66 results about "Bromate salt" patented technology

Compositions and methods are given for delayed breaking of viscoelastic surfactant gels inside formation pores, particularly for use in hydraulic fracturing. Breaking inside formation pores is accomplished without mechanical intervention or use of a second fluid. Bromate oxidizing agents are used along with selected breaking activators for the bromate breaking compounds. Useful bromate breaking activators include acid-generating breaking activators, oxidizing sulfur containing breaking activators, and reducing agent breaking activators.

A high-glossiness flame-retardant polypropylene composite comprises, by weight, from 45 to 95 parts of polypropylene, from 5 to 15 parts of flame-retardant agent, from 0 to 40 parts of flame retardant synergist, from 5 to 10 parts of compatilizer, from 0.5 to 3.0 parts of nucleating agent, from 0.2 to 1.0 part of lubricant, from 0.2 to 0.4 part of coupling agent and from 0.1 to 0.5 part of antioxidant. A flame-retardant system composed of magnesium hydroxide and melamine bromated is compounded with the polypropylene to endow the polypropylene composite with excellent flame-retardant performance, and polypropylene graft compound is added to improve compatibility of the flame-retardant agent with the polypropylene so as to further improve the flame retardancy. The high-glossiness flame-retardant polypropylene composite belongs to low-halogen flame-retardant polypropylene, contains little halogen flame-retardant components, is low in smoke generating quantity and toxicity, has the advantages of high glossiness, free of precipitation, high glow wire, low smoke density, high rigidity, surface hardness and heat resistance, and the like, and is widely applicable to fields of switch panels, sanitary wares, home appliance casings and the like.

The invention relates to a detection method for trace forbidden or restricted iodate and bromate in a cosmetic, and aims to provide the method which has the characteristics of high specificity, high anti-interference capacity and high accuracy. According to the technical scheme, the ion chromatography method for detecting iodate and bromate in the cosmetic comprises the following steps of: (1) preparing a sample: weighing a certain amount of cosmetic and placing in a centrifuge tube, and adding ultra-pure water to keep constant volume for later use; or adding the ultra-pure water and then ultrasonically oscillating, then loading on a centrifuge for centrifugal separation, taking supernatant and keeping constant volume for later use by using the ultra-pure water; or adding a certain amount of methylene dichloride, uniformly mixing through vortex, adding the ultra-pure water, ultrasonically oscillating, then loading on a centrifuge for centrifugal separation, taking the supernatant and keeping constant volume for later use by using the ultra-pure water; (2) enriching and purifying: taking the supernatant and collecting eluent through a water-phase filter membrane and an RP (Reversed Phase) column; and (3) loading on a machine for detection: taking the eluent and inputting into an ion chromatograph equipped with a post-column derivation device and an ultraviolet detector for detection.

The invention relates to a preparation method of a homogeneous cross-linked-structure alkyl side chain-type polyether sulphone anion exchange membrane. The preparation method comprises the following steps: step 1, performing a reaction on 3-bromopropylamine-methylimidazole bromate (I) and x-chloro-1-alkanol (II) so as to generate an x-dihydroxy-alkyl-chain side-chain imidazolium salt (III); step 2, performing a reaction on the compound (III) so as to prepare an x-dichloro-alkyl-chain side-chain imidazolium salt (IV); step 3, dissolving amino-containing polyether sulphone (V), the x-dichloro-alkyl-chain side-chain imidazolium salt (IV) and 1-bromo-3-methylimidazolium salt-alkyl chain (VI) in an organic solvent, and carrying out still standing for defoaming so as to obtain a membrane castingsolution; and step 4, coating a clean glass plate with the membrane casting solution obtained in the step 3, carrying out an in-situ reaction, and performing vacuum drying so as to obtain the homogeneous cross-linked-structure alkyl side chain-type polyether sulphone anion exchange membrane. The prepared anion exchange membrane has the characteristics of a low swelling rate, good structural stability and high monovalent-multivalent permeation selectivity.

