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Antifoam by industries

Textile and Dyeing industry

Textile industry is one of key industry in the world. As everyone knows that cloth can be made by many processes, such as spinning, sizing, desizing, refining, bleaching, dyeing, printing, researching and so on. But can you believe that in each of above above process you all need to add antifoam to solve your foaming problem?  Here we only talk about the following 7 processes:
Spinning: Chemical fiber oil which main components are surfactant and mineral oil, does easily form harmful foam through the spinning process. For this point, Chem Sources suggest that you can use organosiloxane antifoam series to satisfy the high defoaming performance.
Sizing: After sizing the warp's intensity increases, and the surface becomes stickers-off and finish so that friction can be reduced and flexibility can be increased during the process. In the formulation of slurry, you can not only use the major adhesion agents but also need to add some surfactants as slurry aids in order to increase sizing efficiency. However, both of the above two slurry aids can easily cause foam, especially the slurry adhesion agent. Because it brings more foams during sizing process and inhibit penetration of slurry. In this situation, we suggest you use the organosiloxane antifoams to control these undesirable foams.
Desizing: Fabric desizing, scouring and bleaching processes are collectively known as the pre-treatment process. Pretreatment basically removed all impurities which affect fiber dyeing and printing providing a concise purified fibrous material for these two processes. In addition to the desizing agent, certain surfactant should be used to promote desizing speed and improve the effect.
Scouring: Scouring can improve the fabric's permeability and whiteness, enhance the printing and dyeing quality. Scouring agent is a mixture mainly composed of caustic soda, with anionic, nonionic surfactants and other substances (such as impurities absorbent, antif-brittle loss agent, water softener, ect.) as auxiliaries. Scouring process is generally operate under strong-alkali and high-temperature conditions, so it has very strict request for the defoamer under such circumstances. Generally, we use silicone defoamer for this process, but we also take scouring agents compatibility into consideration when we select appropriate defoamer.
Bleaching: Bleaching is the process in which the bleaching agent can completely destroy the residue of natural pigment chromophore structure on the fiber, and further remove other residual impurities, so that the fabric can meet the whiteness requirements. The bleaching agents used in cotton and cotton-blend are usually hypochlorite, hydrogen peroxide, sodium chlorite and other oxidants. Since the bubbles in this process are less than in other processes, general textile defoamer is efficient enough to eliminate the foams in this process.
Dyeing: The process of dyeing refers to the process that the fiber and dyes combine physically or chemically to make it colorful. Antifoam is added to break and inhibit the foam especially in dye-solution's moving condition. If the bubble problem no solved, it will caused uneven coloring, or many "white spots", commonly known as the "Silicone spot". antifoam agents can mainly solve foam problems under dynamic condition. If you do not control the foams immediately, the excessive foams will cause non-uniform dyeing or too many flakes. In order to solve this problem, we suggest you that when requesting assistance, please prepare to describe the process and information of application under high temperature dyeing condition so that we can recommend you suitable antifoam to prevent silicone spots.
Printing: Printing refered to the process that combines some parts of fabric with dyes/pigments to obtain figures and patterns. The biggest difference between printing and dyeing is the use of original paste rather than water as a dye transferring medium, with aim to prevent the patterns ambiguity caused by dyes permeability along fiber capillary. The original paste is mainly composed of pasty material to enhance the dyes viscosity plus a small amount of water

Pulp and Paper making industry

Textile industry is one of key industry in the world. As everyone knows that cloth can be made by many processes, such as spinning, sizing, desizing, refining, bleaching, dyeing, printing, researching and so on. 

Why the Foam Exists and Being harmful for pulp? Through the White Water & Rosin Sizing process of Paper making, the foam problem directly affects the stability of producing and quality of paper. Harmful foam is the key problem during the papermaking industry, especially on the Process of White Water & Rosin Sizing. Because once the content of harmful foams reach 0.5%~1% in the pulp (counted by volume), we MUST do something to control these harmful foams. Otherwise, it will bring on consequent harmful effect for Papermaking.

The Forming Term of Foam in Pulps:  Foams flow on the surface of the pulp. Entrained air which which dissolve in the pulp. Micro foams which absorb on surface of the fiber or entraining between the fiber in the pulp (Free gassy content in the pulp).

What is the development history of the defoaming agent for White water & Rosin Sizing?: Kerosene and low-grade hydrocarbon (Primal stage). Merely can use as a foam breaker on the liquid level in the head box, but has no efficiency on eliminating foam on the pulp. Low cost, Reduce the efficiency of sizing, As we well known that easy volatility and low flash point of the kerosene can easily cause fire. 

