186 results about "Bromide salt" patented technology

This invention describes a method for stabilizing bromine biocides in water. A water-soluble bromide salt and a sulfamate source are added to a body of water, and then an oxidant is added to the body of water to form the biocidal bromine species.

The invention discloses a preparation method for an ionic-liquid-modified carbon quantum dot. The preparation method comprises dissolving citric acid and aminoimidazolium bromide in ultrapure water, and dewatering to obtain a gelatinoids, then stirring and refluxing, adding ultrapure water for once-more dispersing after cooling, and then dialyzing for 2-3 days, and drying to obtain a carbon quantum dot of which the anion is bromide ion; dissolving the carbon quantum dot in ultrapure water, introducing a specific anion (such as N(CF3SO2)<2->) and an oil phase (such as ethyl acetate) into the carbon-quantum-dot-dissolved ultrapure water, so as to enable the carbon quantum dot to have anion exchange and be transferred from the ultrapure water phase to the oil phase, and separating the oil phase, so as to obtain the carbon quantum dot of which the anion is N(CF3SO2)<2->; and continuing introducing other anions(such as Cl<->), so as to enable the carbon quantum dot to be transferred into the ultrapure water phase from the oil phase. Through once or multitime phase transfer and separation of the oil phase and the ultrapure water phase, a series of high-purity carbon quantum dots which contain different anions and are adjustable in dissolvability and fluorescence property are obtained.

Compositions, and processes utilizing such compositions, are provided for reducing mercury emissions from combustion gases. Such compositions comprise a wood- derived or coconut sheil-derived activated carbon and/or a bromide-containing in-organic salt such as an ammonium bromide or cafcium bromide salt.

The present invention relates to an electrochemistry synthetic method of tetributyl tribromide of ammonium and belongs to the field of chemical formulation preparing technology. Sadi synthetic method in accordance with the present invention is as follow: dissolving tetrabutyl ammonium bromide in a aqueous solution of bromium salts such as ammonium bromide, potassium bromide or sodium bromide, magnetic-stirring it until reaching a entire solubilization, and then restirring it after adding organic solvent such as methylene dichloride or acetonitrile therein; putting the solution into an electrolytic tank of non-diaphragm type, selecting platinum meshwork as cathode and anode, inputting a constant electrical current for electroanalysis; electrolyzing for 3 hours under normal temperature and magnetic stirring to obtain tetributyl tribromide of ammonium in oil phase finally; washing the oil phase with distilled water, evaporating the organic solvent off and exposing it to air for a period of time, after the product solidifies, washing it with water, performing a recrystallization with methanol to obtain high-purity tetributyl tribromide of ammonium solid.

A method for treating a polymetallic sulfide ore containing gold and/or silver, and further containing base metals selected from the group consisting of iron, aluminum, chromium, titanium, copper, zinc, lead, nickel, cobalt, mercury, tin, and mixtures thereof, is disclosed. The method comprises the steps of grinding the polymetallic sulfide ore to produce granules, oxidizing the granules to produce oxidized granules, and chloride leaching the granules using a brine solution including dissolved halogens, as well as chloride and bromide salts.

The invention aims at providing a method for preparing colorless imidazole ion liquid. The colorless imidazole ion liquid is 1-alkyl-3-methyl imidazole bromine, and a general formula of the ion liquid is as above. The preparation method uses water as solvent, thereby reducing the use of organic solvent and achieving the goal of being friendly to the environment. Under the protection of nitrogen, a reaction product is dissolved in water to remove brominated alkane which does not react at an underlayer for recycling; and the water in the reaction product and the residual brominated alkane are removed by decompressing and distilling to obtain the colorless 1-alkyl-3-methyl imidazole bromine ion liquid. A reaction mixture is colorless during the whole reaction process, the obtained product of the imidazole ion liquid is also colorless, and subsequent decolorization and purification treatment is not required, thereby greatly reducing the nondeterminacy and the limit of the ion liquid in the application.

A bromine generator apparatus is provided for producing bromine from a bromide salt. The apparatus includes an electrical power unit, a housing, and first and second electrodes. The housing has inlet and outlet openings constructed and arranged for permitting the passage of water containing a bromide salt into the housing and water containing bromine out of the housing, respectively. The first and second electrodes electrically are connectable to the electrical power unit and have first and second contact regions, respectively, in the housing for contacting water passing through the housing and converting the bromine salt to the corresponding free bromine. The first and/or second contact regions are made of non-woven extruded graphite.

