69 results about "Bromate salt" patented technology

A method for extracting precious metals from a polymetallic ore, comprising a) generating hypochlorites from a salt brine; b) chlorination of the ore using hypochlorites under acidic conditions; c) filtering to collect a pregnant solution and treating the pregnant solution for collection of precious metals; d) filtering to separate the precious metals and a barren brine; e) purifying the barren brine; and f) recycling halogens from the purified brine in the form of hypohalites formed by electrolysis of the purified brine, and comprising hypochlorite and hypobromite; step b) further comprising scrubbing excess halogens using calcium hydroxide; treating the pregnant solution in step c) comprises reducing an oxydo reduction potential of the pregnant solution and using calcium hydroxide for neutralization; and step e) comprising increasing the pH of the barren brine by addition of calcium hydroxide.

The invention provides stabilized concentrated aqueous solutions of alkali hypobromites, as well as a process for the preparation of said stabilized concentrated solutions at low temperatures, comprising reacting a concentrated alkali hydroxide aqueous solution with bromine, adding to the non-stabilized reaction product an aqueous solution of a sulfamic compound to stabilize the hypobromite, and oxidizing bromide to produce additional hypobromite.

The invention relates to a hydrogen matrix biofilm reactor for removing bromate (BrO 3 ‑ ), belongs to the field of water purification technology. In the application of the hydrogen matrix biofilm reactor provided by the present invention in the removal of bromate in drinking water, the hydrogen matrix biofilm reactor includes a cylinder body, a return system, an inlet and outlet water piping system and a hydrogen supply system; the cylinder The center of the body is equipped with a hollow fiber membrane as the attachment carrier of the biofilm, and the two ends of the hollow fiber membrane are fixed at both ends of the cylinder; the hollow fiber membrane is connected to the hydrogen supply system, and hydrogen enters the hollow fiber membrane from the top of the reactor. , diffuse from the inner layer of the hollow fiber membrane of the membrane to the outer layer in a bubble-free manner, discharge into the cylinder, and then discharge from the water outlet. The application provided by the invention is simple and safe to operate, and can realize the treatment of BrO in drinking water 3 ‑ Efficient and fast removal.

The present invention relates to a kind of preparation method of pitavastatin calcium intermediate [[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolyl] methyl] triphenylphosphine bromide, comprising the following Said steps: make 2-cyclopropyl-4-(4-fluorophenyl)-3-quinoline methanol and triphenylphosphine hydrobromide react in an organic solvent to obtain the target compound. The preparation method of the invention has easy-to-obtain raw materials, simple operation and high yield, effectively reduces phosphorus-containing waste water and phosphorus-containing waste residue, reduces production costs, and is beneficial to large-scale production.

The invention relates to a fast detection method of bromate in bread. The fast detection method comprises the following steps of: (1) preparing liquid A and liquid B, wherein the liquid A is a hydrochloric acid solution and the liquid B is a 1% of potassium iodide solution; (2) mixing the liquid A and the liquid B with equal volumes, putting the mixture into a test tube and adding a crushed bread sample; and (3) observing the color after 1-2 minutes, and if the light purple or purple or purple blue exists, showing that the potassium bromate exists. The fast detection method has the advantages that the cost is low, the operation is convenient, the sample detection can be finished for 10 minutes, and the quantitation is fast and accurate; and the applicability to site and fast detection is achieved, the anti-counterfeiting purpose on site and a home test of consumers are met to ensure the safety and the reassurance of foods, and an effective and fast monitoring means is provided for market supervision. The fast detection method has important practical significance on the aspects of facilitating the effective supervision on the quality of a bread product, protecting the benefit of the consumers and the like.

The invention discloses a material for removing bromate and precursors thereof in water, and a preparation method and application thereof. The method comprises the following steps: (1) in a nitrogen protective atmosphere, swelling resin in a FeCl3.6H2O ethanol-water mixed solution, then adding a FeCl2.4H2O ethanol-water mixed solution, performing mixing with stirring, and then performing ultrasonic treatment, so that Fe<3+> and Fe<2+> are uniformly distributed in macropores of the resin; (2) in the nitrogen protective atmosphere, dropwisely adding a sodium hydroxide solution into the mixed solution obtained after the ultrasonic treatment in the step (1), performing a stirring reaction, and performing heating to 60-65 DEG C for a further reaction; and (3) after the reaction is completed, performing cooling to room temperature, performing filtration, performing washing, and performing drying to obtain magnetized resin which is the material for removing bromate and precursors thereof in water. The magnetized resin is applied to removal of bromate and precursors thereof in water; and the material can be recycled for a long time, and has the advantages of high removal efficiency, high separation speed and the like.

The invention discloses a preparation method of (E)-2, 3-dibromo-2-butene-1, 4-diol. The method consists of the steps of: (1) preparing an aqueous solution of the mixture of 2-butyne-1, 4-diol, a bromide and a bromate; (2) adding dilute sulfuric acid into the aqueous solution of the mixture dropwise at certain temperature, then further carrying out reaction for 10-120min, and then ending the reaction; and (3) conducting pumping filtration, recrystallization, drying and other steps on the reaction product, thus obtaining a white (E)-2, 3-dibromo-2-butene-1, 4-diol crystal. The method provided by the invention has the advantages of low cost, simple operation, safety, environmental protection, high selectivity, few by-product, high yield, etc.

Provided is a water treatment agent composition that suppresses a significant decrease in the sludge control performance (remarkable decrease in oxidizing power) of an inorganic sludge control agent, and combines a hypobromite, which is an inorganic sludge control agent, with a corrosion inhibitor in one dose. A kind of water treatment composition, it is the reactant of bromine oxidizing agent or bromine compound and chlorine oxidizing agent, and sulfamic acid compound, and the polymer comprising the monomer unit of formula (1), comprising formula (2 ), a binary copolymer comprising a monomer unit of formula (1) and a monomer unit of formula (3), a monomer unit comprising formula (1) and a monomer of formula (3) Unit and the terpolymer of the monomeric unit of formula (4), the phosphinocarboxylic acid copolymer of formula (5), the two (poly-2-carboxyethyl) phosphinic acid of formula (6), the formula (7 ) 2-phosphonobutane-1,2,4-tricarboxylic acid and its salt, and at least one anticorrosive agent among azole compounds at a pH of 13 or higher.