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Pressurization density method production technique and device for controlling sulfonation rate in sulfonation production of anionic surfactant

A surfactant and production process technology, applied in the direction of feeding devices, sulfonate preparation, chemical instruments and methods, etc., can solve the problems of high control cost, control error, and many control variables, and achieve low cost and convenient operation , The effect of changing the structure is simple

Active Publication Date: 2015-03-18
JIAXING ZANYU TECH DEV CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the control of sulfonation rate in domestic sulfonation units mostly adopts laboratory sampling, analysis data and manual control of reaction parameters to adjust the feed ratio of materials. This technology has the following shortcomings: 1) Product quality control is too dependent on personal control Operating experience, and sampling and testing require a certain amount of time, so the molar ratio of materials cannot be adjusted accurately and in a timely manner; 2) There are certain fluctuations in the continuous sulfonation process of anionic surfactants, and the results of sampling and testing represent only instantaneous points, which cannot Represents a stable situation in continuous time periods, and manual adjustment is difficult to achieve stable control
Foreign control methods need to control liquid sulfur, dry air, SO 3 The flow of gas and organic materials is controlled at the same time to ensure the molar ratio of the final material is constant, the control variables are many and complex, and the control cost is high
It has been reported that in the production of alkylbenzenesulfonic acid, the cascade control system of sulfonic acid density and alkylbenzene flow rate is used to control the sulfonation rate. Surfactant sulfonation products are easy to entrain gas, which is easy to cause control errors

Method used

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  • Pressurization density method production technique and device for controlling sulfonation rate in sulfonation production of anionic surfactant

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] AEO 2 Enter the membrane tube sulfonator through the organic material pump, SO 3 The gas enters from the top of the membrane sulfonator. The separated tail gas goes to the tail gas absorption system; after the ester comes out of the gas-liquid separator, it is transported to the neutralization system by the ester pump, the outlet pressure of the ester pump is kept at 0.6MPa through the back pressure valve, and the outlet density of the ester pump is Control between 1.0220~1.0230g / ml. After the whole system is stabilized, the ester neutralization value is stable at 111.0~112.0mgNaOH / g.

[0032] Under this process, the AES product index that obtains is active matter 70.1%, sulfate 0.6%, unsulfurized matter 1.0%, color and luster 15Hazen (10% ethanol aqueous solution of 5% active matter; promptly comprise the active matter of 5% volume content in the product , 10% ethanol aqueous solution by volume; the same below).

Embodiment 2

[0034] α-olefin enters the membrane tube sulfonator through the organic material pump, and SO3 gas enters from the top of the membrane sulfonator. The separated tail gas goes to the tail gas absorption system; after the ester comes out of the gas-liquid separator, it is transported to the neutralization system by the ester pump, the outlet pressure of the ester pump is kept at 0.5MPa through the back pressure valve, and the outlet density of the ester pump is Control between 0.9770~0.9780g / ml. After the whole system is stabilized, the ester neutralization value is stable at 130.0~131.0mgNaOH / g.

[0035] Under this process, the product obtained has 35% active matter, 1.3% sulfate, 1.2% petroleum ether extract, and 35 Hazen color (10% ethanol aqueous solution of 5% active matter).

Embodiment 3

[0037] The methyl ester enters the membrane tube sulfonator through the organic material pump, and the SO 3 The gas enters from the top of the membrane sulfonator. The separated tail gas goes to the tail gas absorption system; after the ester comes out of the gas-liquid separator, it is transported to the neutralization system by the ester pump, the outlet pressure of the ester pump is kept at 0.6MPa through the back pressure valve, and the outlet density of the ester pump is Control between 1.0230~1.0240g / ml. After the whole system is stabilized, the ester neutralization value is stable at 175~176mgNaOH / g.

[0038] Under this process, the product obtained has 85.0% active matter, 1.0% sulfate, 1.2% petroleum ether extract, and a color of 20 Hazen (10% ethanol aqueous solution of 5% active matter).

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Abstract

The invention relates to a pressurization density method production technique and device for controlling the sulfonation rate in the sulfonation production of an anionic surfactant, and aims to on line, precisely and timely controlling the sulfonation rate in a continuous production process of the anionic surfactant. The device has the characteristic of simple structure. According to the technical scheme, the pressurization density method production technique comprises the following steps of: A, performing sulfonation reaction; B, performing gas and liquid separation on a sulfonated product; and C, measuring acid ester density, adjusting the material feeding speed, controlling a feeding ratio, and precisely controlling the sulfonation rate. The pressurization density method production device for controlling the sulfonation rate is characterized in that a back pressure valve is further arranged in a pipeline; residual acid ester enters a neutralization system after sequentially passing through an acid ester pump and the back pressure valve; a measurer is arranged in a material pipe between the acid ester pump and the back pressure valve; and a conversion controller is respectively communicated with the measurer and an organic material pump through data wires.

Description

technical field [0001] The invention relates to a method and device for automatically and stably controlling the sulfonation rate during the sulfonation reaction process, especially suitable for common anionic surfactants (such as fatty alcohol polyoxyethylene ether sulfate, α-olefin sulfonate, Sodium fatty acid methyl ester sulfonate, etc.) production process control. Background technique [0002] In the surfactant industry, anionic surfactants are the earliest developed, largest and most widely used products in the surfactant industry. [0003] At present, SO is mainly used at home and abroad. 3 As a sulfonating agent, the sulfonation or sulfation of liquid organic materials is used to produce anionic surfactants. The stable control of the sulfonation rate of the sulfonation device has always been the research focus of the continuous production of anionic surfactants. At present, it is mainly through the control of the material. The molar ratio is achieved. [0004] At ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J4/00B01J4/02C07C309/62C07C303/32C08G65/326
Inventor 冯耀平汪家众葛赞史立文
Owner JIAXING ZANYU TECH DEV CO LTD
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