The invention discloses a cellulose nanofibril aerogel loaded with a photocatalyst and a preparation method thereof. The preparation method comprises the steps of: (1) dissolving bismuth nitrate in a cellulose nanofibril suspension liquid, and mixing the substances evenly to obtain a mixed solution; (2) drying the mixed solution obtained in step (1) to obtain cellulose nanofibril aerogel loaded with bismuth ions; (3) dissolving a soluble bromide salt and a soluble chloride salt in deionized water, stirring the substances fully to obtain a halide salt solution; and (4) impregnating the cellulose nanofibril aerogel loaded with bismuth ions obtained in step (2) in the halide salt solution obtained in step (3), then taking the cellulose nanofibril aerogel out for drying, and conducting calcinations, thus obtaining the cellulose nanofibril aerogel loaded with the photocatalyst. The aerogel can achieve catalytic degradation of organic matters under visible light, also has high light utilization rate and good photocatalytic effect, and the nano-photocatalytic material is easy for recycling.

The invention discloses a preparation method of a bromo-nitroaniline dye stuff intermediate, which comprises the following steps of: adding inorganic acid aqueous solution into bromide aqueous solution; stirring the mixture; adding a nitroaniline compound into the mixture; raising the temperature of the mixture to be between 35 and 55 DEG C; pulping and stirring the mixture; dropping chlorate aqueous solution into the mixture, wherein the dropping time is more than 2 hours; stirring the mixture, and raising the temperature of the mixture to between 65 and 75 DEG C; filtering the mixture after reaction; washing a filter cake until the pH value is 5 to 8; and drying the filter cake to obtain the bromo-nitroaniline dye stuff intermediate. The product obtained by adopting the method has high quality and yield, the production cost is greatly reduced, the process is simple, and simultaneously, the pollution, caused by waste gases containing hydrogen bromide and waste water containing bromide salts, to the environment is greatly cut down.

The invention discloses an alkylimidazole ethylenediaminetetraacetic acid iron (III) water-soluble ionic liquid and a synthetic method thereof. The technical scheme is characterized in that: an alkylimidazole chlorine salt or bromine salt, KOH, ferric chloride hexahydrate and ethylenediaminetetraacetic acid are taken as raw materials for synthesis of alkylimidazole ethylenediaminetetraacetic acid iron (III). Compared with conventional halogen-containing iron-based magnetic ionic liquid, alkylimidazole ethylenediaminetetraacetic acid iron (III) has the characteristics of adjustable acid-base property, high water solubility and the like. The water solution of alkylimidazole ethylenediaminetetraacetic acid iron (III) not only has relatively high oxidation-reduction reversibility, but also has lower surface tension and higher iron (III) concentration compared with a water solution of Fe-EDTA.

The invention provides a method for recovering bromine from bromine-containing wastewater in production of brominated aniline, and the method comprises the following steps: a primary extraction step:absorbing bromide ions in the bromine-containing wastewater by using an organic extractant to obtain a primary extraction solution; a separation step: separating the primary extraction liquid to obtain a primary extraction phase and primary raffinate; and a reverse extraction step: absorbing the bromide ions in the primary extraction phase by using an alkaline substance to obtain a regenerated extracting agent and a bromide salt solution. The method is simple in technological process, free of dangerous links such as high temperature and high pressure in the whole process, free of toxic and harmful gases and new three wastes and environmentally friendly, and the bromide ions in the wastewater can be effectively recycled; furthermore, the method provided by the invention has low requirementson wastewater, corrosion resistance and automation of equipment, so that the operation cost is relatively low, and the method is suitable for industrial treatment.

The invention relates to a magnesium ion doped carbon quantum dot as well as preparation and application methods thereof, and is characterized in that 1) under an oil bath condition, magnesium gluconate and 1-aminopropyl-3-methylimidazolium bromide are subjected to melt mixing according to a molar ratio of 1:(1-4), and the mixture is stirred and mixed uniformly to form gel; 2) under the protectionof nitrogen and magnetic stirring, the gel is pyrolyzed at 180-240 DEG C for 1-6 hours, and a product is cooled; 3) the product then is dissolved in ultrapure water to obtain a brownish black dispersion liquid with the ratio of the mass of the product to the volume of water being 1:(10-50), and the dispersion liquid is centrifuged to obtain an upper-layer dispersion liquid containing carbon quantum dots; 4) the upper dispersion liquid is transferred into a dialysis bag then is dialyzed in ultrapure water for 3-5 days; and 5) freeze drying and forced air drying are carried out on the dispersion liquid. The preparation method has the advantages that the magnesium ion doped carbon quantum dots are small in particle size, uniform in size distribution, simple in preparation process, easy to operate and suitable for industrial production; when the magnesium ion doped carbon quantum dots are added into the water-based lubricating base fluid, the average friction coefficient is reduced by 60.6%; and the wear volume is reduced by 81.8%.

