37 results about "BCDMH" patented technology

A method for treating a recirculating water system which comprises introducing into said water system a multifunctional, multilayer tablet, wherein the multilayer tablet comprises a fast dissolving layer and a slow dissolving layer, wherein said fast dissolving layer releases a combination of active ingredients including a member selected from the group consisting of lithium hypochlorite, calcium hypochlorite, trichloroisocyanuric acid (TCCA), anhydrous sodium dichloroisocyanurate, sodium persulfate, potassium persulfate, potassium monopersulfate, sodium monopersulfate, and mixtures thereof, and at least one of a clarifier, chelating agent, sequesterant, algaestat, water softener, algaecide, corrosion inhibitor, scale inhibitor, flocculent, disintegrant, dispersant, colorant, dissolution control agent, fragrance, or surfactant and, wherein said slow dissolving layer includes a member selected from the group consisting of trichloroisocyanuric acid (TCCA), calcium hypochlorite, 1,3-dichloro-5,5-dimethylhydantoin (DCDMH), 1,3-dibromo-5,5-dimethylhydantoin (DBDMH), 1-bromo-3-chloro-5,5-dimethylhydantoin (BCDMH), 1,3-dichloro-5-ethyl-5-methylhydantoin (DCEMH), 1,3-dibromo-5-ethyl-5-methylhydantoin (DBEMH), 1-bromo-3-chloro-5-methyl-5-ethylhydantoin (BCEMH), and mixtures thereof, and at least one of a clarifier, chelating agent, sequesterant, algaestat, water softener, algaecide, corrosion inhibitor, scale inhibitor, flocculent, disintegrant, dispersant, colorant, dissolution control agent or surfactant.

The invention relates to an improved synthesis method for hydantoin bromo and for preparing dibromohydantoin or bromo-3-chloro-5,5-dimethylhydantoin. The method comprises the following steps of: taking various hydantoins as raw materials, dissolving the hydantoins and the corresponding amount of bromide in 0.2g / mL saturation chlorate solution, electrolyzing the bromide solution and obtaining the corresponding hypobromite, generating hypobromous acid under the condition of addition of acid, further performing bromo reaction to the hydantoin, adjusting the bromide equivalent according to demand and synthesizing the corresponding dibromohydantoin or bromo-3-chloro-5,5-dimethylhydantoin. Reaction liquid can be repeated and used, and the reaction yield can reach more than 95%. The invention has the advantages of easy obtainment of raw materials by low cost, low production cost, simple post treatment, high yield, good purity and repetitive recycle of the mother liquid. By utilizing the electrolysis process, the process is simple, and the equipment has low requirement, safe operation and no toxicity or stimulation.

The invention discloses a special composite antibacterial agent for a children bicycle. The special composite antibacterial agent comprises the following components by weight: 0.007-0.014 part of 1-bromo-3-chloro-5,5-dimethyl hydantoin, 100-200 parts of an inorganic antibacterial agent, 100-150 parts of dodecyl-dimethyl-benzyl ammonium chloride, 100-200 parts of microcrystal kaolinite powder, 50-80 parts of a fluoroalkyl silane coupling agent, 30-50 parts of 2,6-di-tert-butyl-4-methylphenol, and 10-20 parts of sulpho-bi-acrylate; the invention further provides a composite antibacterial coatingprepared from the composite antibacterial agent and a preparation method of the composite antibacterial agent. The body of the children bicycle has excellent antibacterial, bacteriostatic and sterilizing properties while the effects of attractiveness, decoration and rust resistance are achieved, various bacteria adhered to the surface of the body are effectively killed, the cross propagation of the bacteria is completely eradicated for the children in the process of touching and playing with the bicycle, the bacterial infection is avoided, and the body health of the children is guaranteed.

