Delayed release biocide

A biocide, slow-release technology, applied in the field of an oxidized slow-release bromine biocide, can solve the problems of poor control of the bromine-chlorine mixture ratio, affecting the bactericidal effect, potential safety hazards, etc., to avoid instability factors, cost reduction, waste reduction effect

Inactive Publication Date: 2003-07-30
BC P INC CHINA NAT PETROLEUM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are safety hazards in the use of bromine chloride, the early product, because in case of leakage of gaseous oxidant, it will cause potential safety and harm; the mixtur

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] With the ratio of bromochlorodimethylhydantoin: sodium hypochlorite: dichloromethylethylhydantoin = 65:20:15, it is dried and granulated to make tablets, and it is used in an oil refining water field to reuse water in circulating water In the sterilization system in front of the field. The sewage reuse volume of the system is 20m 3 / h, heterotrophic bacteria before sterilization at 10 4 ~10 5 Between, seriously exceeding the index of supplementary water 10 2 pc / ml, the dosing adopts online continuous dosing, the residual chlorine is controlled at 0.2-0.3mg / L, and the index of heterotrophic bacteria reaches 10 2 A / ml or less. Meet the requirements of the circulating water system.

Embodiment 2

[0026] Bromochlorodimethylhydantoin: dichlorodimethylhydantoin: dichloromethylethylhydantoin = 75:10:15 is mixed by a solid mixer, dried and granulated to form a product. In the catalytic water field of an oil refinery, due to the frequent leakage of the system and the vicious cycle of water quality, it was used to control bacteria by alternate dosing of UCl, liquid chlorine and 1227. The monthly qualified rate of bacterial indicators was only about 50%, and sometimes 2 hours of liquid Chlorine, the residual chlorine reaction in circulating water is only 0.1mg / L. Later, chlorine dioxide was used as an oxidizing fungicide, and the effect was not significantly improved. And because the system retains a large amount of water of 5000m 3 , can not frequently do systematic sterilizing stripping and change the water body in a large amount, and have done a month's experiment with the granules of the medicament of the present invention. On the first day, 20ppm was added in shock, and...

Embodiment 3

[0027] Bromochlorodimethylhydantoin: Dichlorodimethylhydantoin: Ethyl cellulose = 80:13:7 The ratio is mixed by a solid mixer, dried and granulated, and then made into tablets to form a product .

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PUM

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Abstract

The slow release bromide biocide for disinfection of industrial water and public places consists of bromochloro dimethyl hydantoin as main component 50-80 wt%, other halogenated hydantoin as supplementary material 15-35 wt% and active adhesive 5-15 wt%, and is prepared into tablet or granule with controlled dissolving rate and thus delayed release function. It has the germicidal advantage of bromide biocide maintained and prolonged biocidal effect. Its slow release function is realized through both stepped reaction to release active components slowly and properly selected adhesive to control dissolving rate.

Description

technical field [0001] The invention relates to the field of sterilization treatment in the field of industrial water and the field of disinfection in public places (such as swimming pools, hotel toilets, etc. are also applicable), specifically, it is an oxidized slow-release bromine biocide. Background technique [0002] Bromine-based biocides are gradually adopted in industrial water systems because of their low dosage, good effect, and environmental friendliness. There are safety hazards in the use of bromine chloride, the early product, because in case of leakage of gaseous oxidant, it will cause potential safety and harm; the mixture of bromine and chlorine has problems such as poor control of the ratio and affecting the bactericidal effect, which restricts them. development in the field of application. Contents of the invention [0003] The purpose of the present invention is to provide: [0004] 1 The operation is safe and convenient, and the effect is stable. Th...

Claims

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Application Information

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IPC IPC(8): A01N43/50C02F1/50
Inventor 常春芝张健姚忠义肖兴成李艳姬雅红郭红梅杨砚生陈连军
Owner BC P INC CHINA NAT PETROLEUM CORP
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