Method for preparing biomass polyoxyethylene ether carboxyl asymmetric gemini surfactant

A technology of polyoxyethylene ether monocarboxylate and polyoxyethylene ether, which is applied in the production of functional fine chemicals, can solve problems such as inability to use, and achieve the effects of increasing production, less irritation, and reducing rinsing times

Active Publication Date: 2013-09-18
JIANGSU SIXIN SURFACTANT TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the carboxymethylation modification of such surfactants, the foam is much higher than before, and the strong foaming power and good foam stabilization effect have brought a lot of inconvenience to use, and the HLB value (hydrophilic Lipophilic balance value) tends to be high, limiting its use in many fields

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Synthesis of coconut oil diethanolamide: put 1,585 kg of coconut acid in a stainless steel amidation reaction kettle, replace with nitrogen for 3 times, heat up to 100°C and start adding 915 kg of diethanolamine dropwise, and react after the dropwise addition The nitrogen gas distributor at the top of the kettle is vented with nitrogen. After the dropwise addition, the temperature in the reaction kettle is 120°C, and the temperature starts to rise. It takes 150 minutes to rise from 120°C to 170°C, and keep at 170°C for 2 hours, and then replace it with the nitrogen distributor at the bottom of the reaction kettle. Nitrogen was passed, the reaction temperature was increased to 180°C, and the temperature was kept for 4 hours. After completion, the temperature was lowered to 60°C and the material was discharged.

[0022] (2) Synthesis of cocoamide polyoxyethylene ether: put 1132 kg of coconut oil diethanolamide in a stainless steel stirred reactor, put 4 kg of catal...

Embodiment 2

[0026] (1) Synthesis of coconut oil diethanolamide: put 2,536 kg of coconut oil in a stainless steel amidation reaction kettle, replace with nitrogen for 3 times, heat up to 100°C and start adding 1,464 kg of diethanolamine dropwise, and react after the dropwise addition The nitrogen gas distributor at the top of the kettle is vented with nitrogen. After the dropwise addition, the temperature in the reaction kettle is 125°C, and the temperature starts to rise. It takes 150 minutes to rise from 125°C to 175°C, and keep at 175°C for 2 hours, and then replace it with the nitrogen distributor at the bottom of the reaction kettle. Nitrogen was passed, the reaction temperature was raised to 182, and the temperature was kept for 4 hours. After completion, the temperature was lowered to 60°C and the material was discharged.

[0027] (2) Synthesis of cocoamide polyoxyethylene ether: put 984 kg of coconut oil diethanolamide in a stainless steel stirred reactor, put 8 kg of catalyst s...

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Abstract

The invention discloses a method for preparing a biomass polyoxyethylene ether carboxyl asymmetric gemini surfactant. The method comprises the steps of: firstly, putting cocinic acid into a stainless steel reaction kettle, dropwise adding diethanol amine to carry out amidation, so as to prepare cocinic acid diethanloamides; putting the cocinic acid diethanloamides into an ethoxylation reaction kettle to react with ethylene oxide, so as to generate coconut oil amide polyoxyethylene ether; putting the coconut oil amide polyoxyethylene ether into a carboxy methylation reaction kettle, so that hydroxyl at one end and sodium chloroacetate are subjected to carboxyl methylation, so as to generate the coconut oil amide polyoxyethylene ether single sodium carboxylate; finally putting the coconut oil amide polyoxyethylene ether single sodium carboxylate into an esterification reaction kettle, so that the residual hydroxyl and the oleic acid are subjected to esterification reaction, so as to generate the novel biomass polyoxyethylene ether carboxyl asymmetric gemini surfactant SX. The emulsifier is small in thrill on eyes and skin of a human body, has excellent emulsibility and cleaning force, and good biodegradability, and is a biomass surfactant with good cost performance.

Description

technical field [0001] The invention relates to the technical field of production of functional fine chemicals. Background technique [0002] The structure of alcohol ether carboxylate modified by fatty alcohol polyoxyethylene ether is very similar to soap, but the embedded EO chain makes it have the characteristics of both anionic and nonionic surfactants, which is more resistant to hard water than soap and stronger than fatty alcohol polyoxyethylene Ether has a good temperature resistance effect, and its development is very rapid. Later, it was found that the initial toxicity and secondary toxicity of fatty monoethanolamide ether carboxylate were significantly lower than that of alcohol ether carboxylate, and its performance was equivalent to that of alcohol ether carboxylate. However, after the carboxymethylation modification of such surfactants, the foam is much higher than before, and the strong foaming power and good foam stabilization effect have brought a lot of inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G65/338C08G65/28C07C231/12C07C233/18B01F17/22B01F17/42C09K23/22C09K23/42
Inventor 王瑛胡小雷王利伟
Owner JIANGSU SIXIN SURFACTANT TECH
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