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Dianionic surfactant containing acylamino and synthesis method thereof

A technology of surfactant and dianion, which is applied in the field of amide-containing dianion surfactant and its synthesis, can solve the problems of poor resistance to hard water, etc., and achieve the effects of convenient operation, simple synthesis process, and good biodegradability

Active Publication Date: 2019-01-01
GUANGDONG YESER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Qiao Mengzhan, Zhao Na, etc. synthesized a double anionic surfactant (Dianionic surfactant oil displacement agent and its preparation method and application, CN 104927823 A), which contains two carboxylate anions or one carboxylate anion in the molecular structure Acid group and a sulfonic acid group anion, compared with conventional anionic surfactants, its wetting performance is more prominent, and it is easily soluble in water, but relatively speaking, this double anionic surfactant has poor resistance to hard water and is easy to Form precipitates with calcium and magnesium ions in water

Method used

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  • Dianionic surfactant containing acylamino and synthesis method thereof
  • Dianionic surfactant containing acylamino and synthesis method thereof
  • Dianionic surfactant containing acylamino and synthesis method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of amido-containing dianion surfactant, its structural formula is as follows:

[0034]

[0035] where R is CH 3 CH 2 CH 2 CH 2 .

[0036] (1) Add 0.2mol oleic acid, 0.21mol N-butylethanolamine and 0.25g sodium hydroxide into the reaction kettle, under the protection of nitrogen, stir, heat up to 180°C, react for 5h, stop the reaction, vacuumize to remove the reaction product of water to obtain Intermediate A.

[0037] (2) Add 0.2 mol of intermediate A into the reaction kettle, stir under nitrogen protection, heat up to 100°C, slowly add 19.5g of 50% sodium hydroxide solution dropwise, after the dropwise addition, react at constant temperature for 5h, and cool down To 40°C, add dropwise a solution prepared by 0.21 mol of sodium chloroacetate into the reactor, and react at a constant temperature for 4 hours to obtain a crude product, which is refined to obtain intermediate B.

[0038] (3) Add 0.2 mol of intermediate B and 0.21 mol of sodium bisulfite into ...

Embodiment 2

[0040] A kind of amido-containing dianion surfactant, its structural formula is as follows:

[0041]

[0042] where R is CH 3 (CH 2 ) 6 CH 2 .

[0043] (1) Add 0.2mol oleic acid, 0.23mol N-octylethanolamine and 0.5g sodium hydroxide into the reaction kettle, under the protection of nitrogen, stir, heat up to 190°C, react for 6h, stop the reaction, vacuumize to remove the reaction product of water to obtain Intermediate A.

[0044] (2) Add 0.2 mol of intermediate A into the reaction kettle, stir under the protection of nitrogen, heat up to 105°C, slowly add 20.6g of 50% sodium hydroxide solution dropwise, and react at constant temperature for 4.5h after the addition is completed. The temperature was lowered to 40°C, and then a solution prepared by 0.23 mol of sodium chloroacetate was added dropwise to the reaction kettle, and the reaction was carried out at a constant temperature for 4.5 hours to obtain a crude product, which was refined to obtain intermediate B.

[00...

Embodiment 3

[0047] A kind of amido-containing dianion surfactant, its structural formula is as follows:

[0048]

[0049] where R is

[0050] (1) Add 0.2mol oleic acid, 0.22mol N-cyclohexylethanolamine and 0.34g potassium hydroxide into the reaction kettle, under the protection of nitrogen, stir, heat up to 200°C, react for 4 hours, stop the reaction, and remove the reaction product by vacuuming of water to obtain Intermediate A.

[0051] (2) Add 0.2 mol of intermediate A into the reaction kettle, stir under the protection of nitrogen, heat up to 110°C, slowly add 18.3g of 50% sodium hydroxide solution dropwise, after the dropwise addition, react at constant temperature for 4 hours, and cool down After reaching 50°C, add dropwise a solution prepared by 0.22 mol of sodium chloroacetate into the reaction kettle, and react at a constant temperature for 5 hours to obtain a crude product. After the crude product is refined, intermediate B is obtained.

[0052] (3) Add 0.2 mol of interme...

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Abstract

The invention discloses a dianionic surfactant containing acylamino and a synthesis method thereof. The synthesis method comprises the following steps: adding oleic acid, N-alkyl ethanolamine and a catalyst into a reaction kettle, thereby obtaining an intermediate A; adding the intermediate A into a reaction kettle, slowly dropwise adding 50% of a sodium hydroxide solution, dropwise adding a sodium chloroacetate solution into the reaction kettle, thereby obtaining an intermediate B; and adding the intermediate B and sodium hydrogen sulphite into the reaction kettle, thereby obtaining the dianionic surfactant containing acylamino. The synthesis process is simple, and is convenient to operate; the synthesized dianionic surfactant has good wetting, foaming and dirt-removing properties, good biological degradability, good hard water resistance and the like.

Description

technical field [0001] The invention relates to the field of anionic surfactants, in particular to an amide group-containing dianionic surfactant and a synthesis method thereof. Background technique [0002] Dianionic surfactants refer to a class of anionic surfactants containing two hydrophilic groups in the molecular structure. Compared with traditional anionic surfactants, dianionic surfactants have one more identical or different hydrophilic groups. group, and the connected hydrophobic groups can be one or more. Due to the difference in structure between the double anionic surfactant and the traditional single anionic surfactant, the double hydrophilic anionic surfactant is endowed with good wetting, hard water resistance, cold water and acidic environment characteristics, when the introduction of the hydrophilic anionic When it is in the middle of surfactant molecules, it shows better wetting performance and foaming performance. [0003] At present, the research on di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/17C07C303/32B01F17/22C09K23/22
CPCC07C231/02C07C231/12C07C303/32C07C309/17C07C2601/08C09K23/00
Inventor 谢妃军余培荣梁子钦成晓玲
Owner GUANGDONG YESER IND CO LTD
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