The invention discloses a method for synthesizing triphenyl-phosphonium bromide salt and an intermediate halomethyl benzyl ether compound thereof. The method comprises the following steps that at a temperature of between 10 DEG C below zero and 10 DEG C, hydrogen chloride or hydrogen bromide and benzyl alcohol compound react with paraform to synthesize the halomethyl benzyl ether compound, and then the halomethyl benzyl ether compound reacts with triphenyl-phosphonium bromide in a solvent to obtain the triphenyl-phosphonium bromide salt compound. The method solves the problems that the purity of the halomethyl benzyl ether compound prepared at a temperature of between 20 DEG C and 25 DEG C by the prior method is low, and in the purification process, the intermediate is decomposed, which results in the low yield of the triphenyl-phosphonium bromide salt at the end. The triphenyl-phosphonium bromide salt and the intermediate halomethyl benzyl ether compound which are prepared by the method have the advantages of higher yield and purity without purification, simple process, convenient operation and higher industrial application value, and are easy to be applied to industrial scale production.

A urea removal capability is increased in a water treatment method of introducing raw water containing organic substances, specially, urea to a reaction tank, adding water-soluble bromide salt and an oxidizing agent to perform an oxidation treatment on the urea, subsequently, performing a bio-treatment by a bio-treatment means. According to the water treatment method, TOC, particularly, urea in the raw water can be highly decomposed.

A process is provided for converting an alkane to an oxygenated product by passing an alkane gas over a first fixed bed containing a higher valence bromide salt to produce an alkyl bromide, a hydrobromic acid, and a lower valence bromide salt. The alkyl bromide and hydrobromic acid are conveyed as a gas to a second fixed bed containing a metal oxide and are passed over the second fixed bed to produce the first bromide salt and the oxygenated product. The metal oxide in the second fixed bed is regenerated by passing oxygen over the second fixed bed producing the metal oxide and bromine. The bromine is conveyed as a gas from the second fixed bed to the first fixed bed. The first bromide salt of the first fixed bed is regenerated by passing the bromine over the first fixed bed producing the first bromide salt.

The invention relates to a preparation method of an ionic liquid modified nitrogen-sulfur co-doped graphene oxide composite material. The method comprises the following steps: preparing a dispersion liquid from graphene oxide and deionized water, then mixing 1-aminopropyl-3-alkyl imidazole bromide salt, potassium hydroxide and the graphene oxide dispersion liquid, carrying out a reaction process to obtain a 1-aminopropyl-3-alkyl imidazole bromide salt and graphene oxide composite product, then mixing the product with thiourea, adding a solvent to dissolve the mixture, and reacting at 160-200 DEG C to obtain the composite material. The composite material is loaded on a cathode electrode to serve as a catalyst. The material obtained by the invention has good oxygen reduction catalytic activity and a wide application prospect.

The invention discloses a preparation method of a porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst is characterized by comprising the following steps: dissolving wool by using 1-allyl-3-methylimidazolium bromide and adding polyvinyl alcohol and nano ferroferric oxide to obtain porous magnetic composite wool particles; preparing bulking rhodium-doped BiOBr powder by using a combustion method; and then adding the following components in a reactor in percentages by mass: 72-78% of liquid paraffin and 4-8% of sorbitan fatty acid ester, adding 2-5% of rhodium-doped BiOBr powder while stirring violently, adding 12-18% of porous magnetic composite wool particles, stirringand reacting, carrying out solid-liquid separation, washing with anhydrous ethanol, and drying to obtain the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst. The preparation method of the porous magnetic composite wool-loaded rhodium-doped BiOBr photocatalyst has the characteristics that the preparation method is simple, the stability of the catalyst is good, and the catalyst can be degraded and is environmentally friendly and the like; and the catalyst is easy to recycle, reaction conditions are gentle, the catalytic activity is high, the use amount is small and the like.