A kind of production technology of high-quality sodium fatty acid methyl ester sulfonate

Active Publication Date: 2022-02-15
ZANYU TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the sulfonation of fatty acid methyl esters, in order to improve the sulfonation effect of methyl esters, excess SO will be added. 3 , this part of the excess SO 3 About 6-10% of sulfonic acid anhydride intermediates will be formed. During the later production process of sulfonic acid anhydride intermediates, some by-products, sodium methyl sulfate and disodium salt, will be formed. The mass of by-products accounts for 5-7% of the total mass of MES. %, these residual by-products affect the purity of MES

Method used

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  • A kind of production technology of high-quality sodium fatty acid methyl ester sulfonate
  • A kind of production technology of high-quality sodium fatty acid methyl ester sulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Production process of 1t / h sodium fatty acid methyl ester sulfonate

[0027] Fatty acid methyl ester and 7% concentrated SO 3 Enter the membrane reactor at a flow rate of 780kg / h and 275kg / h respectively for sulfonation reaction, control the sulfonation temperature at about 83°C; Add dodecanoic acid for mixing; the mixed sulfonated compound and fatty acid methyl ester flow at 1020kg / h and 153kg / h, respectively, enter the microwave reactor for aging treatment. The microwave temperature is controlled at 88°C, and the microwave aging stays for 16 minutes to obtain the MES intermediate body; methanol at 0.38m 3 The flow rate per hour enters the re-esterification system together with the MES intermediate for re-esterification, bleaching, and neutralization to obtain the MES finished product. The quality indicators of the MES finished product are shown in Table 1:

[0028] Table 1

[0029]

Embodiment 2

[0031] 2.0t / h production process of sodium fatty acid methyl ester sulfonate

[0032] Fatty acid methyl ester and 7% concentrated SO 3 Enter the membrane reactor at a flow rate of 1500kg / h and 560kg / h to undergo a sulfonation reaction, and the sulfonation temperature is maintained at 85°C; after the sulfonation reaction, the sulfonated product separated from the gas-liquid separator is added at a flow rate of 23kg / h Myristic acid is mixed; the mixed sulfonated compound enters the high-speed shear reactor at a flow rate of 2025kg / h and the fatty acid methyl ester at a flow rate of 298kg / h. The temperature is controlled at 85°C, and the high-speed shear reactor stays 24min to obtain the MES intermediate; methanol in 0.75m 3 The flow rate per hour enters the re-esterification system together with the MES intermediate for re-esterification, bleaching, and neutralization to obtain the MES finished product. The quality indicators of the MES finished product are shown in Table 2:

...

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Abstract

The invention relates to a production process of a surfactant. The purpose is to provide a fatty acid methyl ester sulfonate production process to ensure product quality and improve product conversion rate. The technical solution is: a high-quality production process of sodium fatty acid methyl ester sulfonate, which is realized through the following steps in turn: 1) sulfonation: fatty acid methyl ester and 5-7% gas-concentrated SO3 enter a membrane reactor to undergo a sulfonation reaction , the molar ratio of fatty acid methyl ester to SO3 is 1: 1.25~1.35; 2) aging: the material output from the sulfonator enters the gas-liquid separator for separation, and the sulfonate is separated from the bottom of the separator and then enters the reactor for aging treatment to obtain MES intermediate; 3) Re-esterification, bleaching, and neutralization: put the aged MES intermediate and an appropriate amount of methanol into the re-esterification system to obtain MES slurry; Neutralize with the system, and enter the temporary storage tank after cooling to obtain the finished MES.

Description

technical field [0001] The invention relates to a production process of a surfactant, in particular to a production process of sodium fatty acid methyl ester sulfonate. Background technique [0002] Fatty acid methyl ester sodium sulfonate (hereinafter referred to as MES) is an anionic surfactant with excellent performance. It has excellent calcium soap dispersing ability and good biodegradability of natural raw materials as renewable resources. It has long been concerned by people. MES is mild, non-toxic, non-irritating to the human body, and has no phosphorus. These properties are superior to sodium alkylbenzene sulfonate (LAS), and it is internationally recognized as the third representative surfactant to replace LAS. With the continuous consumption of petroleum resources and the increasing awareness of environmental protection, MES, as a renewable resource production and environmentally friendly surfactant, conforms to the overall development trend of resources and the e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/62C07C303/32
CPCC07C303/32C07C309/62
Inventor 方银军雷小英钟凯洪玉倩史立文葛赞
Owner ZANYU TECH GRP CO LTD
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