3results about How to "Wide operating range" patented technology

The application discloses a kind of safety belt electric cleaning device for electrical equipment, it is related to electromechanical equipment technical field, technical scheme is, including insulating shell, insulating rope, insulating support rod, multiple insulating balls are fixedly installed on the insulating rope, recycling passage, communication passage, air injection passage, sponge barrel are equipped in the inside of insulating shell, the inside of sponge barrel is equipped with multiple evenly distributed annular protrusions, six struts are further equipped in the inside of sponge barrel and are arranged according to annular array with sponge barrel as center, fixed end cap is fixedly connected to one end of the strut, movable end cap is installed to the other end of the strut, dirt on the surface of electrical equipment is dissolved by cleaning fluid and is carried away by insulating rope and insulating ball, avoid dirt and insulating cleaning fluid to splash to the surface of electrical equipment around, all the devices are made of insulating material, can be charged cleaning to electrical equipment.

This invention relates to the field of pharmaceutical synthesis technology, specifically disclosing a method for preparing a gipotassium intermediate. The method uses 2-aminopropane-1,3-diol and 6-methoxy-2-chloro-3-nitropyridine as starting materials, and proceeds through multiple steps including nucleophilic substitution, acetal protection, reduction, N-alkylation, cyclization, oxidation, deprotection, sulfonation, and deprotection-salting-desalting reactions to obtain a target intermediate with high optical purity. This invention optimizes the reaction system and process conditions, especially in the downstream chiral construction stage, innovatively integrating the removal of the Boc protecting group and chiral separation into a single step. Utilizing the selective precipitation of the target diastereomeric salt by levonormonal camphor sulfonic acid in an acetonitrile system, it achieves integrated reaction and separation, effectively solving the technical bottlenecks of existing technologies that rely on preparative chiral chromatography columns, such as lengthy synthetic routes, low overall yields, harsh reaction conditions, dependence on expensive or hazardous reagents, and difficult purification.

This invention relates to a method for recovering associated zinc from copper concentrate during copper smelting, belonging to the field of non-ferrous metal smelting and mineral processing technology. The method includes: preparing and grinding copper concentrate to obtain a finely ground slurry; the -0.074 mm particles in the finely ground slurry constitute 92-95% of the total solid particles; mixing the finely ground slurry with a copper collector and a zinc inhibitor; the zinc inhibitor contains sulfur dioxide, and the mixing temperature of the zinc inhibitor and the finely ground slurry is 40-50°C; and using microbubble flotation technology to separate copper from zinc concentrate using flotation, obtaining copper concentrate and zinc concentrate; the foam diameter of the microbubble flotation is 30-80 μm. This invention achieves efficient inhibition of zinc minerals by controlling the copper flotation separation temperature, at which waste sulfur dioxide is used synergistically as a zinc inhibitor, further controlling the particle size of the fine grinding and the foam diameter during flotation, thus constructing an integrated copper-zinc separation and zinc recovery process.