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Preparation of anionic surfactant

A surfactant and anion technology, which is applied in the field of preparation of anionic surfactants, can solve problems such as complicated operation, high reaction temperature unsuitable for industrial production, and serious corrosion of equipment, and achieve simple synthesis operation, wettability and development Good foaming properties, strong temperature and salt resistance

Pending Publication Date: 2022-04-12
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oleum sulfonation method is more corrosive to the equipment and the operation is more complicated, which has been criticized by researchers
The sulfamic acid sulfonation method hardly produces "three wastes" during the reaction process, but the high reaction temperature is not suitable for industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Example 1: Preparation of α,β-unsaturated octanoic acid. Add 9.3ml of anhydrous pyridine into a 100ml flat-bottomed flask, and after cooling to 0°C, add 5.7g of malonic acid at one time, add 6.4g of octanal dropwise under shaking conditions, install a drying tube on the bottle mouth, and place it at room temperature for 3 Day, shake at least 8 times a day, after the reaction is completed, the temperature is raised to 80°C for 8 hours. Wash with an equal volume of secondary water to obtain a mixed product, add 25% hydrochloric acid and diethyl ether, wash with water three times, dry over anhydrous magnesium sulfate, and finally distill under reduced pressure to obtain the target product.

Embodiment 2

[0016] Example 2: Preparation of final product. In a dry 100ml reaction bottle, add 1.1g of α, β-unsaturated octanoic acid and 5ml of ethanol, stir with a magnetic force, heat the oil bath to 60°C, dissolve 1.3g of sodium bisulfite in 2g of water, and add it to the reaction vessel , Refluxed for 4 hours, the reaction was completed, neutralized by adding sodium hydroxide solution, the solvent was distilled off under reduced pressure, then washed three times with petroleum ether, and dried to obtain the final product.

Embodiment 3

[0017] Example 3: Exploring the universality of anionic surfactants: 3%wt sodium chloride was added to 0.3%wt multipolar surfactant aqueous solution, and stirred evenly. The Daqing crude oil and the surfactant solution were injected into the quartz tube in turn. At 80°C, the Daqing crude oil gradually formed a thin line, and the interfacial tension was measured. Gudao crude oil and Shengtuo crude oil were tested by this method, and the test results showed that both could reach ultra-low interfacial tension (10 -3 mN / m).

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PUM

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Abstract

The invention relates to a preparation method of an anionic surfactant. Fatty aldehydes (caprylic aldehyde, n-capraldehyde and lauric aldehyde), malonic acid and sodium hydrogen sulfite are used as raw materials, and the surfactant is synthesized through a Doebner method and an addition reaction. The anionic surfactant is characterized in that the anionic surfactant simultaneously contains carboxyl and sulfonic acid groups, and has good temperature resistance, salt resistance, biological activity and acid and alkali resistance.

Description

technical field [0001] The invention provides a preparation method of an anionic surfactant, specifically synthesizing a multipolar anionic surfactant under mild reaction conditions. Background technique [0002] As a country's strategic resource, petroleum has an important impact on economic development and industrial development. In 2019, my country's dependence on foreign oil exceeded 70%, with a total consumption of 645 million tons. Our country has a vast territory, but the per capita oil volume is scarce, so improving oil recovery has become a top priority at present. After primary oil recovery and secondary oil recovery in old oil fields, about two-thirds of the oil in the underground oil reservoir has not been recovered, and it is difficult to increase the recovery rate by traditional extraction methods, so the development of new oil recovery technologies has become a researcher focus of attention. [0003] In recent years, tertiary oil recovery technology has bee...

Claims

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Application Information

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IPC IPC(8): C07C303/20C07C303/32C07C309/17C07C51/353C07C51/38C07C57/03C09K8/584C09K8/60
Inventor 程玉桥赵文辉牛春荣路双赵越张治婷冯喆杨杨
Owner TIANJIN POLYTECHNIC UNIV
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