Polyether antifoaming agent and preparation method thereof

Abstract

The invention belongs to the field of chemical auxiliaries and particularly relates to a polyether antifoaming agent and a preparation method thereof. The polyether antifoaming agent is prepared from, by weight, 89-95% of polyoxypropylene oxyethylene glycol ether, 0.6-2.1% of fatty high-carbon alcohols, 4-7.7% of silicon grease and silicon oil, 0.1-0.5% of a penetrating agent, 0.1-0.2% of a catalyst, 0.1-0.2% of a diffusing agent and 0.1-0.3% of a stabilizer, wherein viscosity of the silicon oil is 260mpa.s. The polyether antifoaming agent is high in stability, antifoaming strength and antifoaming speed, and nutrients are provided for hyphae in a fermentation process while toxicity is reduced. In addition, the polyether antifoaming agent is effective in foam elimination and inhibition in industries of papermaking, fermentation, foods, medicines and the like.

Description

technical field [0001] The invention belongs to the field of chemical auxiliary agents, and in particular relates to a polyether defoamer and a preparation method thereof. Background technique [0002] In the industrial production process of synthetic latex, papermaking, textile, food, fermentation, medicine, etc., many foams, even harmful foams, are often produced, which affect the normal production, which requires the use of defoamers to eliminate or suppress them. At present, there are many kinds of defoamers at home and abroad. Mainly include: grease defoamer, silicone defoamer and polyether defoamer, etc. Among them, the defoaming performance of grease-based defoamers is low, and the usual dosage is 20-60 times that of silicone-based and polyether-based defoamers. However, its ability to eliminate dense foam is poor. Silicone defoamers generally include polydimethylsiloxane, etc. Although these defoamers have high defoaming efficiency, their antifoaming effect is not...

AI Technical Summary

Problems solved by technology

Polyether defoamers mainly include straight-chain polyether, etc., which have strong antifoaming ability and are currently the leading defoamers used in the fermentation industry, but their defoaming speed is slower than that of silicone defoamers, which cannot keep up with fermentation foaming speed, which affects the effect of defoaming, and because the polyoxyethylene chain of the hydrophilic chain has low toxicity, it will hinder the growth of bacteria and kill a small amount of bacteria cells when used in the fermentation process. affect the efficiency of fermentation

[0003] Polyether "330", "PPG", and "GP" polyoxypropylene ether, because their chain ends are hydrophobic chains, are not easy to disperse in the fermentation broth, resulting in slow defoaming speed, which cannot keep up with the foaming speed of fermentation. Affected the defoaming effect

"GPE", "PPE", "3010", polyoxypropylene oxyethylene glyceryl ether, although the defoaming performance of the previous defoamers has been improved, but because of the low toxicity of the hydrophilic polyoxyethylene chain, In the fermentation production, the phenomenon of hindering the growth of bacteria and killing a small amount of bacteria cells occurs, which affects the fermentation efficiency.