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Alpha-sulfonated fatty acid ester neutralization method

A technology of sulfo fatty acid ester and air outlet, which is applied in the field of α-sulfo fatty acid ester neutralization method, can solve the problems of difficult product quality control, slow removal of reaction heat, long neutralization time, etc., and achieves high product quality , Good neutralization effect and uniform mixing of materials

Inactive Publication Date: 2009-07-08
威海金轮化工有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method is difficult to mix evenly in a short time, and needs to be mixed repeatedly, the neutralization time is long, the reaction heat is also removed slowly, and the product quality is not easy to control

Method used

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  • Alpha-sulfonated fatty acid ester neutralization method
  • Alpha-sulfonated fatty acid ester neutralization method
  • Alpha-sulfonated fatty acid ester neutralization method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The bleached α-sulfo fatty acid ester is dissolved in methanol, and the weight of methanol in the α-sulfo fatty acid ester solution is 50% of the weight of the α-sulfo fatty acid ester.

[0036] Sodium alkoxide is soluble in alcohol, and the concentration of lye is 10% by weight. The neutralization temperature is 40°C.

[0037] Then the two are mixed and neutralized to PH=7.5.

Embodiment 2

[0039] The bleached α-sulfo fatty acid ester is dissolved in methanol, and the weight of methanol in the α-sulfo fatty acid ester solution is 100% of the weight of the α-sulfo fatty acid ester, which is a weight ratio.

[0040] Potassium alkoxide is soluble in alcohol, and the concentration of lye is 50% by weight. The neutralization temperature is 50°C.

[0041] Then the two are mixed and neutralized to PH=8.

Embodiment 3

[0043] The bleached α-sulfo fatty acid ester is dissolved in methanol, and the weight of methanol in the α-sulfo fatty acid ester solution is 200% of the weight of the α-sulfo fatty acid ester, which is a weight ratio.

[0044] Sodium hydroxide is soluble in alcohol, and the concentration of lye is 5%, by weight. The neutralization temperature is 60°C.

[0045] Then the two are mixed and neutralized to PH=6.

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Abstract

A method for neutralizing α-sulfo fatty acid esters, the process steps include dissolving bleached α-sulfo fatty acid esters in alcohol, and then using liquid alkali to neutralize to pH=6-8 in steps. The alcohol used is methanol, the weight of methanol in the α-sulfo fatty acid ester solution is 50% to 200% of the weight of the α-sulfo fatty acid ester, and the neutralization base is alcohol alkali, sodium hydroxide, potassium hydroxide or Sodium carbonate, lye concentration is 5% to 50%. The neutralization temperature is 40-80°C. The invention also provides a device for realizing the neutralization method of α-sulfo fatty acid ester. The method and device of the invention have the characteristics of reasonable design, easy manufacture, fast cooling, low reaction temperature, uniform mixing of materials, good neutralization effect and high product quality.

Description

1. Technical field [0001] The invention belongs to the field of surfactants and relates to a method for neutralizing alpha-sulfo fatty acid esters. For the neutralization of α-sulfo fatty acid esters. 2. Background technology [0002] α-Sulfofatty acid ester salt is an excellent surfactant with strong resistance to hard water and good biodegradability. It can be used in daily chemical and mineral processing industries. [0003] α-Sulfofatty acid ester salts are usually prepared by reacting fatty acid esters with sulfur trioxide to produce sulfonic acid, followed by bleaching and alkali neutralization. [0004] The α-sulfo fatty acid ester is neutralized with an alkali to prepare the corresponding salt. The neutralization reaction has a large heat release and a high viscosity of the material. If the neutralization reaction conditions are not well controlled, the color of the product will be deepened and the content of the diacid salt will increase. According to reports, neu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/32C07C309/20
Inventor 李宏才
Owner 威海金轮化工有限责任公司