3results about How to "Fast reduction reaction" patented technology

This invention relates to a hydrogen peroxide electrochemical sensor electrode, its preparation method, and its application. The invention first prepares a monolayer of MXene, and then uses it to prepare an MXene / Co mixture via a hydrothermal method with cobalt acetate tetrahydrate. 3 O 4 The nanocomposite material was then used to modify a glassy carbon electrode. This invention utilizes MXene and Co... 3 O 4 The composite material not only possesses excellent catalytic ability for hydrogen peroxide, but the presence of MXene also enhances its electron transfer-promoting ability, thereby improving catalytic efficiency. This composite material exhibits excellent hydrogen peroxide detection capabilities, with a good linear relationship between the obtained hydrogen peroxide concentration and current value, enabling quantitative detection of hydrogen peroxide content. The process of this invention is simple, stable, and low-cost; the detection limit for hydrogen peroxide reaches 0.196 μmol / L, demonstrating good detection performance and anti-interference ability.

The utility model relates to the technical field of electric smelting magnesium oxide production equipment, in particular to a direct current submerged arc furnace for producing electric smelting magnesium oxide, which comprises a base, an electric arc furnace body arranged on the base, a trolley arranged on the base, and an electric smelting furnace arranged on the trolley, a sealing cover is arranged at the side end of the trolley; during use, after materials are filled into the hearth through the hollow electrode through the driving part I and the driving part II by utilizing stable current and voltage of the direct-current power supply, the materials can be rapidly heated and melted in a plasma arc area below the hollow electrode; and then the materials are jointly heated and molten through the bottom electrode, electromagnetic stirring is formed on a molten pool in the hearth through the longitudinally-arranged hollow electrode and the bottom electrode, the reduction reaction rate is increased, and homogenization of the temperature and components of the molten pool is achieved.

The application discloses a preparation method of 3-chloro-5-fluoro-2-methylbenzoic acid, relates to the technical field of 3-chloro-5-fluoro-2-methylbenzoic acid production, and the method is characterized in that: 2-methyl-5-nitrobenzoic acid is used as a starting raw material, selective chlorination is carried out on the starting raw material in preheated high-temperature concentrated sulfuric acid and dichloro hydantoin, then esterification is completed by a one-pot method, catalytic hydrogenation reduction is carried out under low-pressure and low-temperature conditions by the synergistic action of a Raney nickel catalyst and a platinum-carbon catalyst, a high-purity amino intermediate is obtained, smooth thermal decomposition fluorination is carried out in a diglycol dimethyl ether solvent, alkaline hydrolysis and refinement are carried out, and finally the end product is obtained; the product has high purity and high yield.