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Method for preparing saturated palmitic acid methyl ester and fatty acid methyl ester sulfonate from palm tristearin

A technology of fatty acid methyl ester sulfonate and methyl palmitate, which is applied in the field of surfactant preparation, can solve the problems of harsh pH value, increased process difficulty, and corrosion of equipment, so as to increase the content of active substances and improve the color of the product , to reduce the effect of hydrolysis

Inactive Publication Date: 2012-06-27
HENAN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although various countries have studied MES for many years and accumulated a lot of production experience, there are always some difficult problems in the production process, such as difficult control of sulfonation technology, harsh pH value, and selection of bleaching agent. and the formation of by-product disodium salt and the dark color of the product
Disodium salt has poor solubility and low surface activity, which is not conducive to the application of products in washing products
Ye Jian and others used fuming sulfuric acid for sulfonation reaction. Although the content of active substances in the sulfonation product is high, the sulfonation process produces a large amount of waste acid, which increases the difficulty of the process and corrodes the equipment.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Mix palm stearin and anhydrous methanol evenly according to the ratio of substance to substance 1:7, stir and heat to 65°C, quickly add catalyst sodium methoxide, heat up to 78-80°C, reflux reaction for 4~6 hours, cool down after the reaction , put the reaction mixture in a separatory funnel for static layering to remove the glycerol layer, wash the methyl ester layer with warm saturated brine to remove unreacted methanol and catalyst, add anhydrous sodium sulfate to dry and remove water, and centrifuge to obtain refined methyl ester;

[0020] (2) Put the refined methyl ester and nickel catalyst into the hydrogenation reaction axe, the amount of catalyst used is 1% of the weight of the methyl ester, and hydrogen is introduced after venting. Raise the temperature to 200°C, adjust the rotation speed to 500r / min, and maintain the pressure at 1.1MPa. After hydrogenation for 5 hours, cool down and discharge the material, and filter out the catalyst to obtain saturated met...

Embodiment 2

[0023] (1) Mix palm stearin and anhydrous methanol evenly according to the ratio of substance to substance 1:7, stir and heat to 65°C, quickly add catalyst sodium methoxide, heat up to 78-80°C, reflux reaction for 4~6 hours, cool down after the reaction , put the reaction mixture in a separatory funnel for static layering to remove the glycerol layer, wash the methyl ester layer with warm saturated brine to remove unreacted methanol and catalyst, add anhydrous sodium sulfate to dry and remove water, and centrifuge to obtain refined methyl ester;

[0024] (2) Put the refined methyl ester and nickel catalyst into the hydrogenation reaction axe, the amount of catalyst used is 1% of the weight of the methyl ester, and hydrogen is introduced after venting. Raise the temperature to 200°C, adjust the rotation speed to 500r / min, and maintain the pressure at 1.1MPa. After hydrogenation for 5 hours, cool down and discharge the material, and filter out the catalyst to obtain saturated met...

Embodiment 3

[0027] (1) Palm stearin and anhydrous methanol are uniformly mixed according to the ratio of substances of 1:6, stirred and heated to 65 ° C, quickly added catalyst sodium methylate, heated to 78-80 ° C, reflux reaction for 4 to 6 hours, cooled after the reaction , put the reaction mixture in a separatory funnel for static layering to remove the glycerol layer, wash the methyl ester layer with warm saturated brine to remove unreacted methanol and catalyst, add anhydrous sodium sulfate to dry and remove water, and centrifuge to obtain refined methyl ester;

[0028](2) Put the refined methyl ester and nickel catalyst into the hydrogenation reaction axe, the amount of catalyst used is 1% of the weight of the methyl ester, and hydrogen is introduced after venting. Raise the temperature to 200°C, adjust the rotation speed to 400r / min, and maintain the pressure at 1.1MPa. After hydrogenation for 5 hours, cool down and discharge the material, and filter out the catalyst to obtain satu...

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PUM

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Abstract

The invention discloses a method for preparing saturated palmitic acid methyl ester and an aliphatic acid methyl ester sulfonate from palm tristearin. Saturated palmitic acid methyl ester is prepared, the saturated palmitic acid methyl ester which is used as a raw material and chlorosulfonic acid are sulfonated in a solvent, the solvent is recovered through condensation in the sulfonation process, and the obtained tail gas which is washed by water is discharged; and the obtained solfonated product is bleached by hydrogen peroxide, neutralized and dried to obtain a sodium salt of the fatty acid methyl ester sulfonate. According to the invention, palmitic acid methyl ester is subjected to sulfonation hydrogenation through a solvent process; and compared with traditional methods, the method has the advantages of reduction of deep sulfonation of the fatty acid methyl ester, avoiding of the generation of a large amount of sulfone byproducts in the sulfonation process, less double bonds, and good product color. A resterification technology is added in the bleaching process, and sodium hydroxide is used to neutralize a methanol phase, so the hydrolysis of the fatty acid methyl ester sulfonate is reduced, and the active matter content is improved.

Description

technical field [0001] The invention belongs to the technical field of surfactant preparation, and relates to a method for preparing fatty acid methyl ester sulfonate through methyl esterification, hydrogenation of saturated methyl ester and sulfonation using natural oil as raw material, in particular to a hydrogenated methyl palmitate and The sulfonation reaction of chlorosulfonic acid in a solvent is followed by bleaching and neutralization with sodium hydroxide alcohol solution to obtain fatty acid methyl ester sulfonate. Background technique [0002] Fatty acid methyl ester sulfonate, referred to as MES, also known as α-sulfo fatty acid methyl ester sodium salt, is a new type of anionic surfactant with superior performance. MES uses natural oil as raw material, has good washing properties, calcium soap dispersibility and high biodegradability, low toxicity, weak irritation, excellent emulsifying and foaming properties, and can be applied to plastics, leather, coatings, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C69/24C07C67/303C07C67/03C11C3/10C11C3/12C07C309/17C07C303/32C07C303/08
Inventor 马传国刘会娟汪鸿
Owner HENAN UNIVERSITY OF TECHNOLOGY