Preparation method of high-temperature-resistant anti-foaming agent

A defoamer and high-temperature-resistant technology, which is applied in the field of preparation of high-temperature-resistant defoamers, can solve the problems of non-permanent foam suppression and slow defoaming rate of defoamers at high temperatures, so as to achieve faster defoaming rate, enhanced dispersion ability, The effect of reducing the propensity to aggregate

Active Publication Date: 2018-06-08
嘉兴沃特泰科环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main technical problem to be solved by the present invention is to provide a preparation method of a high-temperature-resistant defoamer for the defoamer’s defects of slow high-temperature defoaming rate and unsustainable foam suppression

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0023] Weigh 400g of poplar wood into a pulverizer, pulverize for 1 hour, pass through a 60-mesh sieve to obtain a sieved powder, weigh 10g of the sieved powder and place it in a Soxhlet extractor, and mix phenylethyl alcohol and water in a volume ratio of 2:1 at room temperature Mix to obtain a phenylethanol solution, then pour 300mL of the phenylethanol solution into a Soxhlet extractor, extract at 90°C for 6 hours, and remove the extract to obtain crude cellulose; put the crude cellulose into a beaker, Add 50mL of sodium chlorite solution with a mass fraction of 20% into the beaker, adjust the pH of the solution to 4.8 with glacial acetic acid with a mass fraction of 95%, and heat it at 75°C for 5 hours to remove lignin and obtain hemcellulose ; use 130mL of sodium hydroxide solution with a mass fraction of 25%, soak the cellulose at 90°C, soak in heat for 2h, filter and remove the filtrate to obtain purified cellulose, and make the purified cellulose into a water solution w...

example 2

[0025]Weigh 450g of poplar and put it into a pulverizer, pulverize for 1.5h, pass through a 60-mesh sieve to obtain a sieved powder, weigh 12g of the sieved powder and place it in a Soxhlet extractor, and mix phenylethyl alcohol and water at room temperature in a volume ratio of 2: 1 Mix to obtain phenylethanol solution, then pour 350mL of phenylethanol solution into a Soxhlet extractor, extract at 95°C for 7 hours, remove the extract, and obtain crude cellulose; put the crude cellulose into a beaker, Add 55 mL of sodium chlorite solution with a mass fraction of 20% to the beaker, adjust the pH of the solution to 5.0 with glacial acetic acid with a mass fraction of 95%, and heat it at 78°C for 6 hours to remove lignin and obtain heddle fibers Sodium cellulose; use 150mL of sodium hydroxide solution with a mass fraction of 25%, soak the cellulose at 95°C, soak for 2.5 hours at a heat preservation, filter and remove the filtrate to obtain purified cellulose, and make the purified...

example 3

[0027] Weigh 500g of poplar and put it into a pulverizer, pulverize for 2 hours, pass through a 60-mesh sieve to obtain a sieved powder, weigh 15g of the sieved powder and place it in a Soxhlet extractor, and mix phenylethyl alcohol and water at a volume ratio of 2:1 at room temperature Mix to obtain a phenylethanol solution, then pour 400mL of the phenylethanol solution into a Soxhlet extractor, extract at 100°C for 8 hours, remove the extract, and obtain crude cellulose; put the crude cellulose into a beaker, Add 60mL of sodium chlorite solution with a mass fraction of 20% to the beaker, adjust the pH of the solution to 5.2 with glacial acetic acid with a mass fraction of 95%, and incubate at 80°C for 7 hours to remove lignin and obtain hemcellulose With 160mL mass fraction of 25% sodium hydroxide solution, under the condition of 100°C, soak the whole cellulose, keep it soaked for 3h, filter and remove the filtrate to obtain purified cellulose, and make the purified cellulose...

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Abstract

The invention discloses a preparation method of a high-temperature-resistant anti-foaming agent, and belongs to the technical field of anti-foaming agent preparation. Poplar wood is used as raw materials and is subjected to crushing, extraction, lignin removal and ultrasonic crushing to obtain lignin nanometer cellulose; then, methylsilicone oil soaking is performed; high-speed dispersion is performed with fumed silica to obtain the high-temperature-resistant anti-foaming agent; the wettability with an organic phase and the dispersibility are improved; at a high temperature, the oil phase diffusion speed of the nanometer cellulose is accelerated; the outer surface energy of surrounding bubbles is reduced, so that bubble breaking is caused; under the high-temperature conditions, the anti-foaming speed of the methylsilicone oil is accelerated to a certain extent; the methylsilicone oil achieving the anti-foaming effect has better chemical stability and cannot easily react with substancesin a foaming system; the affinity of the methylsilicone oil on cellulose is better than the affinity of water; the viscosity is high; the dissolution degree in the water is very low, so that the anti-foaming time of equivalent anti-foaming agent is longer; the pore structure of the cellulose is favorable for conversion of big foam into small bubbles, so that the anti-foaming effect of the anti-foaming agent is enhanced; the foam inhibition time is long; the application prospects are wide.

Description

technical field [0001] The invention discloses a preparation method of a high-temperature-resistant defoamer, which belongs to the technical field of defoamer preparation. Background technique [0002] Antifoaming agent, also known as antifoaming agent, is a food additive that reduces surface tension during food processing, inhibits foam generation or eliminates foam that has already occurred. The defoamers approved for use in my country include emulsified silicone oil, high-carbon alcohol fatty acid ester compound, polyoxyethylene polyoxypropylene pentaerythritol ether, polyoxyethylene polyoxypropylene alcohol amine ether, polyoxypropylene glyceryl ether and polyoxypropylene polyoxygen 7 types including vinyl glyceryl ether and polydimethylsiloxane. It is mainly applicable to circuit board process, chemical industry, electroplating, printing and dyeing, papermaking, medicine, water-based ink, ceramic slitting, steel plate cleaning, aluminum processing, various sewage treatm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D19/04
CPCB01D19/0404B01D19/0409
Inventor 管小梅何少雄陈可
Owner 嘉兴沃特泰科环保科技股份有限公司
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