99 results about "Tribromide" patented technology

A thermocured, heat conductive and heat radiating paint for an LED lamp is prepared by the following raw materials by weight: 40-45 parts of polyacrylic resin, 5-8 parts of polyurethane resin, 4-6 parts of polyacrylamide, 6-8 parts of isophorone diamine IPDA, 20-24 parts of xylene, 2-3 parts of silane coupling agent KH550, 1-2 parts of aluminium powder, 8-12 parts of ethyl acetate, 2-4 parts of benzyltrimethylammonium tribromide, 10-12 parts of aluminium nitride, 2-3 parts of beryllia, and 4-5 parts of film forming auxiliary agent. Aluminium nitride powder, the beryllia and the aluminium powder are added, so as that the paint has high heat conduction rate and good heat radiation effect, and can be long-term used under 200 DEG C without change of mechanical property; polyacrylic resin is used, so as that the paint has advantages of excellent fullness, glossiness, hardness, solvent resistance and weatherability, without color change and brightness reversion when high temperature baked; and the paint has advantages of large adhesion stress, not-easy shedding, aging resistance and long usage life.

The present invention discloses a preparation method of carbonate with high optical activity, a main catalyst that is used in the method, and a preparation method of the main catalyst. In the method, racemic epoxy alkane and carbon dioxide have catalytic cycloaddition reaction under chiral double-component catalysts to prepare the optically active cyclic carbonate. The main catalyst is the metal complex of double-chiral Schiff base with coordinated four teeth; the auxiliary catalyst is four substituted tribromide or quaternary ammonium 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.

The invention relates to a synthetic method of bromotetraacetylglucose, bromotetraacetylglucose and use thereof. The invention comprises the steps of taking glucose as raw materials, carrying out acetylation reaction by acetyl oxide as an acylating agent, then carrying out bromination reaction by phosphorous tribromide and hydrobromic acid as a brominating agent, and then carrying out recrystallization by diethyl, and at last obtaining bromotetraacetylglucose. The invention has the advantages of simple and efficient method, high yield and high purity reaching above 98.9%.

The invention discloses a bituminous paint which comprises the following raw materials in parts by mass: 1-3 parts of potassium chloride, 2-4 parts of metanitrophenol, 1-2 parts of anthraquinone, 2-5 parts of sodium dodecyl benzene sulfonate, 2-6 parts of tetraethylammonium chloride, 2-5 parts of hexadecyltributylphosphorus tribromide, 1-3 parts of 4-bromo-1-butanol, 3-5 parts of diethylaminoethanol hexanoate and 2-5 parts of praseodymium trifluoroacetylacetone. The bituminous paint disclosed by the invention has the advantages of favorable heat resistance, favorable adhesive force, favorable weather resistance, short drying time and obvious anticorrosion effect, and is convenient, safe and environment-friendly to use in construction.

The invention discloses a method for catalyzing and synthesizing adamantane which is generated by bridge tetrahydro Dicyclopentadiene in two steps of catalytic isomerization; adamantane is generated by bridge tetrahydro Dicyclopentadiene as raw material and any of aluminium choride, aluminium tribromide, or ferric trichloride as a catalyst under a normal pressure, a certain temperature, and a certain reaction time. The method is characterized in that the reaction is accomplished in two steps; in the first step, any of methanol, ethanol, normal propyl alcohol, isopropanol, methyl ethyl ketone, acetone, acetic acid, halogenated hydrocarbon, and tetrahydrofuran is used as solvent; in the second step, a certain amount of main catalyst is added, and any of sodium carbonate, sodium chloride or sodium bicarbonate is added as a cocatalyst, thus generating the adamantane under a certain reaction temperature. The method is simple and convenient; the operation is convenient; the yield coefficient is high; and the cost is low. Through a suitably chosen catalyst system, the purity of the adamantane obtained with the method is higher than 99 percent; and the yield coefficient is higher than 60 percent.

