5results about How to "Fast reduction reaction" patented technology

The present invention proposes a carbonation consolidation method for improving the strength of pellets. By changing the carbonation consolidation reaction system, the main reactants of the reaction process, calcium and CO2, are added to the raw balls in an ionic state. The carbonation reaction occurs in the ball-making process, and the reaction is in an ionic state. The reaction efficiency is much higher than the gas-solid reaction efficiency. The reaction is continued in depth during the drying and consolidation process to further improve the strength of the pellets, and ultimately improve the production efficiency of metallurgical solid waste carbonation consolidation and shorten the production cycle. Compared with ordinary carbonation consolidation, the pellets prepared by the process of the present invention have the characteristics of faster and more uniform carbonation reaction, higher pellet strength, and higher production efficiency.

The invention discloses a fenerenone intermediate II with a brand new structure or an optical isomer IIa of the fenerenone intermediate II and a preparation method of the fenerenone intermediate II, compared with a reaction taking 3-oxobutyric acid-2-cyanoethyl ester as a starting material, the reaction yield is improved; the invention further discloses a fenerenone intermediate III with a brand new structure or an optical isomer IIIa thereof and a preparation method thereof. The fenerenone intermediate III or the optical isomer IIIa has ester bond reduction reaction activity. Besides, the invention further discloses application of the Fnerenone intermediate II or the optical isomer IIa thereof and the intermediate III or the optical isomer IIIa thereof in preparation of Fnerenone, reduction can be achieved under the action of reducing agents such as zinc powder, expensive catalysts such as palladium carbon are not needed, the technical effect of rapid reaction under mild reaction conditions is achieved, and the method is not only suitable for small-scale tests, but also suitable for industrial production. The method is more suitable for industrial large-scale production.

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.