Preparation method for stable higher fatty alcohol degassing agent

Abstract

The invention discloses a preparation method for a stable higher fatty alcohol degassing agent. The preparation method comprises the following steps: 1, feeding higher fatty alcohol, fatty acid ester, wax, a hydrophilic surfactant and Guerbet alcohol into a reaction kettle according to the ratio, heating to 75-95 DEG C, keeping the temperature, and stirring for 2 hours under the speed of 500 r / min to ensure that the system is uniformly mixed;2, heating the hydrophilic surfactant (which accounts for 0.01-10 percent of the whole system), deionized water and an adhesion controller according to a calculating ratio together to 75-95 DEG C, and keeping the temperature for 2 hours for later use; 3, quickly pouring liquid in the step 2 into a mixture in the step 1, emulsifying by a homogenizing machine under the temperature of 75-100 DEG C for 20-30 minutes, and then quickly adding biological polysaccharide alcohol (which accounts for 0.1-5 percent of the whole system) according to the calculating ratio for stirring for 20-60 minutes; 4, quickly cooling the mixed in the step 3 to 20-45 DEG C to obtain the stable higher fatty alcohol degassing agent.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, and in particular relates to a preparation method of a stable higher aliphatic alcohol degassing agent. Background technique [0002] Foam and foam are often accompanied by people's life and production, and sometimes need to use it, such as flotation, fire extinguishing, dust removal, washing, manufacturing foam ceramics and plastics, etc.; but sometimes it must be eliminated, because it brings great harm to industrial production. The hazards are mainly as follows: [0003] (1) Reduce production capacity. For example, in various biological fermentations (beer production, alcohol production, production of major antibiotics in medicine...), in order to prevent foam from appearing in the fermentation tank, reaction kettle, cooking tank and other equipment, the feeding coefficient must be greatly reduced, sometimes up to Less than 30%. [0004] (2) Due to the generation of foam, the reactio...

AI Technical Summary

Problems solved by technology

For example, in various biological fermentations (beer production, alcohol production, production of major antibiotics in medicine...), in order to prevent foam from appearing in the fermentation tank, reaction kettle, cooking tank and other equipment, the feeding coefficient must be greatly reduced, sometimes up to less than 30%

[0004] (2) Due to the generation of foam, the reaction material overflows the reactor, causing waste of raw materials

[0005] (3) Due to insufficient collision between raw materials, the reaction cycle is prolonged

[0006] (4) Cause a decline in product quality

For example, in the process of dyeing, printing and water-based paint in the textile industry, due to the retention of air bubbles, it will cause spots and defects on the finished cloth; the foam of pulp slurry will not only cause harm to environmental sanitation and worker health, but also have many holes in the finished paper. Serious decline in product quality

[0007] (5) Cause the operation to be passive, and the generation of foam makes the production unable to proceed normally

Due to the existence of foam, the measurement accuracy of the liquid level gauge is interfered, resulting in measurement errors, resulting in large fluctuations in the liquid density, causing the liquid level of the reactor absorption tower to be falsely high, resulting in an unbalanced operation, and even accidents

[0008] (6) Pollution of the environment and accidents: Due to the overflow of foam, it will inevitably pollute the production environment and its surrounding environment, and some even cause major accidents

For example, the patent CN1781574A introduces the method of using polyether emulsifiers formed by isomeric primary alcohols and ethylene oxide to stabilize fatty alcohol emulsions, and US5744066 introduces the use of isooctylphenol polyoxyethylene ethers and sulfates as emulsifiers to prepare fatty alcohols The method of class defoamer, US5807502 introduces the method for preparing fatty alcohol defoamer with the reaction product of C6~18 1,2-diol and ethylene oxide addition as emulsifier, CN101530759A has introduced the use of special fatty alcohol ring The combination of ethylene oxide propylene oxide copolyether and anionic surfactant, and the method of mixing synthetic fatty alcohol and natural fatty alcohol to prepare a stable and cheap fatty alcohol defoamer, CN101690857A introduces the use of special fatty alcohol epoxy The method that ethylene oxide propylene oxide copolyether and alkyl glycoside surfactant are combined to prepare natural higher fatty alcohol defoamer, CN101733039A has introduced the use of special fatty alcohol ethylene oxide propylene oxide copolyether and alkyl glycoside surface activity A method for preparing a synthetic high-level fatty alcohol defoamer by combining an agent, CN103572652A introduces a method of using a special structure of water-soluble polyacrylic acid high-carbon alcohol ester as the main raw material to prepare a fatty alcohol defoamer, and CN101718055A introduces the use of multiple A method for synergistically forming a stable fatty alcohol defoamer with sugar compounds, water-soluble styrene-maleamic acid copolymers and non-cationic surfactants, CN103298999A introduces the use of amphiphilic copolymer surfactants with special structures A method for preparing fatty alcohol defoamers in combination with anionic surfactants, but none of them has completely solved the problems of cost and long-term stability of the emulsion

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