Industrial producing method for powder, particle and sheet bromine-chlorine-dimethyl hydantoin disinfectant

Abstract

The invention discloses an industrial production method of fine powder, granular and tablet bromo-chloro-dimethyl hydantoin disinfectants, which includes the 5,5-dimethylhydantoin and the flake caustic soda put in a reaction vessel and dissolved in water. The brine is frozen for cooling. With the use of bromine and the chlorine added, the reaction solution is obtained. The reaction solution is put into a filtration tank. After the vacuum filtrating, the ionic water leaching and purification and the centrifuge dripping, the wet products enter a dryer for drying. Thus the powder bromo-chloro-dimethyl hydantoin is obtained after the crushing. A granulator is used for the powder granulation so that the granular bromo-chloro-dimethyl hydantoin can be obtained. The particles poured into a blender are mixed with the adhesives and lubricants to blend evenly, which enter a preforming machine for tabletting, thus the tablet bromo-chloro-dimethyl hydantoin can be obtained. In the invention, the prior production method feeding order of powder bromo-chloro-dimethyl hydantoin is changed, and the processes such as leaching purification, roll dry granulation are added. The degree of purity of powder and granular products produced reach 99.1%, while that of the tablet product is 98%. With low production cost and simple equipment operation, the waste gas and trash discharge almost do not occur.

Description

technical field [0001] The invention relates to a preparation method of bromochlorohydantoin disinfectant, which belongs to the industrial production method of powder, granule and sheet-shaped bromochlorohydantoin disinfectant. Background technique [0002] The full name of bromochlorohydantoin is 1-bromo-3-chloro-5,5-dimethylhydantoin, also known as 1-bromo-3-chloro-5,5-dimethylhydantoin, chemical name 1- Bromo-3-chloro-5,5-dimethyl-2,4-imidazolidinedione. Bromochlorohydrin is a high-efficiency disinfectant, mainly used for killing bacteria and algae in cooling water systems, disinfection and purification of swimming pool water, disinfection of aquaculture water bodies, disinfection and sterilization of animal pens and utensils used in animal husbandry, non-metallic medical treatment Disinfection and sterilization of utensils, surfaces of various objects, fruits and vegetables, etc. Bromochlorohydantoin began to be used in swimming pools in 1970, and was used in cooling w...

AI Technical Summary

Problems solved by technology

Among them: in the production process, the first method hypohalite is easy to decompose, the reaction yield is low, and the process is complicated and no industrial production has been seen; the fourth method is easy to operate and the process is simple, but the consumption of chlorine gas is large and the production cost is high; currently The third production method is mostly adopted at home and abroad, which is to dissolve 5,5-dimethylhydantoin in water and feed liquid bromine and chlorine gas, and at the same time drop liquid caustic soda to regulate the pH value of the reaction process, and the final pH value of the reaction is Between 5.5 and 6.5, after the process is dissolved, halogenated, washed, filtered and dried, bromochlorohydantoin with a purity of 95-97.5% is obtained, and the yield is 98%, but the process of dripping liquid caustic soda is not easy to control

The disadvantages of the products obtained by the above-mentioned several powder product production methods are low purity and inconvenient use. Therefore, it is necessary to develop a high-content bromochlorhydantoin powder, granule and tablet disinfectant that can be used in different use processes for industrialization. The production process is imperative