The invention discloses a synthetic method of 5-bromo-2-chlorobenzoic acid. The method comprises the following steps of by taking salicylic acid as a starting material, performing bromination reactionto obtain 2-hydroxyl-5-bromo-benzoic acid, and then performing chlorination reaction to obtain the 5-bromo-2-chlorobenzoic acid, wherein a bromination system adopted by the bromination reaction is tetrabutyl ammonium bromide/oxygen/sodium metavanadate, a catalyst is aluminium tribromide, and a solvent is 1,4-dioxane; and a chlorinating agent is carbon tetrachloride, and a catalyst is molybdenum hexacarbonyl. The method provided by the invention adopts the cheap salicylic acid which is wide in source as the starting material and prepares the 5-bromo-2-chlorobenzoic acid through two-step reaction of bromination and chlorination, is novel in synthetic route, relatively low in production cost, relatively small in environmental pollution and very suitable for industrial mass production. According to the method, through the bromination reaction and the chlorination reaction, by selecting proper reagents, relatively high reaction yield and product purity can be obtained.

A water-insoluble polymeric oxidizing medium is contemplated that has a plurality of polymerized N-pyridinium vinylbenzyl triiodide or tribromide moieties whose pyridinium rings bear two substituents, R¹ and R², that are independently a hydrido or a C₁-C₄ alkyl group, and correspond in structure to the formula

A process for preparing aseptic water and an apparatus useful for carrying out that process, both of which utilize a contemplated polymeric oxidizing medium are disclosed, as are processes for oxidizing trivalent arsenic or antimony to pentavalent arsenic or antimony and for removing arsenic from water. Alumina particles containing meta-periodate, iron or manganese are also disclosed that can be used to sorb pentavalent arsenic and antimony, as well as cobalt and mercury.

A disclosed preparation method for bromopentafluorobenzene comprises: adding a certain amount of pentafluorophenol and phosphorous tribromide into a 250 mL reaction flask, heating to 50-60 DEG C, then adding a certain amount of a catalyst, continuing to heat to 60-90 DEG C for reacting for 1-2 h; and after the reaction is finished, cooling to 50-60 DEG C and keeping warm for 30-60 min, then putting the reaction flask into an ice bath to cool to room temperature, filtering, distillating the filtrate, and introducing into a condenser tube for condensing, so as to obtain bromopentafluorobenzene. The preparation method for bromopentafluorobenzene is easily available in raw materials, mild in reaction conditions, short in synthesis technological flow and simple in operation, the obtained target product has relatively high purity and yield, the product purity can reach 97%, and the product yield can reach 72%.

The invention relates to the technical field of chemical synthesis. In the method, thioether is oxidized in the air at room temperature so as to synthesize a crude sulfoxide compound on the basis of utilizing ethanol as a solvent and pyridine tribromide and nitrate as catalysts; or the thioether is oxidized in the air at room temperature so as to synthesize the crude sulfoxide compound on the basis of utilizing the ethanol as the solvent and liquid bromine and nitrate as the catalysts. The method is simple to operate and environment-friendly, and the product polluting environment is not generated by using the method, thereby overcoming the defects of thioether selective oxidation reaction; and the method has the characteristics of no transition metal catalyst, mild reaction conditions, less catalyst dosage, high oxidation selectivity, high yield and the like.

Iodogallium phthalocyanine and bromogallium phthalocyanine having novel crystalline forms characterized by X-ray diffraction patterns according to CuKalpha characteristic X-ray diffraction method and exhibiting excellent zirconium phthalocyanine can be obtained through appropriate selection of a reaction solvent, followed by milling or stirring in an appropriate solvent. For example, alpha-chloronaphthalene is a suitable solvent for reaction between phthalonitrile and gallium triiodide or tribromide to provide iodogallium phthalocyanine or bromogallium phthalocyanine. Reaction of chlorogallium phthalocyanine or hydroxygallium phthalocyanine with hydroiodic (or hydrobromic) acid is also effective for providing a novel crystal form of iodo-(or bromo-)gallium phthalocyanine. Zirconium phthalocyanine exhibiting good electrophotographic performances can be obtained through a similar process.

The present invention provides a preparation method of Sugammadex sodium and an intermediate thereof. The method comprises a bromination reaction of a compound of a formula (I) with a brominating reagent, wherein the brominating agent is selected from pyridinium tribromide. The method has the advantages of simple process, high yield, high purity and low pollution, and is suitable for industrial production.

