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Organic silicon defoamer and preparation method thereof

A silicone defoamer, silicone technology, applied in the field of defoamers, can solve the problems of poor dilution stability and defoaming persistence, increased wastewater treatment costs, poor defoaming persistence, etc., to achieve defoaming lasting performance Outstanding, low cost, good dilution stability

Active Publication Date: 2014-03-19
SHENZHEN ANPIN SILICONE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing silicone defoamers have poor dilution stability and defoaming persistence, and are prone to oil floating or demulsification. The silicone in it is gradually separated and precipitated due to the violent stirring of the wastewater during the wastewater treatment process, which reduces the defoaming activity. , Poor defoaming persistence often leads to repeated addition of defoaming agent, which increases the cost of wastewater treatment

Method used

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  • Organic silicon defoamer and preparation method thereof
  • Organic silicon defoamer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of organosilicon defoamer includes the following steps:

[0032] Grind the MQ silicone resin with an M / Q value of 0.8 to a particle size of 5-20 μm to obtain MQ silicone resin particles;

[0033] Take 200g of hydroxy silicone oil with a viscosity of 80,000mPa·s at 25°C and 5.7g of specific surface area of ​​238m 2 / g of hydrophobic fumed silica (manufactured by Guangzhou Jibisheng, HB-630) and 14.3g of MQ silicone resin particles. After mixing, stir evenly at a low speed of 250rpm, heat to 210℃, and then stir at a high speed at 5500rpm for reaction 2 When the mixture is brown or close to brown, the reaction is considered complete, the heating is stopped, and the mixture is stirred and cooled to below 80°C at a low speed of 300 rpm to obtain a silicone paste composition;

[0034] 9.5g sorbitan monostearate, 9g polyoxyethylene sorbitan monostearate and 1.5g ethylene glycol were mixed to obtain an emulsifier, wherein sorbitan monostearate and poly The oxye...

Embodiment 2

[0037] The preparation method of organosilicon defoamer includes the following steps:

[0038] Grind the MQ silicone resin with an M / Q value of 0.9 to a particle size of 5-20 μm to obtain MQ silicone resin particles;

[0039] Take 200g of hydroxy silicone oil with a viscosity of 20000mPa·s at 25℃, 1.7g of specific surface area is 150m 2 / g of hydrophobic fumed silica (manufactured by Guangzhou Jibisun, HB-630) and 11.1g of MQ silicone resin particles. After mixing, stir at low speed at 300rpm and mix evenly. Heat to 250℃, and then react at high speed at 6000rpm. 4 hours, until the mixture is brown, close to brown, it is deemed that the reaction is complete, the heating is stopped, and the mixture is stirred and cooled to below 80°C at a low speed of 300 rpm to obtain a silicone paste composition;

[0040] Mix 10 sorbitan monooleate, 4g sorbitan monolaurate, 6.5g fatty alcohol polyglycol ether (Haian Petrochemical, O-15) and 3.5g glycerin to obtain an emulsifier. Sorbitan monostearat...

Embodiment 3

[0043] The preparation method of organosilicon defoamer includes the following steps:

[0044] Grind the MQ silicone resin with an M / Q value of 0.5 to a particle size of 5-20 μm to obtain MQ silicone resin particles;

[0045] Take 200g of methyl silicone oil with a viscosity of 60000mPa·s at 25℃, 5.8g of specific surface area is 238m 2 / g of hydrophobic fumed white carbon black (manufactured by Guangzhou Jibisheng, HB-630) and 22.2g of MQ silicone resin particles. After mixing, stir at low speed at 300 rpm and mix evenly. Heat to 230°C, and then react at high speed at 6000 rpm. 3 hours, until the mixture is brown or close to brown, it is deemed that the reaction is complete, the heating is stopped, and the mixture is stirred and cooled to below 80°C at a low speed of 300 rpm to obtain a silicone paste composition;

[0046] Mix 7g sorbitan monostearate, 3g polyoxyethylene sorbitan monostearate and 1.3g polyoxyethylene stearate (Haian Petrochemical, SG-6) to obtain an emulsifier, where...

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Abstract

The invention discloses an organic silicon defoamer and a preparation method thereof. The organic silicon defoamer is obtained by emulsifying an organic silicon defoaming composition. The organic silicon defoaming composition comprises a silicon paste composition, emulsifiers and auxiliaries, wherein the silicon paste composition comprises polysiloxane, hydrophobic fumed silica and MQ silicon resin particles; polysiloxane is methyl silicone oil or hydroxyl silicone oil with viscosity of 10000-500000mPa.s; the particle sizes of the MQ silicon resin particles are 5-20mu m; the specific surface area of hydrophobic fumed silica is 100-300m<2> / g; the auxiliaries include tributyl phosphate and / or polypropylene glycol. The invention further provides the preparation method of the organic silicon defoamer. The organic silicon defoamer with high defoaming speed, long foam inhibition time, excellent dispersing performance and prominent defoaming permanence is prepared by a special method, has good storage and dilution stability, is not easy to demulsify and is free from floating oil. The preparation method is simple and is low in cost.

Description

Technical field [0001] The invention relates to the technical field of defoamers, in particular to an organosilicon defoamer for industrial wastewater defoaming and a preparation method thereof. technical background [0002] In most industrial production processes, a large number of bubbles will cause trouble, such as affecting production efficiency, causing equipment damage, or even causing production failure in severe cases. In industrial wastewater, domestic wastewater, electroplating wastewater, printing and dyeing wastewater, petrochemical wastewater, manufacturing In the industrial wastewater treatment fields such as sugar wastewater, starch wastewater, alcohol wastewater, and papermaking black liquor, the influence of bubbles is particularly common, and the problem of defoaming needs to be solved. The defoaming in the wastewater treatment process belongs to the defoaming of water-based systems. At present, most commonly used defoaming agents are silicone defoaming agents, ...

Claims

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Application Information

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IPC IPC(8): C02F1/20
Inventor 丁小卫钱柏太欧阳涛
Owner SHENZHEN ANPIN SILICONE MATERIAL
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