand impact-FMCG growth slows Worries about the virus are likely to affect consumer consumption patterns. From the perspective of pulp and paper, this trend will most directly affect packaging demand. In the past, the post-holiday recovery difficulties caused by the virus in our country, the large-scale loss and even the closure of the tertiary industry such as catering, tourism, and supermarkets, as the virus entered other major countries (the Western country ’s tertiary industry accounted for a larger proportion May be more prominent), consumers may exhibit similar behavior. Trend chart of the proportion of employment of tertiary industry in China   Trend char...

Why does foam generate in biochemical water treatment process? Chemical foam (starting foam) It is formed by the agitating and blowing off the surface active substances in the wastewater. In the initial stage of activated sludge cultivation, there are many chemical foams, and sometimes foam hills up to several meters are formed on the surface of the aeration tank. This is mainly because the initial activated sludge has not yet formed, and all the foam-generating substances form foam under the action of aeration. With the increase of activated sludge, a large amount of surface active substances are absorbed and decomposed by microorganisms, and the foam will gradually disappear. Chemical foam is milky white, easy to handle, can be filled with water to defoam, or defoamer has been added. Denitrifying foam If the nitrification reaction is carried out in the sewage plant, denitrification will occur in the sedimentation tank or in ...

Defoamers for Distilleries and Sugar Refineries During the production process of the sugar industry, the sugar liquid is mixed with the air under the influence of factors such as stirring, flow and transportation, and it is easy to produce a large amount of foam. The generation of foam often causes the sugar liquid tank to rise and cause material loss. At the same time, more foam also affects the transportation of the sugar liquid, resulting in difficulty in operation. In the evaporation and crystallization section, the thick foam slows down the evaporation and crystallization speed of water, increases energy consumption, and affects the economic benefits of the sugar factory. Therefore, it is very important to eliminate and suppress the formation of sugar liquid foam. The methods for eliminating foam generally include mechanical physical defoaming method and chemical defoaming method. Due to the advantages of time-saving, labor-saving, less investment and quick results, the defoaming...