5results about How to "Simple separation and purification process" patented technology

This invention belongs to the field of catalyst technology, specifically relating to a nickel-based reverse piezoelectric catalyst, its preparation method, and its application. The catalyst uses metallic nickel as both the active component and support, with an oxide loaded on the nickel surface to form the reversed host, and a composite piezoelectric material as the synergistic phase. By total mass, nickel accounts for 50%–95%, the oxide for 1%–50%, and the piezoelectric material for 0.1%–20%. This invention involves mixing and reducing a nickel precursor with an oxide, followed by the composite piezoelectric material to obtain the catalyst. The catalyst utilizes the mechanical force of ball milling and the piezoelectric effect to synergistically catalyze the hydrogenation of carbon dioxide to methane, abandoning traditional high-temperature thermocatalysis. This catalyst can achieve highly efficient carbon dioxide conversion under mild conditions, with 100% methane selectivity and significantly improved reaction efficiency, showing promising application prospects in the field of carbon dioxide resource utilization.

The invention discloses a purification method and application of bacitracin A, and relates to the field of biology. According to the method for purifying the bacitracin A, preparation of the high-purity bacitracin A is achieved through liquid chromatographic separation, the purity of the bacitracin A can reach 95% or above, the separation and purification process of the high-purity bacitracin A is simplified to a great extent, the loss of reagents in the separation and purification stage is reduced, and the yield of the high-purity bacitracin A is increased. The method has the advantages of high separation purity, less organic solvent dosage, simple device, simple and convenient process operation, environmental protection and the like, and is suitable for process production.

The application relates to the technical field of inorganic chemical synthesis, in particular to a sodium carbonate preparation method based on ternary synthesis technology. The method takes sodium chloride, liquid ammonia and carbon dioxide as ternary raw materials, and through a'segmented carbonization-gradient temperature control crystallization-CO2 closed loop recovery-mother liquor optimization treatment' synergistic process, first, uniform crystal nuclei are induced through low-temperature pre-carbonization, then, sufficient reaction is promoted through medium-temperature deep carbonization, and the crystal structure is optimized by combining gradient cooling crystallization and aging, and the efficient recycling of carbon, ammonia and salt resources is realized. The application improves the carbon dioxide utilization rate and the product purity, optimizes the crystal particle size uniformity, reduces the energy consumption and the environmental protection load, the process is stable and easy to control, and has strong industrialization adaptability, and the obtained sodium carbonate can meet the strict requirements in the fields such as food processing, and has economic and environmental benefits.

This invention belongs to the field of haloalkanes preparation, specifically relating to a method and apparatus for preparing perfluoroalkanes. The method for preparing perfluoroalkanes includes the following steps: [The text abruptly ends here, so the translation stops.] 2‑4 Alkanes and fluorine undergo a substitution reaction in the presence of a catalyst, wherein the catalyst is a transition metal or its fluoride. The reacted gas is then washed with water to remove impurities, dried to remove water, and purified by distillation to obtain perfluoroalkanes. This invention utilizes a high-temperature catalytic fluorine substitution process, followed by water washing to remove fluorine impurities. The catalyst used is transition metal particles or transition metal fluoride particles, which have a simple structure and low cost. The separation and purification process is simplified and effective, effectively reducing the industrial production cost of perfluorobutane and other perfluoroalkanes.

The application discloses a preparation method of a cerium oxide supported palladium catalyst and application of the catalyst in a solvent-free catalytic hydrogenation reaction of squalene, and belongs to the field of catalyst preparation and application. The catalyst takes cerium oxide as a carrier, and palladium is loaded through a deposition precipitation method to form a high-dispersion cerium oxide supported palladium catalytic system. The synergistic effect between the cerium oxide and the palladium significantly improves the hydrogenation efficiency and selectivity of the catalyst, and the catalyst is suitable for the catalytic hydrogenation reaction of squalene under a solvent-free condition. Compared with a traditional Pd / C catalyst, the prepared catalyst has higher activity, and the preparation method is simple, low in cost, and capable of efficiently catalyzing the hydrogenation of squalene under a solvent-free condition.