121 results about "Bromine Compounds" patented technology

Bromine-containing compounds, added to the coal, or to the boiler combustion furnace, are used to enhance the oxidation of mercury, thereby enhancing the overall removal of mercury in downstream pollution control devices. The method is applicable to utility power plants equipped with wet FGD systems, as well as those plants equipped with spray dryer absorber FGD systems.

The invention discloses a preparation method of BiOBr/ZnO nano photocatalyst powder, belonging to the field of nano photocatalyst preparation. The method is characterized by comprising the steps of adding two bromine compounds CTAB (cetyl trimethyl ammonium bromide) and potassium bromide or sodium bromide at a proper proportion and a zinc-containing compound into an ethanol solvent, adding a bismuth-containing compound, and uniformly mixing; transferring the solution into a Teflon high-pressure reaction kettle, and performing a solvothermal reaction at certain temperature to generate precipitates; washing the precipitates with water and ethanol, and drying at 80 DEG C to obtain novel efficient BiOBr/ZnO nano photocatalyst powder. The method disclosed by the invention is quick, simple, convenient and high in operability, and the prepared BiOBr/ZnO heterojunction nano photocatalyst powder has perfect photocatalytic degradation efficiency on organic pollutants as well as good reusability.

There is provided a method of forming a thin film of vinylidene fluoride homopolymer having crystal form I which is applicable to various substrates in relatively easy way (coating conditions, application method, etc.), a process for preparing a vinylidene fluoride homopolymer having crystal form I efficiently at high purity, and novel vinylidene fluoride homopolymers which can give a thin film being excellent in ferroelectricity. The method of forming a thin film of vinylidene fluoride homopolymer comprises (i) a step for preparing a green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component by subjecting vinylidene fluoride to radical polymerization in the presence of a bromine compound or iodine compound having 1 to 20 carbon atoms which contains at least one moiety represented by —CRf¹Rf²X¹, wherein X¹ is iodine atom or bromine atom; Rf¹ and Rf² are the same or different and each is selected from fluorine atom or perfluoroalkyl groups having 1 to 5 carbon atoms and (ii) a step for forming a thin film on a substrate surface by using vinylidene fluoride homopolymer which comprises crystal form I alone or as main component and is obtained from the green powder product of vinylidene fluoride homopolymer comprising crystal form I alone or as main component.

An epoxy resin composition contains (A) an epoxy resin having an epoxy equivalent of at least 185 and possessing a skeleton having a structure in which two benzene rings are conjugable to each other directly or via an aliphatic unsaturated double bond, carbon atoms having an atomic orbital of SP2 type accounting for at least 50% of the carbon number, (B) a phenolic resin having a hydroxyl equivalent of at least 160, carbon atoms having an atomic orbital of Sp2 type accounting for at least 85% of the carbon number, (C) a polyimide resin in an amount of 1-20 parts by weight per 100 parts by weight of components (A) and (B) combined, and (D) 70-85% by volume of the entire composition of an inorganic filler. The composition cures into products having flame retardancy and high-temperature reliability even though it is free of bromine compounds and antimony compounds.

The invention relates to an epoxy resin composition for packaging semiconductors. The composition contains epoxy resin, a phenolic resin curing agent, a curing promoting agent and inorganic filler. The composition is characterized in that the phenolic resin curing agent is phenolic resin containing the following formula (I), wherein n=1-10, and R is H, CH3 or CF3. The epoxy resin composition can be used for effectively packaging various semiconductor devices, such as transistors and integrating circuits. The epoxy resin composition has no damage to the human body health and environments. Because the bromine compounds and antimonide are not contained, the epoxy resin composition is a green environment-protection product and is suitable for a low-pressure transfer forming process for molding, and the cured and formed semiconductor device has good flame retardant property and thermal-humidity reliability.

The invention discloses a chemical fiber oil agent bactericidal and preservative and a preparation method thereof. The chemical fiber oil agent is composed of thiocyanate-containing compounds, organic bromine compounds, isothiazolone compounds and other bactericidal and antiseptic active ingredients, auxiliary agents, emulsification agents, etc. agent, surfactant, and a balanced amount of propylene glycol. The percentage by weight of the preparation is: 0.5-5.0% of thiocyanate compound, 0-15% of organic bromine compound, 0.5-5.0% of isothiazolone compound, 1.0-3.5% of emulsifier, 0-10% of auxiliary agent, surface Active agent 0-15% and balance propylene glycol. The preparation is prepared by first preparing thiocyanate compounds, organic bromine compounds and isothiazolone compounds under normal pressure and room temperature, then adding the remaining raw materials, mixing and stirring, and organically combining sterilization and antiseptic drugs. The chemical fiber oil has the advantages of good compatibility, low production cost, etc., and is convenient to use, safe and reliable, and easy to implement.

The present invention relates to a novel method for producing aromatic chlorine or bromine compounds having the formula (II) by diazotization of formula (I) in the presence of aqueous hydrochloric or hydrobromic acids using sodium nitrite or potassium nitrite and subsequent conversion with an iron (II) or iron (III) compound, optionally in the presence of additional amounts of hydrogen chloride or bromide or alkaline or alkaline earth chlorides or bromides.

