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A kind of biodegradable defoamer and preparation method thereof

A biodegradable and defoaming agent technology, applied in the preparation of sugar derivatives, separation methods, sugar derivatives, etc., can solve the problems of low foam breaking efficiency, silicon spots, harsh use conditions, etc., to adapt to the pH range and be environmentally friendly , adapt to a wide range of PH, reduce the effect of surface tension

Active Publication Date: 2022-07-15
WEIHAI XIANGYU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] According to the development history of defoamers, defoamers can be divided into the following categories: 1. Mineral oils, amides, lower alcohols, fatty acids and fatty acid esters, and phosphate esters. Low foam efficiency, non-biodegradable, strong specificity, and harsh use conditions; 2. Polyether defoamers: strong foam suppression ability, but poor defoaming ability, narrow application field, low foam breaking efficiency, and long degradation cycle; 3 、Organosilicon defoamer: The defoaming spectrum is strong, but the use of organosilicon defoamer is prone to silicon spot and shrinkage. For example, in the evaporator system, it is easy to cause silicone oil pollution or silicate in the evaporator system. Scale pollution; the above-mentioned different types of defoamers have their own irreplaceable advantages, but also have indelible disadvantages

Method used

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  • A kind of biodegradable defoamer and preparation method thereof
  • A kind of biodegradable defoamer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A method for preparing a biodegradable defoamer, comprising the following steps:

[0026] (1) feed intake: in the autoclave, after putting in water, alkaline catalyst sodium hydroxide, and sophorolipid, the mass ratio of the addition of water and sophorolipid is 24:50, and alkaline catalyst sodium hydroxide and sophorolipid are The mass ratio of the amount of grease added is 0.2:100; first, nitrogen is introduced into the autoclave to replace the air in it, and the replacement operation is repeated 3 times. After the air is completely replaced, a certain amount of ethylene oxide is filled. The molar ratio of ethylene oxide and the amount of microbial fermentation biosurfactant added is 6:1, then fill with nitrogen to the pressure level of 0.4MPa in the autoclave, and then seal the autoclave;

[0027] (2) Heating reaction: in the autoclave, at a temperature of 140 ° C, the reaction is stirred for 2 hours, and a ring-opening polymerization reaction occurs between the soph...

Embodiment 2

[0031] A method for preparing a biodegradable defoamer, comprising the following steps:

[0032] (1) feed intake: in the autoclave, after dropping into water, alkaline catalyst potassium hydroxide, and sophorolipid, the mass ratio of the addition of alkaline catalyst potassium hydroxide and sophorolipid is 0.3:100, and water and sophorolipid are The mass ratio of the added amount of grease is 31:50; first, nitrogen is introduced into the autoclave to replace the air in it, and the replacement operation is repeated 3 times. After the air is completely replaced, a certain amount of ethylene oxide is filled, The molar ratio of ethylene oxide and the amount of sophorolipid added is 8:1, then fill with nitrogen to the pressure in the autoclave to 0.6MPa, and then seal the autoclave;

[0033] (2) Heating reaction: in the autoclave at 160°C, the reaction is stirred for 5h, and the ring-opening polymerization reaction occurs between the sophorolipid and ethylene oxide. After the react...

Embodiment 3

[0037] A method for preparing a biodegradable defoamer, comprising the following steps:

[0038] (1) Feeding: in the autoclave, after putting in water, alkaline catalyst sodium hydroxide and sophorolipid, the mass ratio of the addition of alkaline catalyst sodium hydroxide and sophorolipid is 0.25:100, water and sophorolipid are The mass ratio of the added amount of grease is 27:50; first, nitrogen is introduced into the autoclave to replace the air in it, and the replacement operation is repeated 3 times. After the air is completely replaced, a certain amount of ethylene oxide is charged, The molar ratio of ethylene oxide and the added amount of microbial fermentation biosurfactant is 7:1, then nitrogen is charged to the pressure in the autoclave to 0.5MPa, and then the autoclave is sealed;

[0039] (2) Heating reaction: in the autoclave at a temperature of 150 °C, the reaction is stirred for 3 hours, and a ring-opening polymerization reaction occurs between the sophorolipid ...

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Abstract

The invention relates to a biodegradable defoamer and a preparation method thereof, and solves the problems of the defoamer in the prior art that the defoaming efficiency is low and unstable, cannot be biodegraded, is prone to salt scale pollution, and has a narrow application field. question. The present invention provides a biodegradable defoamer, which is sophorolipid polyoxyethylene ether, and its molecular formula is RO(CH 2 CH 2 O) n H, wherein, a positive integer of 6≤n≤8, R is a lactone-type sophorolipid or / and an acid-type sophorolipid; and a preparation method thereof is also provided. The invention is widely used in the research and development and application technical fields of the defoamer.

Description

technical field [0001] The invention relates to the technical field of research and development and application of a defoaming agent, in particular to a biodegradable defoaming agent and a preparation method thereof. Background technique [0002] Defoamer is an additive that eliminates foam. In the process of production and application in the fields of coating, textile, medicine, fermentation, papermaking, water treatment and petrochemical industry, a large amount of foam will be generated, which will affect the product quality and production process. Based on the inhibition and elimination of foam, a specific amount of defoamer is usually added to it during production. [0003] According to the development history of defoaming agents, defoaming agents can be divided into the following categories: 1. Mineral oils, amides, lower alcohols, fatty acids and fatty acid esters, and phosphate esters Low foaming efficiency, non-biodegradable, strong specificity, and harsh use cond...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D19/04C07H1/00C07H15/08
CPCB01D19/0404B01D19/0495C07H15/08C07H1/00
Inventor 程晓婷张爱国周文
Owner WEIHAI XIANGYU TECH
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