4results about How to "Efficient process flow" patented technology

The invention discloses a method for separating rare earth and fluoroaluminum in a high-fluoroaluminum and low-rare-earth-content material, and belongs to the field of rare earth hydrometallurgy. Aiming at the technical problems of poor selectivity and easiness in emulsification when the materials are treated by an existing single extraction system, a five-component synergistic extraction system is adopted, a mixed extraction agent is prepared according to the volume ratio of P204: P507: TBP: sec-octanol: diluent, and after hydrochloric acid pretreatment and ammonia water saponification, three-stage to six-stage counter-current extraction is carried out on the mixed extraction agent and the pretreated material liquid subjected to pH regulation. Rare earth is selectively extracted into an organic phase, fluorine and aluminum are enriched in raffinate, and efficient separation is achieved. And the rare earth-loaded organic phase is subjected to reverse extraction with high-concentration hydrochloric acid to obtain a concentrated rare earth solution, and trace rare earth in raffinate can be recovered through oxalic acid precipitation. Through the synergistic effect of specific components, the separation selectivity is remarkably improved, extraction emulsification is effectively avoided, stable operation of the process is guaranteed, and the method is particularly suitable for efficient treatment of complex high-fluorine-aluminum low-rare-earth materials.

This invention provides a method for preparing silicon carbide using waste granite powder and conductive carbon black, comprising the following steps: S1, mixing waste granite powder and conductive carbon black evenly to form a mixture; S2, ball milling the mixture and sieving it to obtain a refined mixture; S3, placing the refined mixture into a Joule apparatus and sintering it to prepare a multiphase composite powder; S4, calcining the multiphase composite powder at high temperature and then alkali washing to obtain silicon carbide powder. This invention achieves high-value recycling of waste granite powder, solving the problems of high energy consumption and long cycle time in traditional silicon carbide preparation processes, and avoiding the problems of large land occupation and significant pollution from the accumulation of building material waste. This invention aligns with the concept of green and low-carbon development, turning waste into treasure. By designing different raw material ratios and sintering parameters, different types of silicon carbide products can be prepared, creating economic benefits while controlling pollution.

The application relates to an integrated non-alkaline gel zinc-air battery and a preparation method thereof, and belongs to the technical field of zinc-air batteries. The battery comprises a zinc negative electrode, an air positive electrode, a gel electrolyte and a packaging body. The gel electrolyte is formed by in-situ gelation of a liquid precursor containing a non-alkaline zinc salt solution and a gelling agent in the packaging body, so that an integrated close contact structure is formed between the electrode and the electrolyte. The application solves the problems of easy carbonation failure and electrode corrosion of a traditional alkaline electrolyte through a non-alkaline system, and significantly improves the long-term stability and cycle life of the battery in air. Meanwhile, the process combining liquid infusion and in-situ gelation solves the problems of poor solid-state electrolyte interface contact and easy leakage of a liquid electrolyte, realizes low interface impedance and high ion transmission efficiency. The method is simple in process, does not need a crosslinking agent, and can be completed through heating, stirring and cooling steps, is suitable for large-scale production, and has high safety and excellent electrochemical performance.

The application belongs to the technical field of metal-organic framework materials and gas membrane separation, and specifically discloses a Cu-BA-AD and a preparation method thereof, a Cu-BA-AD mixed matrix membrane and application thereof. The application adopts a microwave-assisted synthesis method, and through synergistically regulating a microwave reaction time, a reaction temperature and a precursor concentration, a synthesis cycle is greatly shortened to 1 minute, and continuous gradient regulation of Cu-BA-AD particle sizes in the range of 1.2 mu m to 100 nm is realized. The obtained Cu-BA-AD nanoparticles have regular morphologies and smaller sizes, and a specific surface area is between 550 m 2 / g. When the Cu-BA-AD nanoparticles are used as fillers to prepare a mixed matrix membrane, the interface compatibility can be significantly improved, and the separation flux and selectivity of CO2 / CH4 can be greatly improved.