The invention relates to the field of water treatment, in particular to modified activated carbon, a preparation method thereof and a method for removing bromate in water. The method comprises the following steps: reacting the epoxidized quaternary ammonium salt solution with activated carbon to prepare the modified activated carbon; mixing the modified activated carbon with an aqueous solution containing bromate, and adsorbing to remove bromate. According to the method, the epoxidized quaternary ammonium salt is adopted to modify activated carbon, so that epoxidized functional groups and oxygen-containing functional groups on the surface of the activated carbon are subjected to a cationization reaction, quaternary ammonium salt functional groups and activated carbon chemical bonds are combined, the connection strength is improved, and the activated carbon is not prone to falling off in the water treatment process. After the modified activated carbon is in contact with bromate ions inwater, on one hand, nitrogen-containing functional groups with positive charges in quaternary ammonium salt have a strong electrostatic adsorption effect on bromate with negative charges; and on theother hand, alkyl long chains in the quaternary ammonium salt have strong adsorption attraction on the surface of the modified activated carbon, so that the removal effect on bromate is greatly improved under the dual effects.

The invention provides a synthetic method of dopamine hydrochloride, and belongs to the field of drug synthesis. The preparation method comprises the following steps: taking 3,4-dimethoxyphenylethylamine as an initial raw material, firstly reacting with an acid to form a salt, re-crystallizing and refining to obtain 3,4-dimethoxyphenylethylamine salt, reacting with hydrobromic acid to remove methyl to generate dopamine hydrobromide, and finally reacting with hydrochloric acid to form a salt so as to obtain dopamine hydrochloride. The preparation method provided by the invention has the advantages of cheap and easily available initial raw materials, simple process, no high-temperature and high-pressure hydrogenation step, low cost, high purity and high yield, and is suitable for industrialproduction.

An antifungus compound 1-(1H-1,2,4-triazole-1-yl)-2-(2,4- difluorophenyl)-3-[N-methyl-N-(4-substituted amino) benzylamino]-2-propanol and its salts, and its preparing process are disclosed. Its advantages are high curative effect, low poison and broad spectrum.

The invention discloses a mesoporous gamma-Fe-Ti-Al2O3 catalyst. The catalyst is prepared from the following raw materials of aluminum isopropoxide C6H21AlO3, glucose C6H12O6.H2O, Fe(NO3)3.9H2O, and tetrabutyl titanate (TBOT) aqueous solution. The invention further discloses a preparation method and application of the mesoporous gamma-Fe-Ti-Al2O3 catalyst. The novel mesoporous gamma-Fe-Ti-Al2O3 catalyst can be applied to catalytic ozonation of ibuprofen and blocking of bromate generation, and has remarkable effect.

The invention discloses application of 2-arylmorpholine as shown in the chemical structural formula I or salt thereof serving as an insecticide. The formula I is shown in the specification, wherein, R<2> is chosen from H, OH or OR<1>, and R<1> is chosen from C1-C2 alkyl and C3-C4 linear alkyl or branched alkyl; R<3> is chosen from H, C1-C2 alkyl and C3-C4 linear alkyl or branched alkyl; R<4> is chosen from H, C1-C2 alkyl, C3-C4 linear alkyl or branched alkyl, ethoxyl and benzyl; R<5> is chosen from H, C1-C2 alkyl, C3-C4 linear alkyl or branched alkyl, phenyl or substituted phenyl; Ar is chosen from phenyl, substituted phenyl or 6-methoxy-2-naphthyl; and the salt of the 2-arylmorpholine is chosen from hydrochloride, hydrobromate, sulphate, nitrate or phosphate.

The invention discloses a preparation method of a hot dip galvanizing layer vanadate conversion film. The preparation method comprises the steps: (1) mixing tetrabutyl ammonium fluoride and caprolactam, heating the mixture until the solid is melted completely, then adding water into the mixture, and uniformly mixing the mixture to obtain an ionic liquid aqueous solution; (2) uniformly mixing sodium metavanadate, sodium metaborate, 3-bromopropylamine hydrobromide, N,N-bis(octyhminoethyl)hydrochloride, the ionic liquid aqueous solution and the water, and adjusting the pH value to 2.0-3.0 by using a hydrochloric acid solution to obtain a conversion solution; and (3) degreasing, washing and drying a hot dip galvanizing plate, spraying ammonia water on the surface of the hot dip galvanizing plate, and after reacting for 5-10 min, immersing the hot dip galvanizing plate in the conversion solution, and washing and drying the hot dip galvanizing plate after conversion treatment to obtain the finished product. The prepared vanadate conversion film is compact and flat in surface, and excellent in quality and corrosion resistance.

