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Preparation method for ethoxyl sodium sulfonate fatty acid ester

A technology of sodium isethionate and fatty acid ester, applied in the preparation of sulfonate, organic chemistry and other directions, can solve the irritation of hydrogen chloride and phosphorus trichloride, and does not control the carbon number of sodium isethionate fatty acid ester Distribute color, odor, environmental pollution and other problems to achieve the effects of less environmental pollution, simple preparation method and rich source of raw materials

Active Publication Date: 2012-07-18
JILIN AEGIS CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are also many problems, such as the by-product hydrogen chloride needs to be dealt with; phosphorus trichloride has irritation and environmental pollution problems
[0004] Another method avoids many problems brought by acid chlorides, using fatty acid and sodium isethionate as raw materials, and heating and synthesizing sodium isethionate fatty acid ester in the presence of a catalyst. This direct esterification method has been favored in recent years. In 2004, the School of Materials and Chemical Engineering of Zhengzhou Institute of Light Industry published the synthesis method of sodium isethionate fatty acid ester. The direct esterification method in the literature did not control the sodium isethionate fatty acid ester. Carbon number distribution in ester (carbon number distribution in ester and carbon number distribution in free acid), color, odor

Method used

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  • Preparation method for ethoxyl sodium sulfonate fatty acid ester
  • Preparation method for ethoxyl sodium sulfonate fatty acid ester
  • Preparation method for ethoxyl sodium sulfonate fatty acid ester

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Experimental program
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Embodiment 1

[0035]Raw materials are taken by proportioning amount, coconut oleic acid: 588.7kg melts ahead of time, sodium isethionate aqueous solution: 579.5kg (61.09%), vegetable type stearic acid: (addition amount is 106kg for the first time; Addition for the second time The amount is 174kg) melted in advance, zinc oxide ZnO: 1.8kg, 106kg of stearic acid and other raw materials are added to the reaction kettle, and the temperature is raised to 100-160°C for 90 minutes, and the temperature is raised to 221°C to start the esterification reaction. The reaction temperature is 240±2°C , the reaction time is maintained for 60 minutes, and then the reaction temperature is increased to 245°C for 10 minutes. The fatty acid evaporated during the esterification is condensed and refluxed into the reactor, and the vacuuming operation is started. When the vacuum degree reaches 30kPa, start to add the first The second part of stearic acid is 174kg, and the flow rate is controlled to add for 30-40 minu...

Embodiment 2

[0039] The raw materials were weighed, 513kg of coconut oleic acid was melted in advance, 540kg (57.23%) of sodium isethionate was dissolved in water, 89.7kg of plant-type stearic acid was melted in advance, and 1.42kg of zinc oxide ZnO was added to the reaction kettle and filled with nitrogen for protection. The temperature of the reaction kettle was raised to 100-160°C for 100 minutes, and the temperature was raised to 221°C to start the esterification reaction, and the temperature was continued to 240±2°C, and after 70 minutes of reaction, the reaction temperature was raised to 245°C and maintained for 10 minutes (the fatty acid evaporated during the esterification period was passed through condensed back into the reactor). Start to enter the vacuum operation, and blow nitrogen. When the vacuum reaches 30kPa, add 148kg of stearic acid for the second time, and the stearic acid addition time is 38 minutes. Take out 167L of fatty acid, make up nitrogen to make the reactor retu...

Embodiment 3

[0042] Take raw material by proportioning amount, coconut oleic acid 451.24kg melts ahead of time, sodium isethionate aqueous solution 464.79kg (58.62%), plant type stearic acid 79kg melts ahead of time, zinc oxide ZnO 1.25kg, add in the reactor, fill Nitrogen protection. The temperature of the reaction kettle was raised to 100-160°C for 90 minutes, and the temperature was raised to 221°C to start the esterification reaction, and the temperature was continued to rise to 240°C, maintained at 240±2°C for 60 minutes, and then the reaction temperature was raised to 245°C for a total reaction time of 90 minutes (during esterification The distilled fatty acid is refluxed into the reactor by condensation). Start vacuuming of the reactor, nitrogen bubbling, when the vacuum reaches 30kPa, add 130kg of stearic acid, add stearic acid for 30 minutes, the vacuum reaches 3kPa, the minimum temperature of the reactant drops to 234°C, take out 73L of fatty acid, replenish Nitrogen makes the r...

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Abstract

The invention relates to a preparation method for compounding an ester by using fatty acid and ethoxyl sodium sulfonate and especially relates to a preparation method for an ethoxyl sodium sulfonate fatty acid ester. The preparation method comprises the following steps: performing esterification reaction on coconut oleic acid (after being processed), stearic acid, ethoxyl sodium sulfonate and catalyst (ZnO), reducing the pressure, and adding the stearic acid for the second time, thereby obtaining the product of the ethoxyl sodium sulfonate fatty acid ester containing 65-77% of active matters.The aspects of color, smell and carbon number distribution cause the product to be better applied to preparation of the cleaning skin-care products, such as soap, facial cleaner, shower gel and shampoo.

Description

technical field [0001] The invention relates to a preparation method for synthesizing esters with fatty acid and sodium isethionate, in particular to a preparation method for sodium isethionate fatty acid ester. Background technique [0002] Sodium isethionate fatty acid ester (SCI) is a class of anionic surfactants that use natural oils as raw materials. Due to its mildness, good foaming performance, and extremely low skin irritation, it has attracted attention, and because of its stable weak acidity, it has become the preferred raw material for skin care block detergents and ideal for liquid bath products in Europe and the United States. additive. The skin feels soft, smooth and silky after washing the personal care products added with SCI. It is not affected by hard water during use, and it can retain moisture when used in face wash, bath and shampoo products, making hair easier to comb. [0003] At present, SCI is still in the initial stage of industry development in ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C309/12C07C303/32
Inventor 苏建国
Owner JILIN AEGIS CHEM
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