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Silyl ether mixed defoaming agent emulsion and preparation method thereof

A technology of defoamer and composite emulsifier, applied in the direction of foam dispersion/prevention, etc., can solve problems such as poor water solubility, emulsion instability, easy demulsification, etc., achieve stable emulsion stability, benefit mass production, and chemical properties inert effect

Inactive Publication Date: 2015-11-11
杭州彤诚新材料技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although oil-based defoamers are cheaper, they have poor antifoaming ability, low defoaming rate, are not easy to disperse in water phase, and have narrow application areas.
Polyether defoamers have good water solubility and strong antifoaming ability, and are widely used in the fermentation industry, but their defoaming efficiency is low and the cost is high
Silicone defoamer has excellent defoaming properties, chemical stability, physiological inertness, cold resistance and heat resistance, but due to its poor water solubility, it must be emulsified with expensive emulsifiers before use, but the defoaming of its emulsion Both the antifoaming ability and the antifoaming ability have been greatly damaged, and its emulsion is also unstable and easy to break, which limits its use in the fermentation industry

Method used

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  • Silyl ether mixed defoaming agent emulsion and preparation method thereof
  • Silyl ether mixed defoaming agent emulsion and preparation method thereof
  • Silyl ether mixed defoaming agent emulsion and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Mix 100 parts of linear dimethyl silicone oil with 3 parts of modified white carbon black evenly, heat up to 130°C; add 3 parts of triethanolamine, stir for 3 hours, then cool to 90°; add 40 parts of allyl ether modified silicone oil and 25 parts of polyoxypropylene glyceryl ether, after continuing to stir for one hour; add 10 parts of compound emulsifiers and stir at a high speed to form a coarse emulsion, wherein the compound emulsifiers are mixed by 5 parts of Tween-80 and 5 parts of soybean lecithin; then Add 320mL of 0.5% hydroxymethyl cellulose thickening water to the coarse emulsion to prepare an emulsion with a solid content of 35%; then pour the emulsion into a high-speed homogenizer and stir at 12000r / min for 20min. A fine and stable microemulsion is formed; this microemulsion can be centrifuged in a 5000r / min centrifuge for 5 minutes without stratification.

[0028] Test method: Pour 100mL of bubbling liquid into a 500mL measuring cylinder, insert the glass t...

Embodiment 2

[0033] Mix 100 parts of linear dimethyl silicone oil with 5 parts of modified silica evenly, heat up to 130°C; add 5 parts of triethanolamine, stir for 3 hours, then cool to 80°; add 50 parts of allyl ether to modify Silicone oil and 35 parts of polyoxypropylene glyceryl ethers, continue to stir for 1h; Add 7 parts of compound emulsifiers and stir at high speed to form a coarse emulsion, wherein the compound emulsifiers are mixed by 3.5 parts of Tween-80 and 3.5 parts of soybean lecithin; Add 360mL of 0.5% hydroxymethylcellulose thickening water to the coarse emulsion to prepare an emulsion with a solid content of 35%; then pour the emulsion into a high-speed homogenizer and stir at 12000r / min for 25min to form Delicate and stable microemulsion; this microemulsion can guarantee that it will not be separated when centrifuged in a 5000r / min centrifuge for 5 minutes.

[0034] Test method: 35kg fermentation broth base material, 50L fermentation tank, first add 5g polyether defoame...

Embodiment 3

[0039] Mix 100 parts of linear dimethyl silicone oil with 3 parts of modified silica evenly, heat up to 130°C; add 2 parts of triethanolamine, stir for 3 hours, then cool to 80°C; then add 30 parts of allyl ether modified silicone oil And 30 parts of polyoxypropylene glyceryl ethers, continue to stir for 1h; Add 8 parts of compound emulsifiers and stir at high speed to form a coarse emulsion, wherein the compound emulsifiers are mixed by 4 parts of Tween-80 and 4 parts of soybean lecithin; Add 480mL of hydroxymethyl cellulose thickening water with a mass concentration of 0.3% to the emulsion to prepare an emulsion with a solid content of 25%; then pour the emulsion into a high-speed homogenizer and stir at a high speed of 12000r / min for 20min to form Delicate and stable microemulsion; this microemulsion can guarantee that it will not be separated in a 3000r / min centrifuge for 5 minutes.

[0040] Test method: 35kg fermentation broth base material, 50L fermentation tank, first a...

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Abstract

The invention discloses silyl ether mixed defoaming agent emulsion and a preparation method thereof. The silyl ether mixed defoaming agent emulsion is prepared from the following components: linear simethicone, allyl ether modified polysiloxane, polyoxypropylene glyceryl ether, modified white carbon black, triethanolamine and a compound emulsifier. The preparation method comprises the following steps: uniformly mixing the linear simethicone and the modified white carbon black, and heating to obtain a mixture I; adding triethanolamine into the mixture I, stirring and cooling to obtain a mixture II; adding the allyl ether modified polysiloxane and the polyoxypropylene glyceryl ether, and further stirring to obtain a mixture III; adding the compound emulsifier into the mixture III, and stirring at high speed to obtain coarse emulsion; adding thickening water into the coarse emulsion, and preparing raw emulsion; and pouring the raw emulsion into a high-speed homogenizer for stirring to obtain the fine-smooth and stable emulsion. The defoaming agent easily dissolves in water, and is small in specific surface area, high in defoaming speed, lasting in foam inhibition and small in use amount; the preparation method is convenient and easy to operate; the defoaming agent has no toxic effects on microorganisms, has an effect of promoting the growth of mycelia, is beneficial to microbial fermentation and is relatively environmentally friendly.

Description

technical field [0001] The invention relates to a method for preparing an emulsion of an antifoaming agent, in particular to a method for preparing an emulsion of a silicon ether composite antifoaming agent. Background technique [0002] In the production of most fermentation industries, a large amount of foam is often produced. The existence of foam will seriously affect the quality of the product, and even cause the production to fail. Adding a defoamer is a simple and economical defoaming method. Widely used in various fields of fermentation. There are many kinds of commercial defoamers at home and abroad, with different performances. They can be roughly divided into three categories from the composition, namely silicone type, polyether type and grease type. Pay attention to. Although oil-based defoamers are cheaper, they have poor antifoaming ability, low defoaming rate, are not easy to disperse in the water phase, and have narrow application areas. Polyether defoamer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
Inventor 张桂飞陶益舒剑崔海
Owner 杭州彤诚新材料技术有限公司
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