The invention discloses a synthesis method of 2, 4, 6-tribromophenol, which comprises the following steps: dissolving phenol and metal bromide in water to obtain a mixed solution of phenol and metal bromide, and recording the mixed solution as a first mixed solution; dropwise adding a bromate solution and hydrochloric acid into the first mixed solution for reaction; and after the reaction is finished, adding sodium sulfite into the reaction liquid until the light brown color in the reaction liquid completely disappears, filtering, washing and drying to obtain the 2, 4, 6-tribromophenol. According to the synthesis method disclosed by the invention, the bromide salt is used as a bromine source, so that available resources are fully utilized, and the use of an organic solvent is avoided; after the reaction is finished, a crude product is separated out in a water phase, and a product with enough purity is obtained after simple filtering treatment; according to the process method, the production cost is greatly reduced, meanwhile, potential safety hazards in transportation and production are reduced, and the working environment is improved.

The invention belongs to the technical field of preparation of drug intermediates, and particularly relates to a preparation method of o-carboxybenzaldehyde. The method comprises the following steps:a crude o-carboxybenzaldehyde product preparation step: taking phthalide as a raw material, carrying out bromination reaction under the action of a bromination reagent and an initiator to obtain 3-bromophthalide, and then carrying out hydrolysis reaction to obtain a crude o-carboxybenzaldehyde product; salifying and purifying, namely adjusting the solution of the o-carboxybenzaldehyde crude product to be weakly alkaline by using inorganic base, filtering to obtain a filter cake, dissolving the filter cake, adjusting the pH value to be acidic, cooling, crystallizing and filtering to obtain o-carboxybenzaldehyde; wherein the bromination reagent is tetrabromo cyclic ketone, dibromohydantoin, NBS, pyridine hydrobromide over-bromide, over-bromo quaternary ammonium salt or quaternary phosphoniumsalt. The preparation method of o-carboxybenzaldehyde provided by the invention is low in pollution, mild in condition, high in safety, high in product purity and yield, and suitable for industrial production.

The present invention relates to the technical field of drinking water, more specifically, to a method for producing fresh and healthy drinking water, comprising: delivering the source water to a water treatment workshop; Water tank; ultraviolet rays are used for the first sterilization; the effluent after the first sterilized treatment is filtered for the second time to remove the second solid particles; it flows into the antibacterial membrane system for the third filtration; the effluent treated by the third filtration flows into the middle Water tank; the second sterilization is carried out by ultraviolet light; the effluent after the second sterilizing treatment is sterilized for the third time by means of cold and hot exchange; the effluent water after the third sterilization treatment flows into the finished water tank and waits for filling. The source water of the present invention is transported to the workshop through a closed pipeline without aeration process and ozone sterilization process, effectively removes particles and microorganisms in the source water, strictly controls bromate and nitrite in the effluent, and obtains fresh and healthy product effluent.

The invention discloses a preparation method of 3, 7-diketocholanic acid with low cost and high yield, which is characterized by comprising the following steps: adding chenodeoxycholic acid into a mixed solution of an organic solvent and water, and performing stirring to dissolve; adding bromide and acid, and performing stirring and dissolving; adding bromate for reaction; adding a terminating agent, and performing stirring to terminate the reaction; adding water to crystallize the product; and carrying out liquid separation, washing the solid product with water for multiple times, performingwashing with an organic solution, performing centrifuging or filtering, and finally drying the solid product to obtain the 3, 7-diketocholanic acid. The method has the advantages of cheap selected reagents, simple operation, high process reproducibility, simple post-treatment, high product purity and the high yield, provides a related substance impurity reference substance for quality control of chemicals in China, and realizes zero breakthrough.

The invention discloses a method for preparing 3-methyl-5-bromomethylpyridine bromate by using an electrochemical micro-channel reaction device. The method comprises the following steps: dissolving 3, 5-dimethylpyridine, bromine salt and electrolyte in a mixed solvent to obtain a homogeneous solution, pumping the homogeneous solution into a micro-channel reaction device provided with an electrode for electrolytic reaction to obtain a finished product. Compared with the prior art, the method has the advantages that the generation of byproducts is greatly reduced, and the yield of the 3-methyl-5-bromomethylpyridine is remarkably improved. Meanwhile, raw material selection is more environmentally friendly and economical, and industrial large-scale production is more facilitated.