69 results about "Bromate salt" patented technology

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 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.

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.