The invention discloses a continuous production method of bromochlorohydantoin, which belongs to the technical field of disinfectant production and comprises the following steps: synthesizing 5,5-dimethylhydantoin-5,5-dimethylhydantoin to remove ammonia from water ‑Preparation of bromochlorohydantoin. The present invention utilizes water, ammonia gas, carbon dioxide and acetone cyanohydrin as raw materials to react and synthesize 5,5-dimethylhydantoin; 5,5-dimethylhydantoin is passed into an aqueous solution to remove dissolved ammonia; 5, After adding 5-dimethylhydantoin and inorganic alkali into the reaction kettle to cool down, bromine and chlorine gas are introduced to carry out bromine chlorination reaction. After the reaction, the reaction materials are centrifugally dried and dried to prepare powdered bromochlorohydantoin. The present invention removes the dissolved ammonia in the 5,5-dimethylhydantoin aqueous solution by an inert gas, and then synthesizes bromochlorohydantoin, thereby reducing production steps, production costs and potential safety hazards, and at the same time adopts a transportation pipeline to link various processes to realize The continuous production from the synthesis of dimethylhydantoin to bromochlorohydantoin.

The present invention relates to detergent, and is especially one kind of detergent containing bromochloro hydantoin. The detergent of the present invention consists of bromochloro hydantoin in 0.1-50wt% and other detergent in 50-99.9 wt%.

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.

The invention relates to a tail gas treatment process in the synthesis process of bromochlorohydantoin. The tail gas treatment process includes the first step of taking 5,5-dimethylhydantoin as a rawmaterial to prepare bromochlorohydantoin in a synthesis kettle; leading synthesis kettle tail gas into a tail gas absorption kettle, and evacuating the tail gas absorption kettle through an environmental protection absorption tower; wherein tail gas absorption liquid is disposed in the tail gas absorption tank and is aqueous solution of 5,5-dimethylhydantoin and sodium hydroxide or mixed liquid of5,5-dimethylhydantoin and dibromohydantoin mother solution of sodium hydroxide; leaching absorption liquid is disposed in the environmental protection absorption tower and is sodium hydroxide aqueoussolution and a mixture of sodium hydroxide and dibromohydantoin mother solution; the second step of transferring the tail gas absorption liquid in the tail gas absorption kettle into the synthesis kettle after the synthesis kettle is empty, transferring the leaching absorption liquid in the environmental protection absorption tower into the tail gas absorption kettle, and adding 5,5-dimethylhydantoin. According to the tail gas treatment process, the tail gas generated by the synthesis process of bromochlorohydantoin undergoes two-stage absorption by the tail gas absorption kettle and the environmental protection absorption tower and meets the requirements of environmental protection discharge.

The invention discloses a production method of bromo-3-chloro-5,5-dimethylhydantoin (BCDMH) serving as a chemical intermediate. The production method comprises the following steps that A, 5,5-dimethylhydantoin, flake caustic soda, liquid bromine and chlorine react; a reaction material is obtained; B, the reaction material is subjected to centrifugal spin-drying by a scraper bottom unloading centrifuge, subjected to centrifugal washing by deionized water, and spin-dried; a wet product after centrifugal treatment is dried to form a dry product; and C, the dry product is dissolved by acetone, and filtered; after the deionized water is added for diluting and cooling, BCDMH is separated through crystallization; and the dried wet product is BCDMH capable of serving as a chemical oxidizing agent. The content of BCDMH prepared by the method reaches above 99.3%; the content of bromine is 32.85%; the content of chlorine is 14.70%; a trichloromethane insoluble substance is less than or equal to 0.03%; iron ions are less than or equal to 8mg / kg; calcium ions are less than or equal to 24mg / kg; and BCDMH can serve as the chemical intermediate.

The invention belongs to the technical field of disinfection, and discloses a disinfector containing BCDMH (Bromochloro Hydantoin) and a preparation method thereof. The disinfector comprises 10-25wt% of BCDMH, 5-25wt% of 5, 5-dimethyl hydantoin, 2-5wt% of surfactant, 5-10wt% of bonder, 10-20wt% of stabilizer, and 30-55wt% of effervescing agent. The disinfector uses the polyethylene glycol bonder to ensure the stability of BCDMH and 5, 5-dimethyl hydantoin with a Twain surfactant based on a slow release effect, so as to further prevent BCDMH from being degraded to 5, 5-dimethyl hydantoin.