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Preparation of antifoaming agent for sugar industry

A defoamer, an industrial technology, applied in the field of defoamer preparation, can solve the problems of poor antifoaming effect, inability to obtain defoaming, single defoaming components, etc.

Active Publication Date: 2010-06-30
JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The defoamer mentioned in the patent ZL96194968.6 is mainly a polyether component, and the defoaming component is single, which cannot obtain the effect of defoaming and foam suppression. Although ZL92112223.3 mentions the use of polyether and organic Silicone is the defoaming component, and the silicone defoaming component used is a single low-viscosity silicone grease, which has a poor antifoaming effect

Method used

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  • Preparation of antifoaming agent for sugar industry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Preparation of low viscosity silicone grease

[0040] Mix 90 parts of 500mPa·s polydimethylsiloxane and 6 parts of silica A-200 at room temperature, add 3 parts of hexamethyldisilazane and 1 part of NaOH, and then Keep at 135°C for 5 hours, and keep negative pressure in the system to remove low molecules. Cool to room temperature to obtain low-viscosity silicone grease A.

Embodiment 2

[0042] Preparation of low viscosity silicone grease

[0043]Mix 92.5 parts of 1000mPa·s polydimethylsiloxane and 5 parts of A-200 white carbon black at room temperature, add 2 parts of methyltriethoxysilane and 1 part of Me4NOH, and then Keep it at 105°C for 4h, then raise the temperature to 150°C, keep it warm for 1h, and keep negative pressure in the system to remove low molecules. Cool to room temperature to obtain low-viscosity silicone grease B.

Embodiment 3

[0045] Preparation of High Viscosity Silicone Grease

[0046] Add 2000g of polydimethylsiloxane with a viscosity of 200,000mPa·s, 100g of MQ resin (M / Q ratio 1.0:1.0), 23g of catalyst S (note: composed of NaOH and polydimethylsiloxane) into a 5L vacuum mixer. Oxane is mixed according to the mass ratio of 10:90), and the temperature is raised to 120°C. After the reaction materials are reacted, 100g of hydrophobic white carbon black and 30g of hexamethyldisilazane are added, fully stirred evenly, and the temperature of the reaction system is controlled at 100°C Keep it warm for 4 hours, and finally react for another 2 hours at 160°C and a vacuum of -0.03 to -0.05MPa to make the reaction complete. Then cool to room temperature to obtain high-viscosity silicone grease C.

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Abstract

The present invention relates to a preparation of the antifoaming agent for the sugar industry, belonging to the field of fine chemicals agent. The antifoaming agent is composed of 50 to 90 percents of component A and 20 to 60 percents of component B, wherein the component A is composed of low-viscosity silicone grease, high-viscosity silicone grease, common carbon chain emulsifying agent, polyether modified polysiloxane, thickening agent, preservative and deionized water, and the component B is higher fatty alcohol polyether. The preparation method comprises the steps of: (1) mixing the low-viscosity silicone grease, high-viscosity silicone grease, common carbon chain emulsifying agent and polyether modified polysiloxane in proportion, heating to the temperature of 50 to 80 DEG C and keeping the temperature for 20 to 60 minutes; (2) adding the deionized water slowly, stirring quickly, adding the thickening agent, then adding the deionized water sequentially to the desired concentration and passing a colloid mill; (3) adding the preservative to obtain the component A; and (4) adding the component B into the component A finally, and stirring thoroughly to obtain the emulsion of antifoaming agent for the sugar industry.

Description

technical field [0001] The invention relates to the preparation of a defoamer used in the sugar industry. It achieves fast defoaming and foam suppression through the compounding and synergizing of high-viscosity silicone grease, low-viscosity silicone grease and high-grade fatty alcohol polyether. good purpose. Its invention relates to the preparation of fine chemical additives, therefore, the present invention belongs to the technical field of fine chemical preparations. technical background [0002] During the production process of the sugar industry, the sugar liquid is mixed with air under the influence of factors such as stirring, flow and transportation, and it is easy to produce a large amount of foam. The generation of foam often makes the sugar solution tank overflow, resulting in material loss, and more foam also affects the transportation of the sugar solution, resulting in difficult operation. In the evaporation and crystallization section, thick foam slows dow...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04B01F17/54C09K23/54
Inventor 吴飞曹治平钟翔曹添眭花兰
Owner JIANGSU SIXIN SCI-TECH APPL RES INST CO LTD
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