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Preparation method of fatty alcohol polyethenoxy ether sulfonate

A technology of alcohol polyoxyethylene ether sulfonate and alcohol polyoxyethylene ether, which is applied in the field of preparation of surfactants, can solve problems such as unused, difficult, and yield reduction, and achieve increased yield, increased concentration, and system Viscosity reduction effect

Inactive Publication Date: 2013-09-11
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] There are the following problems in the above synthesis method: (1) when using thionyl chloride chlorinated fatty alcohol polyoxyethylene ether, no
[0011] posed certain difficulties, resulting in lower yields

Method used

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  • Preparation method of fatty alcohol polyethenoxy ether sulfonate
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  • Preparation method of fatty alcohol polyethenoxy ether sulfonate

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preparation example Construction

[0033] The steps of the preparation method of fatty alcohol polyoxyethylene ether sulfonate of the present invention are as follows:

[0034] The first step: put fatty alcohol and alkali catalyst into the autoclave, and intermittently feed ethylene oxide into the reaction system to prepare fatty alcohol polyoxyethylene ether;

[0035] The second step: dissolve the fatty alcohol polyoxyethylene ether with an organic solvent, add thionyl chloride under the condition of stirring and nitrogen protection, and prepare the chlorinated fatty alcohol polyoxyethylene ether;

[0036] Step 3: Put an aqueous solution of potassium sulfite, a diluent, and chlorinated fatty alcohol polyoxyethylene ether into the autoclave, and stir rapidly under high pressure to prepare fatty alcohol polyoxyethylene ether sulfonate.

[0037] Wherein, the fatty alcohol described in the first step is dodecyl alcohol, myristyl alcohol or cetyl alcohol; the base catalyst is sodium hydroxide or potassium hydro...

Embodiment 1

[0043] Step 1: Add 90.00g (0.484mol) of dodecanol and 0.27g of sodium hydroxide into the autoclave, intermittently feed 63.87g (1.451mol) of ethylene oxide, control the reaction temperature to 125°C, and the pressure React for 3 hours at 0.3Mpa, and after the reaction is completed and cooled, polyoxyethylene lauryl ether can be obtained.

[0044] Step 2: Add 38.13g (0.100mol) dodecyl alcohol polyoxyethylene ether and 7mL pyridine into the four-neck flask, add thionyl chloride drop by drop under nitrogen protection and stirring conditions, and the molar ratio of the feed is dodecyl alcohol Polyoxyethylene ether: thionyl chloride = 1:1.4. After the dropwise addition, the temperature was raised to 80°C for 10 hours. After the reaction, it was subjected to rotary evaporation, washing with distilled water, liquid separation, and vacuum drying to obtain a light yellow oily liquid dodecachloride alcohol polyoxyethylene ether.

[0045] Step 3: Add 39.98g (0.100mol) chlorinated fatty ...

Embodiment 2

[0047] The reaction steps are exactly the same as in Example 1, except that for the first step, tetradecyl alcohol is used as a reactant, potassium hydroxide is used as an alkali catalyst, and the quality of potassium hydroxide is 2% of the quality of tetradecyl alcohol, and the reaction temperature is 130° C. , the reaction pressure was 0.2Mpa, and the reaction was carried out for 2.5h, finally obtaining amber liquid potassium tetradecyl alcohol polyoxyethylene ether sulfonate.

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Abstract

The invention particularly relates to a preparation method of a fatty alcohol polyethenoxy ether sulfonate surfactant, which comprises the following steps: preparing fatty alcohol polyethenoxy ether from raw materials fatty alcohol and epoxyethane under high pressure; chlorinating the fatty alcohol polyethenoxy ether by a solvent process; and finally, by using potassium sulfite as a sulfonating agent, preparing the end product fatty alcohol polyethenoxy ether sulfonate under high pressure in the presence of a diluter. Compared with the prior art, the invention has the following advantages: in the chlorination process by the solvent process, the solvent has the catalytic action on the reaction to increase the reaction rate, and can be used as an acid-binding agent to absorb tail gas; the potassium sulfite with high solubility in water is used as the sulfonating agent to increase the reaction rate and reduce the water quantity, thereby preventing the system from gelling; and the diluter is introduced to lower the viscosity of the system in the reaction process, thereby preventing the side reaction and being beneficial to azeotropic dehydration in the after-treatment process.

Description

technical field [0001] The invention relates to a preparation method of a surfactant, in particular to a preparation method of fatty alcohol polyoxyethylene ether sulfonate. Background technique [0002] As an important energy resource, oil not only widely affects our daily life, but also has a profound impact on a country's economic development and national defense. The use of tertiary oil recovery technology can increase the oil recovery rate to more than 50%. Tertiary oil recovery technologies are mainly divided into four categories: thermal flooding, miscible flooding, chemical flooding, and application of biotechnology to enhance oil recovery. Currently, chemical flooding is widely used, and surfactants are the key components. Petroleum sulfonate is currently the most widely used anionic surfactant in enhanced oil recovery, but this kind of surfactant also has some problems, such as easy to form precipitation with divalent and other high-valent cations, that is, the sa...

Claims

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Application Information

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IPC IPC(8): C07C309/10C07C303/32
Inventor 叶志文程云赵晓辉
Owner NANJING UNIV OF SCI & TECH
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