CHEMSOURCES papermaking defoamers for White Water & Rosin sizing: The raw material of CHEMSOURCES Defoaming Agent is similar to other international ones, however, the cover 20 years experience on the researching and developing foam control agents make our products inhibit foam longer and deaerate better. For whitewater and rosin sizing process,  CHEMSOURCES has two types of papermaking defoamers which are fatty alcohol based and modified polyether based. They work on adsorbing the Micro Foams on the surface of the fiber or entraining between the fibers and at the same time, they can quickly eliminate these foams. In one word, we can say CHEMSOURCES defoamers are safe, innoxious, efficient and economical chemical assistants.all need to add antifoam to solve your foaming problem?

How to use CHEMSOURCES defoamer through White Water and Rosin Sizing Process?: in order to reach the best defoamer efficiency, appropriate time and place is also very important. Generally, the main adding position of defoamer is white water tank under the wire. Besides, we can also add it into mixing pulp tank, entrance of washer pump, off-machine white water tank, and overflow box of white water. Different paper machine system has different requirement, it relates to other chemical's applied effect and design of paper machine's short recirculation system. Please contact CHEMSOURCES.

Fertilizer industry

As we know that phosphate acid is one of import raw materials to produce high concentrate phosphoric fertilizer. Usually the “wet process” refers to the method in that we use acid such as sulfuric acid, nitric acid, hydrochloric acid to decompose the phosphate rock in order to obtain phosphoric acid. This method mainly includes acidolysis and filtration process.

In the above process, there will be excessive carbon dioxide gas released with some organics. At the same time, the various inorganic impurities, such as the metal carbonates, sulfates, and silica and fluorine compounds in the digestion liquor will speed up the foams formation. These excessive foams will result in overflowing, which leads to material loss and retard the normal operation of equipment.

CHEMSOURCES phosphoric fertilizer antifoam has good foam elimination and inhibition performance with low dosage. 

Metal Surface Treatment

The process of Metal Surface Treatment usually includes alkaline cleaning, decaling, surface mending, phosphorization, degreasing and etc. The exist of surfactant cause lots of foams flow out of the cleaning tank. These foams don't only pollute waste on the raw material, but also affect the cleaning quality. Our antifoam specialist suggest you to use the non-organosiloxane antifoam agent for preventing the formation of silicone spot.

Paints and Inks industry

Paint is a kind of fine chemical that after coating on the substance surface by certain techniques, it will be solidified and form into a slinky, intensive, continuous foil with special functions.

In order to decrease the surface tension of water and brushing surface, we usually add certain amount of surfactant agents such as wetting agent, dispersants, leveling agent. And the exist of these surfactant agents accelerate the foams occurrence and existence. Besides, during construction processes, such operation as rolling, brushing, spraying can cause foam formation by changing the system’s free energy.

The dosage of antifoam is low, but the efficiency is very obvious. For the foam generated by water-base and non-water-base coating, the antifoam containing mineral oil and alcohol will obtain much better performance because of interfacial tension reduction and good dispersion capacity.

Because the process of printing ink is basically the same as coating, the method of antifoam addition is generally the same. When selecting paint/ink antifoam, besides considering the efficiency of foam breaking and inhibition performance, we should put more emphasis on brushing effect to avoid the shrink holes, shrink edge and other problems. 

Food processing

The whole process of sugar making generally includes the raw materials treatment, liquor extraction, cleaning, evaporation, crystallization and clearing.

Transport and Cleaning: When we agitate and transport the sugar it will easily react with air and for
m lots of foams and these foams will always cause the sugar liquor to overflow from the tank. CHEMSOURCES suggest you to use a few polymer antifoam or alcohol antifoam to eliminate these harmful foams. 

Percolation Filtration: The diffusate's sugar content is about 85% and it also contains some surfactants which easily form foams.

Fermentation: The fermentation vessel is always filled with foams because of the plenty of resultant alcohol. For this situation, Chem Sources silicone antifoam is commonly used.

Evaporation and Crystallization:  During the process of evaporation, the thickness foams reduce the speed of the water evaporation and crystallization, slow down the reaction, lengthen the reaction period, increase the consumption and effect on the sugar manufacture's economic benefits. Nevertheless only add less than 1 KG of antifoam agents, it's already enough to prevent the big bubbles on the surface.

Chem Sources Antifoam can also be normally used in seafood, potato and pea washing processes.

