Method for producing 2-ethylhexyl alcohol sulfate salt

A technology of ethylhexyl alcohol and sulfate salt, which is applied in the field of producing 2-ethylhexyl alcohol sulfate salt, can solve the problems of reducing product yield, increasing equipment investment, and large power consumption, so as to simplify the production process and raw materials Take advantage of high and low intensity effects

Inactive Publication Date: 2016-05-04
GUANGZHOU LONKEY INDAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the reaction process, often due to the organic material in a large flow of SO 3 / Air mixed gas takes part of it into the exhaust gas. After the implementation of industrialization, an electrostatic demister is required to remove organic acid mist, resulting in loss of raw materials, lower product yield, and increased equipment investment.
Moreover, in the current gas-phase falling film sulfonation production process, the required gas-phase air needs to be dried before it can be used for SO 3 The dilution and mixing of gases requires a large amount of power consumption in order to obtain the required amount of dry air

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Industrial grade 2-ethylhexyl alcohol is used. In order to reduce the coloring reaction between by-products and sulfonating agents, the iodine value is required to be ≤0.5, the moisture content to be ≤0.1%, and the carbonyl value to be ≤0.3.

[0020] The sulfonating agent 98% concentrated sulfuric acid and the organic material 2-ethylhexyl alcohol are injected into the rectangular cross-toed glass structure microreactor from different inlets through a high-pressure pump at a flow rate of 1.3g / min and 1.3g / min respectively. The molar ratio between 2-ethylhexyl alcohol and sulfonating agent is 1:1.3. The reaction temperature in the rectangular cross-toed glass structure microreactor is controlled at 30°C, the channel width is 0.05mm, the depth is 0.15mm, the length is 20mm, and the residence time is about 1.8ms to obtain 2-ethylhexyl alcohol sulfate. 2-Ethylhexyl alcohol sulfate and neutralizing agent 10% liquid sodium hydroxide aqueous solution respectively enter the mic...

Embodiment 2

[0022] Industrial grade 2-ethylhexyl alcohol is used. In order to reduce the coloring reaction between by-products and sulfonating agents, the iodine value is required to be ≤0.5, the moisture content to be ≤0.1%, and the carbonyl value to be ≤0.3.

[0023] The sulfonating agent 99% chlorosulfonic acid and the organic material 2-ethylhexyl alcohol are injected into the rectangular cross-toed glass structure microreactor through the high-pressure pump at the flow rate of 1.5g / min and 1.3g / min respectively from different inlets , The molar ratio between 2-ethylhexyl alcohol and sulfonating agent is 1:1.1. The reaction temperature in the rectangular cross-toed glass structure microreactor is controlled at 30°C, the channel width is 0.05mm, the depth is 0.15mm, the length is 20mm, and the residence time is about 1.7ms to obtain 2-ethylhexyl alcohol sulfate. 2-Ethylhexyl alcohol sulfate and neutralizing agent 10% liquid sodium hydroxide aqueous solution enter the micro-mixer of the...

Embodiment 3

[0025] Industrial grade 2-ethylhexyl alcohol is used. In order to reduce the coloring reaction between by-products and sulfonating agents, the iodine value is required to be ≤0.5, the moisture content to be ≤0.1%, and the carbonyl value to be ≤0.3.

[0026] The sulfonating agent liquid sulfur trioxide and the organic material 2-ethylhexyl alcohol containing 10% mass fraction of liquid paraffin are respectively injected into the rectangular cross at a flow rate of 0.8g / min and 1.4g / min from different inlets through a high-pressure pump. In the toe-shaped glass structure microreactor, the molar ratio between 2-ethylhexyl alcohol and sulfonating agent is 1:1. The reaction temperature in the rectangular cross-toed glass structure microreactor is controlled at 30°C, the channel width is 0.05mm, the depth is 0.15mm, the length is 20mm, and the residence time is about 1.8ms to obtain 2-ethylhexyl alcohol sulfate. 2-Ethylhexyl alcohol sulfate and the neutralizing agent are 10% liquid ...

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Abstract

The present invention discloses a method for producing 2-ethylhexyl alcohol sulfate salt. The method is as below: injecting different inlet 2-ethylhexyl alcohol and a liquid sulfonating agent into a micro-reactor from different inlets of the micro-reactor, mixing and conducting a sulfonation reaction; controlling the reaction temperature at 5-50 DEG C, staying the reaction products in the micro-reactor for 0.5 milliseconds to 5 seconds, and then sending the reaction products into a micro-mixer connected with the micro-reactor to neutralize with a neutralizing agent, and aging for 0-30 min after neutralization, so as to obtain a transparent light yellow 2-ethylhexyl alcohol sulfate salt liquid. The method uses liquid-liquid phase reaction for synthesis of 2-ethylhexyl alcohol sulfate salt, not only obtains a high yield of 100%, but also does not produce any waste gas and waste requiring subsequent treatment. The method simplifies the production process, and improves the production effectiveness.

Description

technical field [0001] The present invention relates to a kind of method of producing 2-ethylhexyl alcohol sulfate ester salt. Background technique [0002] Sodium 2-Ethylhexyl Alcohol Sulfate, also known as Sodium Isooctyl Sulfate, Sodium Etasulfate, is an anionic surfactant widely used in strong alkaline solutions with excellent solubility, stability and permeability. Used in the manufacture of anti-concentrated alkali refining agent and mercerizing penetrating agent before printing and dyeing, and low-foaming wetting agent in electroplating nickel. [0003] At present, the commercially available 2-ethylhexyl alcohol sodium sulfate is generally synthesized in a traditional tank reactor. In order to reduce the intensity of the reaction, avoid coking in the reactor and improve the product yield, solid sulfamic acid is usually used for the reaction. The synthesis process is: add sulfamic acid in batches to the organic material 2-ethylhexyl alcohol in the kettle, keep a certa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C303/24C07C305/06
CPCC07C303/24C07C305/06
Inventor 潘鹤潮陈武渊蔡熙扬王志刚戴殷
Owner GUANGZHOU LONKEY INDAL
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