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Quaternary ammonium salt germicidal algicide and synthetic method and application thereof

The technology of bactericidal algicide and quaternary ammonium salts is applied in the field of water treatment agent and its preparation to achieve the effect of improving bacteriostatic activity, being easy to degrade and improving bactericidal activity

Inactive Publication Date: 2013-02-27
ANHUI XINLT POWER TECH CONSULTING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For large-scale cooling water systems, the applicant has not seen no oxidizing biocide so far, but only non-oxidizing biocide reports

Method used

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  • Quaternary ammonium salt germicidal algicide and synthetic method and application thereof
  • Quaternary ammonium salt germicidal algicide and synthetic method and application thereof
  • Quaternary ammonium salt germicidal algicide and synthetic method and application thereof

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Embodiment Construction

[0032] 1. Preparation of intermediate (I) 2-methylbenzimidazole

[0033] Add phosphoric acid with a solvent mass concentration of 85% and polyphosphoric acid with a mass concentration of 86% in a 250mL three-necked flask, the volume ratio of phosphoric acid and polyphosphoric acid is 1:1, heat with an electric heating mantle, turn on the stirrer, add o-phenylenediamine and acetic acid, Raise the temperature to 120-130°C and react for 10 hours. After the reaction is complete, cool the reaction solution, pour the reaction solution into a beaker, add dropwise 10% sodium hydroxide solution, adjust the pH to neutral, and a large amount of light yellow flocculent precipitates appear, continue to add dropwise until the pH reaches alkaline. After it was cooled to about 20-40°C, the crude product in the form of light yellow mud was obtained by suction filtration. Heat and melt the crude product, add activated carbon to decolorize after melting, cool down after decolorization, and recr...

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Abstract

A quaternary ammonium salt germicidal algicide is represented by a chemical formula: 1-ethyl methyl ether-2-methyl-3-R based benzimidazole quaternary ammonium salt, wherein the X is -CH2OCH2CH3, and the R is selected from C3-C16 carbon alkyl. The quaternary ammonium salt germicidal algicide uses o-phenylenediamine and acetic acid as raw materials, is obtained through closed loop, substitution and quaternary ammonium salinization, is applied to industrial recycling cooling water, and is easy to degrade and environment-friendly.

Description

1. Technical field [0001] The invention relates to a water treatment agent and a preparation method thereof, in particular to an industrial circulating cooling water treatment agent and a preparation method thereof, specifically a quaternary ammonium salt bactericide and algaecide, a synthesis method and application thereof. 2. Background technology [0002] In 1915, Jocobs synthesized quaternary ammonium salt surfactant for the first time, and pointed out that this compound had a certain bactericidal effect, but it did not attract attention. In 1935, Domagk further studied the relationship between its bactericidal effect and its chemical structure. After Wetzel conducted a clinical disinfection test, it gradually attracted attention. In 1964, my country studied the bactericidal effect of a quaternary ammonium compound - benzalkonium bromide (brogeramine), and it was recommended as a disinfectant after 1971. [0003] Quaternary ammonium surfactants all contain an ionized ni...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N43/52A01P1/00C02F1/50
Inventor 张强郑敏聪李建华梁琳琳
Owner ANHUI XINLT POWER TECH CONSULTING