68 results about "Bromate salt" patented technology

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 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 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.