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Method for producing sodium fatty acid methyl ester sulfonate

A kind of sodium fatty acid methyl ester sulfonate and a production method technology, applied in the direction of sulfonate preparation, organic chemistry, etc., can solve the problems that large-scale, continuous and stable industrial production cannot be realized, and achieve easy industrial operation, less foam, and elimination The Effects of Methanol on Safety Concerns

Active Publication Date: 2012-12-26
南风化工(运城)集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a method for producing sodium fatty acid methyl ester sulfonate in order to solve the problem that the existing MES production technology route has the above-mentioned defects and cannot realize large-scale, continuous and stable industrial production

Method used

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  • Method for producing sodium fatty acid methyl ester sulfonate

Examples

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Embodiment 1

[0025] A kind of production method of sodium fatty acid methyl ester sulfonate, comprises the following steps: (1) sulfonation: adopt the hydrogenated palm-methyl stearate that the product code name provided by Malaysia Corning Company to be ME.C16-60MY as raw material, its The specific specifications and carbon chain distribution are as follows:

[0026] Iodine value %I 2 0.15

[0027] Acid value mgKOH / g 0.2

[0028] Free glycerin% 0.005

[0029] Moisture % 0.05

[0030] Saponification value mgKOH / g 199

[0031] Average molecular weight 281

[0032] Carbon chain distribution:

[0033] C14 and below 1.0

[0034] C16 61.7

[0035] C18 37.0

[0036] C18 and above 0.3

[0037] The above raw materials are subjected to SO in a multi-tubular membrane reactor 3 Sulfonation reaction, methyl stearate and SO 3 The molar ratio of SO is 1:1.08, SO 3 The gas concentration of / air is at 5%, and the feeding temperature of methyl stearate is at 60 DEG C; (2) Aging: aging...

Embodiment 2

[0044] A kind of production method of sodium fatty acid methyl ester sulfonate, comprises the following steps: (1) sulfonation: adopt the hydrogenated palm-stearic acid methyl ester that the product code name provided by Malaysia Corning Company is ME.C16-95MY as raw material, raw material main indicators:

[0045] Iodine value %I 2 0.12

[0046] Acid value mgKOH / g 0.1

[0047] Free glycerin% 0.015

[0048] Moisture % 0.05

[0049] Saponification value mgKOH / g 190

[0050] Average molecular weight 272

[0051] The above raw materials are subjected to SO in a multi-tubular membrane reactor 3 Sulfonation reaction, methyl stearate and SO 3 The molar ratio is 1:1.20, SO 3 The gas concentration of / air is at 6%, and the feeding temperature of methyl stearate is at 65 ℃; (2) Aging: aging reaction is carried out continuously in the stirring reaction kettle connected with each other, and adds accounting for fatty acid methyl ester sulfonic acid 3 % catalyst, ...

Embodiment 3

[0058] A kind of production method of sodium fatty acid methyl ester sulfonate, comprises the following steps: (1) sulfonation: adopt the hydrogenated palm-stearic acid methyl ester that the product code name provided by Malaysia Corning Company is ME.C16-60MY as raw material, raw material main indicators:

[0059] Iodine value %I 2 0.1

[0060] Acid value mgKOH / g 0.1

[0061] Free glycerin% 0.01

[0062] Moisture % 0.02

[0063] The above raw materials are subjected to SO in a multi-tubular membrane reactor 3 Sulfonation reaction, methyl stearate and SO 3 The molar ratio is 1:1.15, SO 3 The gas concentration of / air is at 5%, and the feeding temperature of methyl stearate is at 62 DEG C; (2) aging: aging reaction is carried out continuously in the stirred reaction still connected in series, and adds and accounts for fatty acid methyl ester sulfonic acid 2 % catalyst, the catalyst is any one of ammonium sulfate, sodium sulfate or potassium sulfate, the aging temp...

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Abstract

The invention relates to a surfactant used in the production of washing powder, in particular to a method for producing sodium fatty acid methyl ester sulfonate, which solves the problem that the prior art cannot realize continuous, stable industrialized mass production. Hydrogenated palm-methyl stearate is adopted as material, and is sulfonated by SO3 gas on a multi-tube film reactor, steps, such as aging, reesterification, dealcoholization, neutralization, bleaching and vacuum drying, are then sequentially carried out, so that sodium fatty acid methyl ester sulfonate product is obtained, the content of MES is more than 80 percent, the content of disodium salt is less than 5 percent, the content of free oil is less than 2.5 percent, the content of sodium methyl sulfate is less than 8 percent, and color is less than 60 klett(5 percent A.M). Because highly selective catalyst is added in the aging process, the production of deep-colored by-product is reduced; because the reesterification reaction and the bleaching reaction are separately carried out, the safety of reaction is enhanced, and the consumption of methanol as solvent is greatly reduced; because vacuum dealcoholization is carried out before sulfoacid neutralization, industrialized operation can be easily carried out, and meanwhile, the safety problem of methanol in the subsequent bleaching step is eliminated.

Description

technical field [0001] The invention relates to a surfactant used in the production of washing powder, in particular to a production method of sodium fatty acid methyl ester sulfonate. Background technique [0002] Sodium fatty acid methyl ester sulfonate (MES for short) is a green surfactant produced from renewable natural oils (palm stearin, etc.) through a series of reactions such as transesterification, sulfonation, and neutralization. Because of its excellent surface activity, outstanding resistance to hard water washing, mild to the skin, and good biodegradability, and the raw material resources are abundant and renewable, the development and application prospects are very broad. Although MES has obvious advantages in performance, it is a potential substitute for sodium sulfonate (LAS). It is green, renewable, environmentally friendly, milder to the human body, and inexpensive, but compared with LAS, some obvious disadvantages are also It affects its application, for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/62C07C303/32
Inventor 廉根旺王泽云唐东亮许雪娟马红恩陈海兰张博丽高战备
Owner 南风化工(运城)集团有限公司