334 results about "Bromide ions" patented technology

Provided is the following developer carrying member. The member has high charge-providing performance even under a high-temperature, high-humidity environment, and its surface layer hardly peels off its elastic layer even after long-term standing under the high-temperature, high-humidity environment. The developer carrying member comprises a mandrel, an elastic layer including a silicone rubber, and a surface layer covering a surface of the elastic layer, and the surface layer comprises a binder resin, and a copolymer having structural units of formula (1) and formula (2). R1 represents an alkyl group having 10-18 carbon atoms, R2 represents a methyl group or a hydrogen atom, R3 represents an alkylene group having 1-4 carbon atoms, X− represents a chloride ion, a bromide ion, or a p-toluenesulfonic acid ion, R4 represents a methyl group or a hydrogen atom, and R5 represents an alkylene group having 1-4 carbon atoms.

Disclosed is a method of preparing a biocide having improved durability of its biocidal activity as well as disinfection efficiency at an initial stage, comprising the steps of: (a) preparing stabilized alkali or alkaline earth metal hypochlorite having a pH at least 11 by mixing a chlorine oxidant including alkali or alkaline earth metal hypochlorite with a stabilizer in an alkali solution; (b) preparing a bromide ion source; and (c) adding the bromide ion source prepared in step (b) into the stabilized alkali or alkaline earth metal hypochlorite prepared in step (a). Also, a method of controlling the growth of microorganisms using a biocide prepared by the method of the present invention is disclosed.

Concurrently fed into a reaction zone held at about 10° C. or less are brominating agent, aluminum halide catalyst, and a solution of anionic styrenic polymer having a GPC Mn about 2000-30,000. The components are in at least two separate feed streams. The feeds are proportioned to maintain (a) the amount of aluminum halide being fed at about 0.8 mole percent or less based on the amount of aromatic monomeric units in the polymer being fed, and (b) amounts of brominating agent and unbrominated polymer in the reaction zone that produce a final washed and dried polymer product containing about 60-71 wt % bromine. The catalyst is deactivated, bromide ions and catalyst residues are washed away from the reaction mixture, and the brominated anionic styrenic polymer is recovered and dried. The dried polymer has a volatile bromobenzene content of about 600 ppm (wt / wt) or less as well as other beneficial properties.

The invention relates to a method for treating profenofos synthetic wastewater by using hydrogen peroxide, which comprises the following steps: after a proper amount of sulphuric acid is added to the wastewater to regulate the acidity of the wastewater, the hydrogen peroxide is added to the wastewater for heating reaction, bromide ions are oxidized into bromine, other organic matters are oxidized, the bromine is separated from the wastewater, and the wastewater from which the bromine is separated is neutralized; the temperature of oxidation reaction is 0 to 105 DEG C, sulphuric acid, hydrochloric acid, nitric acid, phosphoric acid or a mixture of the same can be added to the wastewater, the proper amount of acid is added for regulating the acidity of the wastewater until the concentration of hydrogen ions is 0.01 to 10.0 mol / L, the concentration of the hydrogen peroxide is 7 to 50 percent, the mol ratio of the hydrogen peroxide to the bromine in the wastewater is from 1:0.5-1:4, the hydrogen peroxide is added to the wastewater for reaction of 0.5 to 5.0 h, the wastewater introduced by a connecting pipe of a wastewater overhead tank and the hydrogen peroxide introduced by a connecting pipe of a hydrogen peroxide overhead tank are collected into an oxidation tower to for oxidation reaction, the upper end of a distillating tower is connected with a condensator by a pipeline, and a fine bromine output pipe is arranged after the condensation of the product of the oxidation reaction through a primary rectifying tower and a secondary rectifying tower. The invention has simple integral technology, good stability, high reliability and low operating cost.