The invention provides hydantoin composite effervescent disinfectant tablets and a preparation method thereof. The components of the composite effervescent disinfectant tablets comprise hydantoin bromine-containing compounds, an antimicrobial traditional Chinese medicine extract and effervescent tablet accessories, wherein the concentration of the antimicrobial traditional Chinese medicine extract is that 1 gram of disinfectant tablets contains 0.1 to 10 grams of crude drugs; the content of the antimicrobial traditional Chinese medicine extract is 3 to 30 percent of the total weight; the content of the hydantoin bromine-containing compounds is 0.1 to 30 percent of the total weight; and the balance is the effervescent tablet accessories. The preparation method comprises the following steps that: in an environment at the humidity of between 20 and 45 percent, polyvinylpyrrolidone, potassium bromide, the antimicrobial traditional Chinese medicine extract, sodium carbonate and sodium bicarbonate are well mixed to give a first mixture; the hydantoin bromine-containing compounds, adipic acid, sodium sulfate and citric acid are well mixed to give a second mixture; and the first mixture and the second mixture are mixed well, sieved and tabletted. The composite effervescent disinfectant tablets have the advantages of low toxicity, environmental protection and high efficiency.

The invention relates to the field of environmental purification and disinfectants, in particular to a chlorine dioxide solid releasing agent and a preparation method thereof.The chlorine dioxide solid releasing agent is prepared from the following raw materials in parts by weight:4-26 parts of chlorite,10-65 parts of a bromine-containing inorganic salt activator and 5-20 parts of a passivation stabilizer, wherein a tasteless bromine-containing inorganic compound is used for firstly forming hypobromous acid and then activating sodium chlorite under an acidic condition;hypobromous acid has stronger oxidizing ability than hypochlorous acid and does not produce chloroform, thereby quickly producing high purity and high yield of chlorine dioxide and being less affected by temperature and reaction time;no secondary pollution occurs during use. According to the preparation method of the chlorine dioxide solid releasing agent, chlorine odor is not produced during the production and preparation process, and the production environment and the health of workers are effectively protected;the bromine-containing compound formed during the activation process has higher oxidation performance thanchlorine-containing compound, so the use concentration is lower,the disinfection effect is better and the application range is wider.

A method for purifying a bromine compound by depositing the bromine compound represented by the following general formula (1) as solid particles from a crude solution containing the bromine compound:wherein(i) the crude solution is supplied into the slurry containing the particles of the bromine compound;(ii) the concentration of the particles of the bromine compound in the slurry is maintained at a predetermined range;(iii) the solvent contained in the slurry is a mixed solvent of a good solvent and a poor solvent and the ratio of the good solvent to the poor solvent is maintained at a predetermined value; and(iv) the solid particles of the bromine compound are separated from the slurry.

The invention provides a niobium-doped bismuth oxybromide catalyst and a preparation method and a use method thereof. The preparation method comprises the following steps: 1, heating an alcohol solvent until the alcohol solvent is boiled, and naturally cooling, 2, sequentially adding a bismuth salt compound, a niobium compound and a bromine compound, mixing and fully stirring, 3, adding a neutralsolution, 4, carrying out high-pressure constant-temperature reaction, and 5, cooling to room temperature, carrying out centrifugal separation, respectively washing with water and an ethanol solution,drying, and collecting the powder to obtain the flower-ball-shaped niobium-doped bismuth oxybromide. The photocatalyst prepared by the preparation method disclosed by the invention is Nb-BiOBr, the photocatalyst has good visible light photocatalytic degradation organic matter performance, higher photocatalytic activity and photo-induced electron hole separation efficiency, the degradation efficiency of the photocatalyst is 6.4 times that of BiOBr in the prior art, and the photocatalyst is environmentally friendly, harmless, low in price, controllable in method and easy to operate and has wideapplication prospects in the field of environmental pollution and governance.

The invention relates to improved biological control by using a chlorine-stabilizing agent mixture. The invention discloses a composition and an application method thereof. The composition comprises a halogen source, urea, an extra halogen stabilizing agent excluding urea and optional alkalis with concentrations enough to provide a pH value more than 10 for the composition, and does not comprise stable bromine compounds optionally. Besides, the invention discloses a method for reducing bioactivity in a process stream. Through the optimized mixing ratio of the halogen and the stabilizing agent and mixing ratio of ammonium salt and sulfamic acid or sulfamate, synergy appears, which not only improves the effect of the composition as a biocide but also avoids adverse effects on other chemicals (such as paper pulp and paper additives in the papermaking water flow) in the water flow.

Flame-retarded foamable styrene-based resin beads and a process for producing the resin beads are provided in which a combination of two organic bromine-containing compounds is used in order to accomplish a high flame retardancy level with a small amount of addition and decreased level of residual monomer. The flame-retarded foamable resin beads comprises a blowing agent added to resin beads by impregnating with the blowing agent during or after polymerization. The beads are produced by suspension polymerizing a monomer composition containing 0.5 to 5.0 parts by weight per 100 parts by weight of the monomer of a bromine-containing flame retardant comprising (a) an organic bromine-containing compound having 2,3-dibromo-2-alkylpropyl group and (b) an organic bromine-containing compound having a bromine content greater than 50 wt % and free of any bromine atom attached to a tertiary carbon atom.