Cleaning industry

The main working process of “Printed Circuit Board”, which is called PCB, normally includes: paste membrane, development, peel of membrane, washing. During these processed, foams mainly come from the dry film and the wet film of the polymeric membrane.There are two types of Antifoam Agents used in PCB washing process: the organosiloxane emulsion antifoam agent and the nonorganosiloxane bulk antifoam agent. The Organnosiloxane antifoam has been used in previous years, the unstable property of this type of antifoam agents make customers regularly clean the manufacture machinery. In recent years, the ether based non-silicone antifoam agent has been widely used by many PCB manufacturers. With the good compatibility and low emptying, this new type of antifoam agent increase production efficiency directly. 

Petroleum industry

In the oil industry, the foam problems exist in many process, such as oil drilling, oil refinery , crude oil transportation, residual oil storage and processing , and finished oil storage and transportation

Detergent industry

The main ingredients in material for detergent are nonionic and anionic surfactants. While they are great in fabric washing, they will structure foams effectively specifically for the automatic washing machine. During the washing cycle, air bubble or foam are formed numerously by mechanic force of the drum which in turn float all the clothes and make them difficult to be cleaned effectively. Chem Sources powder antifoam can effectively control excessive foaming and evades silicone spot of cloth surface in the detergent used specifically for washing machine.

Fermentation industry

In brief, the two works during the fermentation industry is to transform the starch into sugar by the amylase, and then transform sugar into final products by yeast. You have to eliminate the CO2 in time all through the process; otherwise it brings negative effects on the fermentation.

There are two reasons for foam formation: 1) the property of yeast or medium. For example, if the yeast exists under the nutritional conditions and also the oxygen in fermentation of yeast will still bring foams problem. 2) The thick yeast liquid. The foams caused by thick yeast liquid are hard to be broken. Thus the overflowing foams will cause the loss of the fermentation. The antifoam used in advance will be suggested to prevent this loss.

CHEMSOURCES fermentation defoamers include silicon defoamer, modified organic-polyether defoamer, polyether defoamer and others. In recent years,  CHEMSOURCES  modified polyether defoamer is becoming more and more popular by customers because it does not only break foams efficiently but also resist foams longer. 

Oil and Gas Field Industry

In the oil industry, the foam problems exist in many processes such as oil drilling and oil refinery.
Drilling Slurries: In the drilling process, mud-pump is used to push the slurries to the end-bit of the drilling rod along the central hollow space, then the slurries return to the ground along the hollow space between the drilling rod and hole-wall along with rock scraps. After the rock scraps precipitation in the slurry pond, the clean slurries will be reused. The water, adhesive clay, some inert impurities and particularly chemistry treatment agents being in the drilling fluid often cause plenty of foam. Moreover, these harmful foam can decrease the lubricity, the effect of cooling and efficiency of drilling fluid. On the process, CHEM SOURCES, designed silicone antifoam.
Oil Drilling: In the initial stage of oil drilling, the oil wells can spray itself. In the following drilling process, because of the decline of underground oil-layer pressure which becomes lower than natural gas saturation pressure, the natural gas precipitate and results in bubbles in the crude oil. This will not only affect the pump efficiency (The bubble expand during position rising, and compress during piston declining), but also makes production volume decline. The bubbles during this process will affect the oil-well volume output, and different defoamer should be used to break and inhibit different kinds of foams. There are two kinds of foam existing in the oil-well: positive charge bubble and negative charge bubble. For both the positive charge bubble and the negative charge bubble, antifoam bar which is principle part of organosilicone is added to proper position to reach defoaming efficiency.
Crude Oil Transportation: Low boiling point component, air and surfactants existing in it can often lead to excessive foam on the surface of raw oil during the course of transportation of crude oil. The method we suggest to our customers is to add Silicone oil antifoam by the means of continuous addition to transportation pipe or oil tank, which can eliminate foam in crude oil and raise the efficiency of transportation oil.
Oil Refinery: Mainly consists of distillation fractions at normal pressure and oil fermentation. The distillation fraction without defoamer will lead to the gasoline's colors darken. After defoamer addition, the resistance among towers is reduced, and pressure gap declined to the lowest design value so that production capacity of the tower is greatly enhanced. In the refining process, the use of silicone or silicone polyether defoamer is generally recommended.
Residual Oil Storage and Processing: In the residual oil storage, because of the high storage temperature, a lot of bubbles will occur when the water enters the storage pond and the safety can be guaranteed by adding a small amount of defoamer. In the depth processing of residual oil and delayed coke, because of the high temperature of 500 Celsius and the high speed of pump transmission, a lot of bubbles will be generated which decrease the equipment utilization frequency and affect the technical processing. But the situation will be greatly improved by the usage of silicone defoamer generally.
Finish Oil Storage and Transportation: The storage and transportation process of finished oil is related to pump operation, and the bubbles will easily occur under the pump's shearing effect. It is better to use the modified polysiloxane defoamer in this process.
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