| What is the composition of various defoamers |
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| Nantong xinbaoyuan Chemical Co., Ltd. mainly deals in various surfactants and industrial auxiliaries. The products include emulsifier, leveler, penetrant, polyethylene glycol, polypropylene glycol, polyether, Sipan, tween, chemical fiber oil agent raw material, defoamer, antistatic agent, softener, fatty alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, polyethylene glycol fatty acid ester, castor oil polyoxyethylene ether, Textile Pretreatment assistant, polycarboxylic acid water reducer raw material (allylpolyethylene glycol, polyoxyethylene glycol Glycol monomethyl ether) and so on. Defoamers are generally made by multi-component compounding. The performance of main defoamers can be improved by the combination of surfactants. Whether a specific substance is suitable for demulsification depends on its application conditions. For example, polyether is a defoamer under the condition of acid and alkali, and a foaming agent under the condition of partial alkali. It works at low temperature, but fails at high temperature. The first is defoamer. Hair alcohol defoamer is a kind of defoamer designed for hair alcohol process, which is divided into oil soluble defoamer and compound raw material oil defoamer. It is used for demulsification of various hair alcohol processing processes, such as erythromycin, jiemycin, avermectin, gentamycin, cephalosporins, sodium citrate, lysine, yeast to produce the main hair alcohol demulsification process, which is also used in feed processing and later acquisition process. Secondly, organosilicon defoamer. If the diluent of organosilicon material is generally several kinds of things: crude oil organic solvent, xylene, water-soluble diluent can be drained. In general, the pure silicone materials have the taste of polyether, which is slightly irritating. If the smell of automobile gasoline or xylene is detected, it can be evaluated as diluent. If it can't be determined, then test a volatile, weigh enough, put the industrial defoamer in a high-temperature resistant vessel, heat it to 130 ℃, bake it for 30 minutes to half an hour, if the detected volatile exceeds 5%, it can be evaluated as diluent. (1) Adding point of defoamer: defoamer is generally added to bleaching agent and cleaning section in paper mill, and is generally added to pulp washer, thickener and pulp tank. Defoamer in papermaking section is generally added into the headbox, pulp tank, sizing and mixing and pressing place of paper machine. (2) Amount of defoamer added: generally, two defoamers are more economical and effective than one with higher content, and they are added separately in the parts far away from each other. For example, a defoamer is added in front of the beater, and another defoamer is added in the headbox by the water treatment defoamer manufacturer. (3) Solution of defoamer settling: for example, amide defoamer will cause settling and then screen plate seam blocking, and paper diseases such as multiple eye spots of paper fish will be caused due to poor dispersion. Some defoamers will also produce some dry flex on the function of glue mixing and improving. Therefore, the high moisturizing emulsion system has excellent demulsification effect in high and low viscosity press building coatings. At present, industrial defoamers are mostly used in food, building coatings, petrochemical equipment and other industries, and the types of defoamers used in different industries are also very different. Because defoamers are mainly liquid and bottled, many people think that industrial defoamers are dangerous goods. |
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