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High-efficiency defoaming agent for biological fermentation system and preparation process of high-efficiency defoaming agent

A bio-fermentation and defoamer technology, applied in the direction of foam dispersion/prevention, can solve the problems of reduced practical volume of fermenters, uneven product quality, foam overflow, etc., and achieve excellent foam suppression effect.

Active Publication Date: 2013-02-27
道尔达(西安)新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is: provide a kind of high-efficiency defoamer for biological fermentation system and preparation method thereof that has excellent defoaming effect and antifoaming persistence concurrently for microbial fermentation system, it solves the problems caused by aeration, The practical volume reduction of the fermenter caused by stirring, foam overflow, and uneven product quality

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A kind of high-efficiency defoamer for biological fermentation system, its preparation method comprises the following steps:

[0033] 1) Weigh raw materials according to the following parts by mass:

[0034] Take 15 kg of organopolysiloxane, 0.5 kg of hydrophobic fumed silica, 5 kg of polyether modified silicone oil, 0.2 kg of silicone resin, 4 kg of food-grade emulsifier, and 0.2 kg of food-grade dispersing thickener , the mass concentration is 0.2 kg of 10% sodium hydroxide solution and 40 kg of deionized water;

[0035] 2) Add 15kg of organopolysiloxane, 0.5kg of hydrophobic fumed silica and 0.2kg of silicone resin into an electric heating tank, raise the temperature to 180-240°C, and keep stirring for 1-3 hours to obtain silicone paste;

[0036] 3) When the viscosity of organopolysiloxane is below 20000CST, the emulsifier is added to the water phase, or the emulsifier is added to the oil phase.

[0037] Present embodiment adopts emulsifying agent to add...

Embodiment 2

[0047] Basically the same as Example 1, the difference is: organopolysiloxane is 25kg, hydrophobic fumed silica is 3kg, polyether modified silicone oil is 15kg, silicone resin is 2kg, food grade emulsifier is 10kg, food grade The dispersion thickener is 2kg, the mass concentration is 10% sodium hydroxide solution is 2kg and the deionized water is 80kg. The food-grade dispersing thickener is xanthan gum; the food-grade emulsifier is Tween, which belongs to nonionic surfactants.

[0048] The polyether-modified silicone oil was purchased from Qingdao Xingye Silicone New Material Co., Ltd., address: Zhujiang Road, Laixi Economic Development Zone, Qingdao, Tel. 86-0532-88431918. The main technical indicators of the polyether modified silicone oil: Appearance Light yellow transparent oily liquid; when the temperature is 25°C, the density is 1.03 g / cm 3 ; Viscosity is 1500~4000CS; Cloud point is 47℃; Active ingredient ≥99.5%.

Embodiment 3

[0050] Basically the same as Example 1, the difference is: organopolysiloxane is 20kg, hydrophobic fumed silica is 1.5kg, polyether modified silicone oil is 10kg, silicone resin is 1kg, food grade emulsifier is 8kg, food Grade dispersion thickener is 1kg, mass concentration is 10% sodium hydroxide solution is 1.2kg and deionized water is 50kg. The food-grade dispersing thickener is carboxymethyl cellulose; the food-grade emulsifier is sodium lauryl sulfate, which belongs to anionic surfactants.

[0051] If the viscosity of the organopolysiloxane is above 20000CST, it is prepared by adding an emulsifier to the oil phase:

[0052] 3-a) Stir and mix the silicone paste in step 2, 10kg of polyether-modified silicone oil and 8kg of food-grade emulsifier at 75°C for 1-3 hours;

[0053] 3-b) Add 25kg of deionized water to the mixture in step 3-a, emulsify and stir at 75°C for 1-3 hours to obtain an emulsion; the amount of deionized water: take 1 / 3-1 / 2 of the total amount of deio...

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Abstract

The invention relates to a high-efficiency defoaming agent for a biological fermentation system and a preparation process of the high-efficiency defoaming agent. The high-efficiency defoaming agent comprises 15-25 parts of organopolysiloxane, 0.5-3 parts of hydrophobic gaseous phase white carbon black, 5-15 parts of polyether modified silicone oil, 0.2-2 parts of silicon resin, 4-10 parts of a food-grade emulsifier, 0.2-2 parts of a food-grade dispersing thickening agent, 0.2-2 parts of a sodium hydroxide solution with the mass concentration of 10% and 40-80 parts of deionized water. The preparation process of the defoaming agent comprises that the organopolysiloxane, the hydrophobic gaseous phase white carbon black and the silicon resin are subjected to high-temperature bonding. If the viscosity of the organopolysiloxane is lower than 20000CST, a method for adding the emulsifier in an aqueous phase can be used, a method for adding the emulsifier in an oil phase can also be used, and if the viscosity of the organopolysiloxane is higher than 20000CST, the method for adding the emulsifier in an oil phase can be used for preparing the defoaming agent. The defoaming agent is fast in defoaming speed and high in foam inhibition ability. The defoaming agent is particularly excellent in terms of defoaming and foam inhibition effects in the microbial fermentation system, and no side effect is produced for production.

Description

technical field [0001] The invention relates to a defoamer, in particular to a high-efficiency defoamer used in a biological fermentation system and a preparation method thereof. It belongs to the field of chemical technology. Background technique [0002] The microbial fermentation system is a typical water-based system. During the fermentation process, due to the need to add a large amount of sterile fresh air to promote the growth of bacteria and increase the air supply volume, a large amount of foam will be generated, and the fermenter is often filled with foam. The existence of a large amount of foam will not only greatly reduce the actual available volume in the fermenter, causing the culture solution to overflow from the fermenter, but also affect the metabolic process of microorganisms, resulting in uneven products. Therefore, it is very important to eliminate the hazards of these foams. The common way to suppress these foams is to add polyether defoamers or silico...

Claims

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Application Information

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IPC IPC(8): B01D19/04
Inventor 杜伟锋公会良马玉慧
Owner 道尔达(西安)新材料有限公司
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