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Defoaming composition of polyether modified siloxane

A polyether modification, siloxane technology, applied in the directions of foam dispersion/prevention, chemical/physical process, dissolution, etc., can solve problems such as prolonged fermentation time, and achieve simple preparation process, long-lasting foam suppression effect, and defoaming efficiency. high effect

Active Publication Date: 2010-07-21
JIANGSU SAIOUXINYUE DEFOAMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the surface energy and low tension of the defoamer spread rapidly in the fermentation broth, the surface tension of the small bubble walls of the fermentation broth is reduced and the bubbles are broken into large bubbles, which inhibits the normal gas-liquid interface metabolism process during the fermentation process and shortens the fermentation time. extend

Method used

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  • Defoaming composition of polyether modified siloxane
  • Defoaming composition of polyether modified siloxane
  • Defoaming composition of polyether modified siloxane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Mass fraction meter, in 100 parts of polydimethyl silicone oil (Shanghai Huipu Industrial Chemicals), add 8 parts of ethylene oxide, propylene oxide and propylene glycol condensate (Germany BASF company PluronicL-62), in airtight vacuum reactor Add 0.01 parts of chloroplatinic acid as a catalyst, 10 parts of isopropanol as a solvent, react at room temperature for 2 hours, transfer to a fractionation tower to remove the catalyst with activated carbon, and heat and fractionate in a rectification column to obtain polyether modified non-toxic siloxane (I).

[0025] 80 parts of the obtained polyether modified siloxane (I), 10 parts of silicon dioxide particles (U.S. Evonik R106), 2.5 parts of sodium dodecylbenzenesulfonate, 7.5 parts of ethanol, at normal temperature The product was obtained under stirring for 30 minutes, which was recorded as A-1.

Embodiment 2

[0027] In terms of mass fraction, add 4 parts of ethylene oxide, propylene oxide and ethylenediamine condensate (Tetronics of German BASF company) to 100 parts of polydimethylsilicone oil (DC 350 of U.S. Dow corning company), and react in a closed vacuum Stir in the device, and add 0.01 part of chloroplatinic acid as a catalyst, 10 parts of toluene as a solvent, react at room temperature for 2 hours, add 0.2 parts of alkyl ethoxylamine (Berol OX-91 of Akzo Nobel Company), Transfer to fractionation tower and use active carbon to remove catalyst, heat fractionation in rectification column to obtain polyether modified siloxane (I).

[0028] 60 parts of obtained polyether modified siloxane (I), 20 parts of silicon dioxide particles (U.S. Evonik R106), 4.0 parts of sodium lauryl phosphate, 15 parts of ethanol, 1.0 parts of methylol The cellulose was stirred at room temperature for 30 minutes to obtain the product, which was recorded as A-2.

Embodiment 3

[0030] In terms of mass fraction, in 100 parts of polydimethylsilicone oil (DC 200 of U.S. Dow corning company), add 8 parts of ethylene oxide and propylene oxide condensation (Tergitol 15-S of U.S. Dow company), in a closed vacuum reactor Stir, and add 0.03 parts of chloroplatinic acid as a catalyst, 10 parts of toluene as a solvent, react at room temperature for 2 hours, transfer to a fractionation tower to remove the catalyst with activated carbon, and heat and fractionate in a rectification column to obtain polyether modified silicon oxide Alkane (I).

[0031] 70 parts of obtained polyether modified siloxane (I), 15 parts of silicon dioxide particles (U.S. Evonik company R106), 3.25 parts of sodium stearyl lactate, 0.5 part of sorbitol oleate, 11.25 parts of A 40% sodium ethylenediaminetetraacetic acid solution was stirred at room temperature for 30 minutes to obtain the product, which was designated as A-3.

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Abstract

The invention discloses a defoaming composition of polyether modified siloxane, which comprises the following components in percentage by weight: 60-80% of the polyether modified siloxane, 10-20% of silica particles, 2.5-4.0% of anionic surfactant, 7.5-15% of solvent and 0-1.0% of additive. The product of the invention is prepared by premixing the polyether modified siloxane and the silica particles evenly, then adding the surfactant, the solvent and the additive in proportion, and stirring for 30min at ordinary temperature. The invention not only has high defoaming efficiency and lasting antifoaming effect, but also can not affect the microbial fermentation process.

Description

technical field [0001] The invention relates to a defoaming composition, in particular to a polyether modified silicone defoaming composition. Background technique [0002] As we all know, in the late stage of fermentation production of various microorganisms such as oxytetracycline, tetracycline, gentamycin, penicillin, tylosin, xanthan gum, itaconic acid, etc., a large amount of fresh sterile air needs to be supplemented to promote the growth of bacteria. Increased air volume results in a large amount of foam generation. The existence of a large amount of foam not only greatly reduces the actual usable volume in the fermenter and affects the production capacity of the equipment, but also affects the metabolic process of microorganisms during the fermentation process, causing uneven products, and defoamers must be added for defoaming. [0003] According to different defoaming substances, defoamers can be divided into polyether type, organosiloxane type, long carbon chain a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F17/54B01D19/04C09K23/54
Inventor 杨柏忠
Owner JIANGSU SAIOUXINYUE DEFOAMER
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