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Preparation and production method of benzothiazole sterilizing liquid

A technology for producing benzothiazole and a production method, which is applied in the field of preparation of benzothiazole sterilizing liquid, can solve problems such as the decline of sterilization and anti-mildew effects, and achieve the effects of improving raw material utilization, improving product purity, and reducing production costs

Inactive Publication Date: 2017-07-07
CHANGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Add polyhexamethyleneguanidine hydrochloride to the preparation of the bactericidal solution to solve the problem that the bactericidal and anti-mildew effect of benzothiazole will be greatly reduced under alkaline conditions or in the presence of sulfides

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] (1) Stir 100g of 20% sodium hydroxide solution and cool it down to -5°C, slowly add 84g of benzothiazole thiol to pH 11.8, stir until it is completely dissolved, filter to remove insoluble impurities, and then add to the dripping liquid Add 4g of resin catalyst and 800g of bromochloromethane into a four-necked round-bottomed flask with funnel, thermometer, reflux condenser and mechanical stirrer, react at 45°C for 8h, filter to remove the resin catalyst, which can be reused, and separate the filtrate with a separatory funnel After layering, the oil layer was distilled to recover 670 g of bromochloromethane to obtain 145 g of 2-(chloromethylsulfur)benzothiazole.

[0014] (2) Add 120g of 2-(chloromethylthio)benzothiazole, 80g of ethanol, and 75g of sodium thiocyanate into a four-necked flask, heat it to 50°C for 20 hours under stirring, and evaporate the ethanol for reuse to obtain benzene 190 g of the thiazole oily product.

[0015] (3) Add 160 g of ethylene glycol mono...

Embodiment 2

[0017] (1) Stir 100g of 20% sodium hydroxide solution and cool it down to -5°C, slowly add 84g of benzothiazole thiol to pH 11.8, stir until it is completely dissolved, filter to remove insoluble impurities, and then add to the dripping liquid Add 8g of resin catalyst and 900g of bromochloromethane to a four-necked round-bottomed flask with funnel, thermometer, reflux condenser and mechanical stirrer, react at 45°C for 6h, filter to remove the resin catalyst, which can be reused, and separate the filtrate with a separatory funnel After layering, the oil layer was distilled to recover 765 g of bromochloromethane to obtain 148 g of 2-(chloromethylsulfur)benzothiazole.

[0018] (2) Add 120g of 2-(chloromethylthio)benzothiazole, 80g of acetone, 3g of tetrabutylammonium bromide, and 75g of sodium thiocyanate into a four-neck flask, heat to 50°C for 20h under stirring, and steam Acetone was removed to obtain 192 g of benzothiazole oily product.

[0019] (3) Add 160 g of ethylene gl...

Embodiment 3

[0021] Add 160 g of ethylene glycol monomethyl ether, 35 g of benzothiazole, and 10 g of polyhexamethyleneguanidine hydrochloride into a 500 ml four-necked bottle and stir until fully mixed to prepare a sterilizing solution. It can be used directly or added to water to make water emulsion.

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PUM

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Abstract

The invention discloses a preparation and production method of a benzothiazole sterilizing liquid, and provides a preparation and production method of a benzothiazole sterilizing liquid. The preparation and production method comprises the following steps of using benzothiazolethiolbenzothiazole as raw materials; under the condition of alkalinity and existence of a alkaline and catalyst, adding bromochloromethane, then controlling the temperature to 35 to 50 DEG C, and reacting for a period of time; filtering, washing by water, separating out lower solution, and evaporating the raw material, so as to obtain the 2-(chloromethylchlorophenyl sulfide)benzothiazole; adding into a reaction bottle, and further reacting with sodium thiocyanate for a certain of time at the temperature of 55 DEG C in an ethyl alcohol solution; recycling the ethyl alcohol, and adding a solvent and polyhexamethylene guanide hydrochloride into a product, so as to prepare the sterilizing liquid. The preparation and production method has the advantages that the technology is simple, and the production is convenient; the product can be directly used, or added with water to prepare emulsion for use, and the sterilizing effect is good; the benzothiazole sterilizing liquid is applied to the fields of leather treatment, coating, water treatment and the like, and has special effect for preventing and controlling bacteria, fungi and algae.

Description

technical field [0001] The invention belongs to the technical field of fungicides. More specifically, it relates to the preparation and production method of a benzothiazole sterilizing liquid. Background technique [0002] The fungicide benzothiazole is a broad-spectrum and efficient green fungicide. As a non-oxidative broad-spectrum bactericide and algicide, it has good killing effect on various fungi, algae and bacteria, including aerobic bacteria and anaerobic bacteria, and is widely used in leather, papermaking, industrial water treatment, bamboo and wood Mildew prevention, pesticide synergism and seed soaking and other fields. It is currently one of the most widely used fungicides in the world. [0003] The fungicide benzothiazole was first developed by Bakoman in the United States, and then improved in German patent DE3504966A1, but many catalysts are used in the reaction and the price is high. Due to the excellent anti-mold and bactericidal effects of benzothiazol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01N47/48A01N47/44A01P3/00A01P1/00C07D277/74
CPCA01N47/48A01N47/44C07D277/74A01N2300/00
Inventor 夏天喜
Owner CHANGZHOU UNIV