Novel corrosion-retarding germicide and its preparation method
A bactericide and corrosion inhibition technology, applied in the direction of bactericide, botanical equipment and method, biocide, etc., can solve the problems that corrosion inhibitors have no bactericidal effect and poor ability to inhibit biological corrosion, and achieve low production costs and reduce water consumption. Effects of surface tension and ease of operation
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Embodiment 1
[0050] In a 250ml four-neck flask equipped with a stirring and condenser, add 29.5g (0.25mol) of benzimidazole, 150ml of toluene, 41.6g (0.28mol) of n-octane chloride, 0.8g (0.0025mol) of tetrabutylammonium bromide mol). Start stirring, slowly heat up to 60° C., and add 60 g of 50% sodium hydroxide solution dropwise. After the addition was completed, the mixture was kept at 70°C for 8 hours. The oil layer was separated, the water layer was extracted with toluene, the combined organic liquid was washed with water until neutral, and dried with calcium chloride. The toluene was distilled off under reduced pressure to obtain 49.6 g of N-n-octyl benzimidazole with a yield of 86.3%.
[0051] In a 250ml four-neck flask equipped with a stirring and condenser, 34.5g (0.15mol) of the intermediate product N-n-octylbenzimidazole and 150ml of acetonitrile were added. Stirring was started, and 20.2 g (0.16 mol) of dimethyl sulfate was added dropwise at 40°C. After the addition was compl...
Embodiment 2
[0053] In a 250ml four-necked flask equipped with a stirring and condenser, add 29.5g (0.25mol) of benzimidazole, 150ml of dichloroethane, 57.4g (0.26mol) of n-bromodecane, benzyltriethyl chloride Ammonium 1.4g (0.006mol). Start stirring, slowly heat up to 60° C., and add 60 g of 50% sodium hydroxide solution dropwise. After the addition was completed, the mixture was incubated at 70°C for 8 hours. The oil layer was separated, the water layer was extracted with dichloroethane, the combined organic liquid was washed with water until neutral, and dried with calcium chloride. Dichloroethane was distilled off under reduced pressure to obtain 57.5 g of N-n-decylbenzimidazole with a yield of 89.2%.
[0054] In a 250ml four-necked flask equipped with a stirring and condenser, 38.7g (0.15mol) of the intermediate product N-n-decylbenzimidazole and 180ml of acetonitrile were added. Stirring was started, and 25.2 g (0.20 mol) of dimethyl sulfate was added dropwise at 55°C. After the ...
Embodiment 3
[0056] In a 250ml four-necked flask equipped with a stirring and condenser, add 29.5g (0.25mol) of benzimidazole, 150ml of toluene, 59.3g (0.29mol) of n-dodecane chloride, and 1.4 g of benzyltriethylammonium chloride g (0.006 mol). Start stirring, slowly heat up to 60° C., and add 60 g of 50% sodium hydroxide solution dropwise. After the addition was completed, the mixture was kept at 70°C for 8 hours. The oil layer was separated, the water layer was extracted with toluene, the combined organic liquid was washed with water until neutral, and dried with calcium chloride. The toluene was distilled off under reduced pressure to obtain 65.1 g of N-n-dodecylbenzimidazole with a yield of 91.0%.
[0057] In a 250ml four-necked flask equipped with a stirring and condenser, 42.9g (0.15mol) of the intermediate product N-n-dodecylbenzimidazole and 200ml of dichloroethane were added. Stirring was started, and 31.5 g (0.25 mol) of dimethyl sulfate was added dropwise at 60°C. After the ...
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