The invention relates to the field of drugs, in particular to a macamides compound and a synthetic method and application thereof. The synthetic method of macamides comprises the steps that linoleic acid and an oxidizing agent are subjected to catalytic oxidation through pyridine derivatives to obtain a macaenes mixture; the macaenes mixture and benzylamine or benzylamine derivatives are subjected to amidation and then separated through preparative chromatography, wherein the oxidizing agent is one of 2,2,6,6-tempol-nitrogen-oxide, pyridinium tribromide, 2-Iodoxybenzoic acid; the benzylamine derivatives are 3-trimethoprim or 3,4-dimethoxybenzamine. Linoleic acid is adopted as a starting reactant to be synthesized, and compared with the prior art that mecamide is extracted from plant maca, the needed raw material is low in cost and easy to obtain; in addition, in the synthesis preparation process, operation is easy, few by-products are produced, the needed reagents and solvents are small in toxicity and easy to obtain, and the novel path is provided for preparing a large number of macamides monomeric compounds.

The invention discloses a high-toughness automobile sealing strip, which is prepared from the following raw materials in parts by weight: 9 to 15 parts of neoprene, 3 to 6 parts of a rare earth modifier, 4 to 9 parts of white carbon black, 3 to 10 parts of chlorinated paraffin, 1 to 5 parts of an accelerator, 6 to 11 parts of nitrile-butadiene rubber, 3 to 8 parts of sulfur powder, 9 to 14 parts of benzyl trimethyl ammonium tribromide, 6 to 9 parts of diethylene glycol monobutyl ether, 2 to 7 parts of tetrahydrofuran, 6 to 11 parts of 3-propargyl chloride, 3.5 to 8 parts of zinc stearate, 6 to 10 parts of poly-4-methyl-1-pentene, 7 to 10 parts of thermoplastic resin, 3 to 9 parts of dimethylsilicone fluid, 6 to 12 parts of butadiene styrene rubber and 2 to 9 parts of an accelerator. The automobile sealing strip has the beneficial effects of strong strength, high toughness, capability of well achieving a sealing effect and good soundproof and waterproof effects.

The invention discloses a synthetic method for halogenated pyridine 3, 5-dibromo-4-iodopyridine. 3, 4, 5-pyridinium tribromide, an alkyl silicon reagent and iodized salt are used as starting materials, and a halogen exchange reaction is performed to generate 3, 5-dibromo-4-iodopyridine in one step. Compared with synthetic methods for the 3, 5-dibromo-4-iodopyridine in prior art, the synthetic method has the advantages that the yield is high, the reaction selectivity is good, the purification is easy, and the like.

The invention discloses a preparation method of a flame-retardant carpet. The preparation method comprises the following operation steps: uniformly spraying modifying liquid to a carpet, putting the carpet into a ventilating place so that the modifying liquid is dried up naturally in the air; dissolving acrylic resin into a toluene solution, uniformly stirring, adding aniline and ammonium persulfate to generate polymerization reaction at the room temperature for 2-3 hours, pouring out upper-layer liquid so as to obtain a polyaniline/acrylic resin composite matrix, adding ammonium polyphosphate, tributyl borate, zinc borate, aluminum tribromide, isopropyl isostearate, a thickening agent and a flatting agent into the composite matrix, and uniformly mixing, so as to obtain a flame-retardant coating; and spraying the flame-retardant coating to the carpet in a roll coating manner by virtue of a coating machine. The preparation method of the flame-retardant carpet is simple in operation and environment-friendly, and the prepared carpet is good in flame retardance and good in softness.

Butadiene polymers are brominated using tetraethylammonium tribromide as the brominating agent. The bromination is performed in a solvent for the starting polymer and for the tetraethylammonium bromide that is formed as a reaction byproduct. The process proceeds easily under mild conditions. In some cases, a solution of the brominated polymer and the tetraethylammonium monobromide is produced; this solution separates into a layer that contains the brominated polymer and another layer that contains most or all of the tetraethylammonium monobromide salt. In other cases, the brominated polymer precipitates from the reaction mixture and is separated from the tetraethylammonium monobromide salt in that manner. This process therefore permits the tetraethylammonium monobromide reaction by-product to be separated easily from the brominated product, and allows aqueous washing steps to be reduced or eliminated.

