4results about How to "Simple separation and purification process" patented technology

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.