defoamer-antifoam

COVID-19 is Coming for the Chemical Industry in 2020, BASF Predicts The chemical company's FY 2019 report warned the viral outbreak could lead to the worst growth in the sector since the 2008 financial crisis. BASF Group is worried about 2020. Specifically, it’s worried about the coronavirus. In a statement issued February 28 alongside its FY 2019, the German chemical company said that the viral infection could result in a second year of falling profit for the company and reduce global chemical production to about 1.2%. That would be the worst growth for the sector since the Great Recession in 2008 and a significant dip compared to 2019, when it grew 1.8%. The outbreak is inconveniently timed for BASF. The company began construction on a Zhanjiang, China plant complex in November 2019. The “smart Verbund project” is only a first step in a planned investment of $10 billion: BASF has plans to ramp up its investment in the Asia Pacific region to 41% from 27% through 2025. The planned ...

Chemical giant Dow confirms employees' infection with new crown virus, protection management is imminent! On March 17th, Dow Chemical stated in a statement that from March 2nd to March 11th, after a contract worker at Specialty Welding Services (SWS) worked at the Dow plant in Plaquemine, COVID-19 was detected as a positive infection. It is understood that SWS employees infected with the virus only work in one production unit in the plant's LHC unit, which poses a small risk to others outside the contractor team. Both Dow and SWS said that all workers in close contact with the worker had been tested for the virus. They will isolate themselves until all test results are available. On March 17, Dow Chemical announced the company's response plan to the incident: Dow said it would not “enclose” key personnel at its Placaming plant because it would negatively affect employees and their families. The Dow Chemical principal said that Dow would not close the Placaming plant. Howeve...

Antifoam Applications - When To Use or Should You Use Them? Foam is a gas (usually, air) dispersed in a liquid containing some impurity. In secondary treatment systems, bacterial activity is usually the main cause of foam, although mechanical action (cascading flow, pumps, violent agitation, etc.) and chemical contamination also can cause foam. Surfactants in the influent or in some polymer treatments can also cause foaming. Excessive foam, especially in an aeration basin, can cause a variety of problems. A foam blanket on the aeration basin can interfere with oxygen uptake of the microorganisms and hinder BOD reduction. Foam can also cause the biological floc to float producing a sludge which will not settle in the final clarifier. Safety hazards and aesthetic problems occur when wind blows foam across parking lots or highways or neighboring locations. Foam can become an aesthetic problem when a thick blanket of foam floats down a stream from the plant outfall. Antifoams control or e...

What is a defoamer / deaerator’s purpose in the system? Defoamers prevent formation of foam during manufacture and application of coatings and printing inks. Foam that is already formed is destroyed and air occlusions are prevented. Deaerators prevent development of air occlusions and pinholes. Why use a defoamer? The occurrence of foam is considered an undesirable but unavoidable phenomenon in coatings and printing inks. The formation of foam interrupts production processes, reduces the effective volumes in the production plant, and leads to unnecessary down time. Foam also interferes with the application process. In printing, foam can cause the ink reservoirs to overflow and can impair ink transfer from the printing cylinder to the substrate. Dried foam leaves surface defects in the paint film. To prevent foam and destroy any foam present, defoamers must be added to the formulation. defoamer vs. deaerator? To eliminate macro-foam on the surface, to prevent air occlusions, and...

Application of fumed silica in defoamer The fumed silica is a kind of high-purity, fine, amorphous nanometer silica powder. The specific surface area is 150 ~ 380m2 / g, the primary particle size is between 7 ~ 40 nm, the aggregate particle size is about 200-500nm, the agglomerate particle size is about 5 ~ 20μm, and SiO2 ≥99.5%. Functional additives. In addition to being widely used in silicone rubber, coatings, inks, paints, plastics and other fields, it is also an important component in high-efficiency silicone oil defoamers, which plays a role of dispersion, adsorption, thickening and anti-settling. Vapor-phase process carbon black generally has two types of hydrophilic and hydrophobic products. The hydrophobic products are obtained by surface treatment of hydrophilic products. As an important auxiliary in the industry, the defoamer has a small amount but is indispensable. It is widely used in various fields such as textile, papermaking, petroleum, food, pharmaceutical and so o...

What is Defoamers in paints, inks? Defoamers are chemical additives that reduce and/or prevent the formation of foam in industrial-process liquids. For this article, we’ll discuss defoamers in relation to paints, inks, adhesives and even construction products. The terms anti-foam agent and defoamer are often used interchangeably. However, anti-foam agents more accurately refer to materials that inhibit the generation and formation of bubbles. Dependent upon the application and performance requirements, they consist of polydimethylsiloxanes and other silicones, insoluble oils, stearates and glycols, as well as inorganics, such as silicates and talc. Foam is a coarse dispersion of a gas in a liquid, where the volume fraction of gas is greater than that of the liquid. The bubbles will migrate to the surface because their density is less than that of the liquid. As the bubbles coalesce and collect at the air/surface interface, the bubble walls thin and break. Defoamers accelerate the pr...

Mini-Encyclopedia of Papermaking Wet-End Chemistry Additives and Ingredients, their Composition, Functions, Strategies for Use ANTI-FOAM / DEFOAMER Composition: There is an extremely diverse set of chemical formulations that can be effective either to prevent foam (anti-foam) or to destroy it once it has formed (defoamer). Actually the distinction between these two terms is usually ignored. Most foam-fighting chemicals can serve either role. Let's therefore use the term "defoamer" as a general label for all of these chemicals. The most universal characteristic of any defoamer is the fact that it is surface active, but highly insoluble in water. It has to be formulated so that it will be dispersed as tiny droplets, i.e. as an emulsion. The surface-active nature of the material causes it to spread very rapidly onto any air-water interface that it encounters. This is especially the case if that interface already is covered by the types of surface-active materials...