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Process for hydrolyzing alpha-olefin sulfonate and system for hydrolyzing alpha-olefin sulfonate

An alkenyl sulfonate and process technology, which is applied in the preparation of sulfonate, sulfonic acid, chemical industry, etc., can solve the problems of affecting product quality and heat exchange effect, low energy utilization rate, and product color deepening, etc., to achieve The effect of saving process water consumption, low cost and improving heat transfer efficiency

Active Publication Date: 2014-01-08
JIAXING ZANYU TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the hydrolysis process, the hydrolysis temperature and time have a great influence on the residual sultone. The higher the hydrolysis temperature and the longer the hydrolysis time, the less the residual sultone (the hydrolysis of δ-sultone is difficult to carry out); However, if the hydrolysis temperature is too high, the color of the product will deepen and corrode the equipment
Therefore, the residual amount of sultone in the product is closely related to the hydrolysis process and equipment. However, due to the limitation of detection methods, there is no report on the improvement of the AOS hydrolysis process in China.
The existing AOS hydrolysis system is composed of heat exchanger, heater, cooler and hydrolyzer. It adopts tube or plate heat exchanger for heating, which not only consumes a lot of energy, but also has low energy utilization rate, and the material near the heat exchanger is volatile. Skinning due to water will affect product quality and heat transfer effect

Method used

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  • Process for hydrolyzing alpha-olefin sulfonate and system for hydrolyzing alpha-olefin sulfonate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] After sulfonation, aging, and neutralization of α-alkenyl in the 3.8t / h sulfonator, the flow rate is 6750kg / h, the temperature of the neutralization material is 75°C, the pressure of the neutralization discharge is 0.32MPa, and the product is free The alkali content is 2.3%, and the sultone is 51%. The material is pressurized to 0.42 MPa through the booster pump 8, and flows countercurrently with the hydrolyzed alkenyl sulfonate material from the hydrolyzer to exchange heat. ) is directly contacted with steam and heated to 150°C, then enters the hydrolyzer through the static mixer 5, the residence time is 30min, then cools to the outlet at 55°C through the cooler 7, and enters the finished product tank by adding a decolorizing agent to obtain a finished AOS with an active substance content of 35.0 %, free alkali 0.2%, color 50 Hazen, sultone <0.2mg / kg.

Embodiment 2

[0042] After sulfonation, aging, and neutralization of α-alkenyl in a 1.6t / h sulfonator, the flow rate is 2840kg / h, the temperature of the neutralization material is 80°C, and the pressure of the neutralization discharge is 0.35MPa. The alkali content is 2.2%, and the sultone is 49%. The material is pressurized to 0.47 MPa through the booster pump 8, and flows countercurrently with the hydrolyzed alkenyl sulfonate material from the hydrolyzer 6 to exchange heat, and the temperature of the material is raised to 115 ° C; ) in direct contact with steam and heated to 155°C, then enters the hydrolyzer 6 for a residence time of 20 minutes; then passes through the cooler 7 to cool to 55°C for output, adds a decolorizer and enters the finished product tank to obtain a finished AOS with an active substance content of 35.2%, free alkali 0.2%, color 55 Hazen, sultone <0.2mg / kg.

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Abstract

The invention relates to a process for hydrolyzing alpha-olefin sulfonate (AOS) and a corresponding hydrolysis system. The invention aims to provide a process which has the characteristic of high product quality and a system which has the characteristic of simple structure. The technical scheme is that the process for hydrolyzing the alpha-olefin sulfonate comprises the following steps of: 1) conveying the alpha-olefin sulfonate which comes from a neutralizing system to a waste heat recovery heat exchanger and absorbing heat, and inputting into a hydrolyzer and hydrolyzing after temperature rise; and 2) releasing the heat of the alpha-olefin sulfonate which is output from the hydrolyzer through another pipeline of the waste heat recovery heat exchanger, reducing the temperature to 53 to 58 DEG C by using a cooler, and outputting finished AOS through an outlet. The system for hydrolyzing the alpha-olefin sulfonate is characterized in that: an input pipeline is communicated with a heat absorption pipe of the heat recovery heat exchanger, is sequentially communicated with a steam heater and the hydrolyzer, returns to a heat discharge pipe of the heat recovery heat exchanger, passes through the cooler and is communicated with the outlet till an output pipeline.

Description

technical field [0001] The invention relates to an alpha-alkenyl sulfonate hydrolysis process and a corresponding hydrolysis system, belonging to the technical field of chemical production. Background technique [0002] α-olefin sulfonate (abbreviated as AOS) is based on α-olefin as raw material, through SO 3 An anionic surfactant produced by sulfonation, neutralization, hydrolysis and other processes. Due to its good foaming, emulsifying, decontamination and calcium soap dispersing power, it is very soluble in water, compatible with various additives and enzyme preparations, easy to biodegrade, non-toxic, and less irritating to the skin, so it can be used Widely used in detergents and cosmetics. In recent years, with the improvement of environmental requirements, especially the quality and price of α-olefin raw materials have become more and more competitive, the industrial preparation of alkenyl sulfonate by α-olefin sulfonation has practical significance and development...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C303/32C07C303/02C07C303/44
CPCY02P20/10
Inventor 邹欢金王侃方银军华文高张义勇
Owner JIAXING ZANYU TECH DEV CO LTD
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