Gemini nicotinate quaternary ammonium salt and method for making same

A technology of quaternary ammonium salt and nicotinic acid, which is applied in chemical instruments and methods, organic chemistry, transportation and packaging, etc. It can solve the problems of reduced use effect, low bactericidal concentration, and large water solubility, and achieve weak foaming and high Effect of surface activity and strong sustained-release ability

Inactive Publication Date: 2010-04-07
CHINA WEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These cationic surfactants have the advantages of broad-spectrum antibacterial and antibacterial ability, odorless, large water solubility, and low irritation. For example, 1227 has low bactericidal concentration, good water solubility, and low toxicity and irritation, but the price is high. The bactericidal effect also has a certain influence
In practical application, it is also found that if a surfactant is used for a long time in the same system, the drug resistance produced by microorganisms will significantly reduce the use effect (Huang Qiran, Tang Xiaoyan, Chen Xiaodan. Synthesis and bactericidal performance research of new double quaternary ammonium salt fungicides [J]. Guangdong Chemical Industry, 2007, 34 (3): 9-10), such as 1227, the amount of killing sulfuric acid reducing bacteria in oil field reinjection water is from 30mg / L to 100mg / L, so it is necessary to seek new sterilization agent

Method used

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  • Gemini nicotinate quaternary ammonium salt and method for making same
  • Gemini nicotinate quaternary ammonium salt and method for making same
  • Gemini nicotinate quaternary ammonium salt and method for making same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Preparation of brominated di-N-alkylnicotinic acid ethylene glycol / diethylene glycol / triethylene glycol ester (EQn-m-n)

[0034] Synthesis of EQ16-2-16

[0035] Add nicotinic acid and thionyl chloride at a molar ratio of 1:5 into the reaction flask, stir and reflux, and NaOH solution absorbs the tail gas. After reacting for 4 hours, it was cooled, and the excess thionyl chloride was spin-dried under reduced pressure to obtain white needle-like crystals. Using dry chloroform as a solvent, slowly drop triethylene glycol with a molar ratio of 1:2 to nicotinic acid, NaOH solution to absorb tail gas, and reflux for 10 h. After cooling, the solvent was spin-dried, and an appropriate amount of water was added to dissolve it, and saturated Na 2 CO 3 Adjust the pH of the aqueous solution to be weakly alkaline, separate the organic phase, extract the aqueous phase with ethyl acetate 2-3 times, combine the organic phases, spin dry and pass through the column with ethyl acetate,...

Embodiment 2

[0044] Structural Characterization of Brominated Di-N-Alkyl Nicotinic Acid Ethylene Glycol / Diethylene Glycol / Triethylene Glycol Ester (EQn-m-n)

[0045] Structural characterization of EQ16-0-16

[0046]

[0047] see figure 1 , figure 1 It is the hydrogen spectrum of EQ16-0-16. According to the spectrum, the chemical shift and related parameters of EQ16-0-16 are listed in the following table 1:

[0048] Table 1EQ16-0-16 1 HNMR parameters

[0049]

[0050] It can be seen from Table 1 that groups 1, 2, 3, and 4 are the hydrogen on the pyridine ring, group 5 is the hydrogen methylene directly connected to nitrogen, group 6 is the hydrogen methylene directly connected to the oxygen on the ester group, and group 7 is hydrogen directly connected to the oxygen on the ester group. , Group 8 is the methylene hydrogen on the long-chain alkane, and group 9 is the methyl hydrogen at the end of the long-chain alkane. The total number of hydrogen atoms is half of the number of hyd...

Embodiment 3

[0067] Study on Surface Activity of Brominated Di-N-Alkyl Nicotinic Acid Ethylene Glycol / Diethylene Glycol / Triethylene Glycol Ester (EQn-m-n)

[0068] The surfactant to be measured is prepared into a series of aqueous solutions of a certain concentration with twice distilled water, and the surface tension of the aqueous surfactant solution is measured by the suspension ring method at 20°C. Measurement results such as Figure 4 and shown in Table 4.

[0069] from Figure 4 As seen in , with the addition of this series of surfactants, the surface tension of water drops sharply, and the concentration increases, the surface tension decreases slowly, and finally tends to be stable. The alkyl chain grows and the surface activity increases.

[0070] Table 4 cmc, γ of several surfactants cmc and C 20

[0071]

[0072]

[0073] Note: C 20 It represents the concentration of surfactant required to reduce the surface tension of water by 20mN / m. CTAB and CPB are two common ca...

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Abstract

The invention relates to a gemini nicotinic acid ester quaternary ammonium salt, namely a bromide bi-N-alkyl nicotinic acid athylene glycol / diethylene glycol / triethylene glycol, the preparation methodof which is given as follows: (1) the nicotinic acid and the thionyl chloride are added in a reaction bottle in a molar ratio of the nicotinic acid to the thionyl chloride ranging from 1:3 to 1:6; after the reaction between the nicotinic acid and the thionyl chloride lasts for 2 to 4 hours, the nicotinic acid acyl chloride which is in a white needle-shaped crystal is obtained; (2) the nicotinic acid acyl chloride is dissolved in the dried chloroform and then the alcohol with a molar ratio to the nicotinic acid of 1:2 is dropped slowly in the mixtures of the nicotinic acid acyl chloride; the alcohols can be ethylene glycol, diethylene glycol or teg; the alcohols are dissolved by adding a proper amount of water and the nicotinates which are the products of the alcoholysis are subject to thepumping filtration and drying; (3) the nicotinate and the alkyl bromide are added in the reaction bottle in a molar ratio of the nicotinate to the alkyl bromide ranging from 1:2 to 1:6; the number ofthe carbon atoms of the alkyl bromide is 8, 10, 12, 14 or 16; the anhydrous acetonitrile is used as the solvent and the mixtures in the reaction bottle are heated and refluxed for 30 to 40 hours; after the mixtures are subject to the washing and pumping filtration, the products, gemini nicotinic acid ester quaternary ammonium salts, are obtained. The gemini nicotinic acid ester quaternary ammonium salt has very high surface activity and very strong bactericidal performances and corrosion inhibition, the preparation method of the invention is simple, convenient and feasible, is easy to be operated, delivers high yield and causes no environmental contaminations.

Description

technical field [0001] The invention relates to a gemininic acid ester quaternary ammonium salt and a preparation method thereof. Background technique [0002] Surfactants have become indispensable chemicals in the national economy and human daily life. It is widely used in the fields of energy mining, metal processing, textile, daily chemical industry, food and pharmaceuticals. In 1935, Domagk discovered that cationic surfactants have bactericidal ability, the representatives of which are quaternary ammonium salt-type surfactants, in addition to pyridinium salts, imidazoline salts, and isoquinoline salts. Gemini quaternary ammonium compounds are characterized by their low toxicity, high efficiency, broad-spectrum antibacterial properties and extensive biological activity (Nagamune H et al.Evaluation of the Cytotoxic Effects of Bis-quaternary Ammonium Antimicrobial Reagents on HumanCells[J].Toxicology in Vitro , 2000, 14:139-147), has been widely used in medicine, food, co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07D213/80B01F17/18C09K23/18
Inventor 蒋晓慧刘红星
Owner CHINA WEST NORMAL UNIVERSITY
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