A process for preparing a polydiene, the process comprising the step of polymerizing conjugated diene monomer in the presence of a dihydrocarbyl ether, where said step of polymerizing takes place within a polymerization mixture that includes less than 20% by weight of organic solvent based on the total weight of the polymerization mixture, and where said step of polymerizing employs a lanthanide-based catalyst system that includes the combination of or reaction product of ingredients including (a) a lanthanide compound, (b) an aluminoxane, (c) an organoaluminum compound other than an aluminoxane, and (d) a bromine-containing compound selected from the group consisting of elemental bromine, bromine-containing mixed halogens, and organic bromides.

The invention discloses a synthetic method of 3,6-dihydro-2H-pyran-4-boronic acid pinacol ester, which comprises the following steps: 1) carrying out a reaction of tetrahydro-4H-pyran-4-one and hydrazine hydrate in a solvent to generate single ketone hydrazone; 2) carrying out a reaction of the single ketone hydrazone and copper bromide in a solvent in the presence of triethylamine to obtain a dibromo intermediate; 3) carrying out an elimination reaction of the dibromo intermediate and an alkali in a solvent to obtain an alkenyl bromide compound; 4) carrying out a Suzuki-Miyaura reaction of the alkenyl bromide compound and bis(pinacolato)diboron in a solvent in the presence of a palladium complex to obtain the product. The synthetic method of the invention is simple, and low in cost, adopts no dangerous raw materials, and is safe and suitable for large-scale production.

The invention discloses a coal-fired flue gas demercuration method employing an additive and an adsorbent. The additive is one of or a mixture of more or bromine compounds, wherein the bromine compounds comprises NaBr, KBr, NaBrO3, KBrO3 and CaBr2 aqueous solutions, the concentrations of which are separately 0.1-5mol/L, 0.1-3mol/L, 0.1-1mol/L, 0.1-1mol/L and 0.1-5mol/L; the adsorbent is one of or a mixture of more of active carbon, active coke and Br-carrying modified active carbon, wherein the Br-capacity of the Br-carrying modified active carbon is 1-10wt%. The additive is added into a boiler of a coal-fired glue gas combustion system and the adsorbent is sprayed on an upstream flue of a dedusting device of a flue gas purification system. The synergistic demercuration action of the method is maximized, and the existing pollutant removal equipment can be utilized, so that the coal-fired flue gas demercuration method has the advantages of simple process, high demercuration efficiency, low cost and the like.

The invention discloses a composite type sterilizing agent composition for treating industrial water. Sterilizing agents of the composite type sterilizing agent composition comprise, by weight, 50-90 parts of bromine compounds, 40-70 parts of amphoteric sterilizing agents, 1-15 parts of dispersing agents, 1-5 parts of inorganic acid, 0.5-3 parts of polymerization inhibitors, 5-10 parts of potassium hydroxide and 10-50 parts of deionized water. The composite type sterilizing agent composition has the advantages that the bromine compounds and the amphoteric sterilizing agents are compounded with one another, potential of various components can be played to the greatest extent under the synergistic effects, and accordingly requirements on microbial diversity sterilization treatment on the industrial water can be met; the sterilizing agents are low in toxicity and easy to degraded, and corrosion inhibition sterilization effects can be realized.

The invention discloses a method for preparing a 1,4-dicarbonyl derivative. The method comprises the following step of performing an oxidative coupling reaction on olefins in an organic solvent by taking a styrene derivative and a bromine-containing compound as reactants, a metallic cobalt compound as a catalyst and tertiary butanol hydrogen peroxide as an oxidizing agent, thereby preparing the 1,4-dicarbonyl derivative. The method disclosed by the invention is moderate in reaction condition, and simple in reaction process and aftertreatment because being only performed in the air, so that the 1,4-dicarbonyl derivative can be obtained by performing a simple column chromatography after the reaction is finished. In addition, raw materials for the reaction can be obtained widely, so that the method conforms to the requirement and the direction of the modern environment-friendly chemical development. Thus, the method has an industrial application value.

The invention discloses application of a composition of sulfamic acid or salts thereof and ammonium salt and/or amine or other biocides containing halogens in the papermaking field. The invention discloses a composition and an application method thereof. The composition comprises a halogen source, urea, an extra halogen stabilizing agent excluding urea and optional alkalis with concentrations enough to provide a pH value more than 10 for the composition, and does not comprise stable bromine compounds optionally. Besides, the invention discloses a method for reducing bioactivity in a process stream. The method comprises the step of providing the composition for the process stream. Through the optimized mixing ratio of the halogen and the stabilizing agent and mixing ratio of the ammonium salt and the sulfamic acid or sulfamate, the effect of the composition as a biocide is improved and adverse effects on other chemicals in the water flow are avoided.