The invention discloses a preparation method of a rosuvastatin intermediate, and belongs to the technical field of intermediates. The method comprises the following steps: carrying out a reduction reaction on Z6, KBH4 and a Lewis acid in an organic solvent at 60-100 DEG C to obtain Z7, wherein a mass ratio of the Z6 to KBH4 to the Lewis acid is (105-130):(50-60):(50-70); carrying out a reaction on the Z7 and phosphorous tribromide in an organic solvent at 10-50 DEG C to obtain Z8.1, wherein a mass ratio of the Z7 to phosphorous tribromide is 1:(1-1.3), and the organic solvent is C1-C3 halogenated hydrocarbon; and carrying out a reaction on the Z8.1 and ethyl diphenylphosphinite in an organic solvent at 40-100 DEG C to obtain Z9, wherein a mass ratio of the Z8.1 to ethyl diphenylphosphinite is (1.5-1.8):1. The method has the advantages of easily available raw materials, mild reaction conditions, easy realization of industrial production, high yield, and easiness in separation of the solvents.

The invention provides a D, L-naproxen one-pot synthesis method which is characterized by including the preparation steps: (1) adding xylene into a reaction vessel, performing reaction with phenyl trimethyl ammonium tribromide and 6-methoxyl-2-propionyl naphthalene to obtain xylene solution; (2) heating the xylene solution to boil and remove water, cooling the xylene solution, adding neopentyl glycol and p-toluenesulfonic acid and then continuing reflux water distribution reaction; (3) adding zinc acetate or zinc oxide into last-step reaction liquid and performing heating reflux reaction; (4) adding sodium hydroxide or potassium hydroxide solution into residues obtained by drying by distillation and dissolution in the last step, performing hydrolysis and collecting water solution for stand-by application of next-step reaction; (5) adding Raney nickel into the water solution and performing hydrogenation reaction to obtain a product. Total yield reaches 73%, one-pot synthesis is performed in whole operation, a technology is simplified, and an industrial route is environmentally friendly.

The invention discloses a novel organic-inorganic hybrid nonlinear optical crystal 1-ethyl-3-methylimidazol lead tribromide and a growing method thereof. The nonlinear optical crystal has a chemical formula of (C6H11N2)PbBr3 and belongs to an orthorhombic crystal system, and the space group is P212121. The 1-ethyl-3-methylimidazol lead tribromide crystal is grown at room temperature by adopting a solution evaporation method, the permeation range is 0.35-2.2 mu m, the powder frequency-doubling performance of the crystal is equivalent to that of 4 times the amount of KDP (potassium dihydrogen phosphate), and the crystal has a phase-matching capability. Besides, the crystal can be used for the nonlinear optical field, and enriches the research content of nonlinear optical materials.

A volatile solid-source novel antimony precursor, Br2SbCH3, that may be utilized in semiconductor processing chambers for depositing antimony on a substrate by deposition methods, e.g., chemical vapor deposition, ion implantation, molecular beam epitaxy, diffusion and rapid thermal processing. The novel antimony compound of the invention is synthesized by combining tribromide antimony with trimethylantimony under heating conditions that form a Br2SbCH3 crystalline product.

The invention discloses a fluorocarbon coating layer for a solar cell backplane and a preparation method of the coating layer. The fluorocarbon coating layer for the solar cell backplane is prepared from the following constituents in parts by weight: 30-80 parts of europium trifluoroacetylacetone, 100-200 parts of fluorocarbon resin, 150-200 parts of sodium monofluorophosphate, 40-80 parts of calcium oxide, 80-150 parts of benzyl trimethyl ammonium tribromide, 60 to 100 parts of methyl tetrahydrofurfuryl acrylate, 40- 80 parts of polyisobutylene, 20-50 parts of silicate, 30-70 parts of a stabilizer, and 45 to 55 parts of a surfactant, and prepared by the following steps: uniformly mixing europium trifluoroacetylacetone, fluorocarbon resin, sodium monofluorophosphate, calcium oxide, methyl tetrahydrofurfuryl acrylate, polyisobutylene, silicate, the stabilizer and the surfactant, heating the mixture to 400-600 DEG C, extruding and pelletizing, adding benzyl trimethyl ammonium tribromide, uniformly mixing, and stretching to form film. The fluorocarbon coating layer disclosed by the invention can remarkably lower the coating pressure, so as to reduce the production cost.