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Preparation and use method of anionic gemini surfactant solution for efficient solubilization of chlorinated hydrocarbon pollutants

A surfactant and anionic technology, which is applied in the field of anionic Gemini surfactant solutions, can solve the problems of unresearched solubilization effect, long time-consuming synthesis of materials, high sealing requirements, etc., and achieve mild conditions and low reaction time. Short-lived, wide-ranging effects

Active Publication Date: 2022-07-12
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned patents, the synthesis of materials takes a long time and chlorosulfonic acid is used as the sulfonating agent in the sulfonation step. Chlorosulfonic acid is a dangerous product that may explode when exposed to moisture, and the sealing performance is relatively high during the synthesis operation. and there is a certain risk
At the same time, the currently reported sulfonate anionic Gemini surfactants mainly focus on improving the purity and studying the basic properties of the product surface tension. The solubilization effect has not been studied. Not used for remediation of hydrophobic chlorinated hydrocarbon contamination in subsurface aquifers

Method used

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  • Preparation and use method of anionic gemini surfactant solution for efficient solubilization of chlorinated hydrocarbon pollutants
  • Preparation and use method of anionic gemini surfactant solution for efficient solubilization of chlorinated hydrocarbon pollutants
  • Preparation and use method of anionic gemini surfactant solution for efficient solubilization of chlorinated hydrocarbon pollutants

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of intermediate product ethylene glycol bismaleate monoester

[0036] Take 5.148g (0.0525mol) of maleic anhydride and melt the solid at 70°C in a three-necked flask equipped with a condensation reflux device. After the maleic anhydride is completely melted, add 1.46mL (0.02625mol) of ethylene glycol successively to the flask, and 0.07g (1% wt) catalyst p-toluenesulfonic acid, 2ml solvent acetone, the reaction was incubated under magnetic stirring for 1h, connected to a circulating water vacuum pump, and the solvent acetone was extracted under reduced pressure to obtain the monoesterified product Intermediate A.

Embodiment 2

[0038] Preparation of ethylene glycol bismaleate n-decyl diester

[0039]Example 1 The reactor was loaded with a water separator, the intermediate A was kept in the reactor, 8.75mL (0.4565mol) n-decanol, 0.08g (1%wt) catalyst p-toluenesulfonic acid were added successively, and nitrogen was introduced simultaneously. Evacuate to make the reading of the vacuum pump reach 0.05Mpa, raise the reaction temperature to 120°C, and keep the reaction for 3h under magnetic stirring to obtain the intermediate B of the diesterization product.

Embodiment 3

[0041] Preparation of ethylene glycol bismaleate n-decyl alcohol diester sulfonate

[0042] Remove the water separator and the vacuum device on the device of Example 2, add 10 mL of deionized water to the there-necked flask equipped with intermediate product B under normal temperature magnetic stirring, and use extensive pH test paper during the dripping of the sodium hydroxide solution of 60 g / L. Measure the pH value of the mixture until the mixture reaches neutrality, add 5.2g (0.05mol) sodium bisulfite, raise the reaction temperature to 110°C, and keep the reaction under magnetic stirring for 8h to obtain a sulfonated product, which is moved to a beaker Dry at 105°C to obtain white solid GS-10.

[0043] The prepared anionic Gemini surfactant for efficient solubilization of chlorinated hydrocarbon pollutants has the following structural formula:

[0044]

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Abstract

The invention relates to a preparation and use method of an anionic Gemini surfactant solution for high-efficiency solubilization of chlorinated hydrocarbon pollutants, and a synthetic ethylene glycol bismaleate n-decanol diester sulfonate Gemini surfactant (GS-10) dissolves in water and forms negatively charged micelles at a concentration higher than the critical micelle concentration, and hydrophobic chlorinated hydrocarbons such as TCE and PCE enter the micelles to increase the apparent solubility of pollutants in water; The invention can be preferably used for groundwater surfactant in-situ flushing technology to repair residual chlorinated hydrocarbon pollutants in aquifers, and is widely used.

Description

technical field [0001] The invention belongs to the technical field of surfactants, in particular to an in-situ surfactant, and in particular to a preparation and use method of an anionic Gemini surfactant solution with high solubilizing ability for chlorinated hydrocarbon pollutants. The surfactant dissolved in water to form an aqueous solution can effectively improve the solubility of hydrophobic chlorinated hydrocarbon pollutants in water. Background technique [0002] Groundwater is the main source of drinking water in my country. With the development of industry and agriculture, the problem of organic pollution of groundwater is becoming more and more serious. Chlorinated hydrocarbons are widely used as degreasing agents, cleaning agents and intermediates in industrial synthesis, so the detection rate of chlorinated hydrocarbon pollutants in groundwater surveys around the world is extremely high. Most chlorinated hydrocarbons such as trichloroethylene (TCE) and tetrach...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07C309/17C07C303/32C07C67/08C07C69/60C09K23/10
CPCC07C309/17C07C303/32C07C67/08C09K23/00C07C69/60
Inventor 董军梁雪杨朝格徐非凡蔡培垚莫言阳姜迪瀚
Owner JILIN UNIV
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