2results about How to "High surface area" patented technology

The application discloses a preparation method of a polymyxin B sulfate dry powder and belongs to the technical field of medicine preparation. The preparation of the polymyxin B sulfate dry powder is that the polymyxin B sulfate fermentation liquor is subjected to adsorption filtration by using a ZIF-8@polyurea / polyether sulfone composite membrane, and the filter cake is subjected to elution by using a sulfuric acid aqueous solution. The eluate is post-treated to obtain the polymyxin B sulfate dry powder. The application has the advantages of mild preparation condition, simple process, low reaction energy consumption and industrial application prospect.

The application provides a kind of revivification method of hydrocracking waste catalyst, with hydrocracking waste catalyst as raw material, on the basis of not destroying catalyst forming structure, according to saturated water absorption, different proportion of inorganic acid-organic acid-organic ligand mixed solution is prepared and treated by solvent induced coordination method, the polychaete organic ligand and organic acid in mixed solution are coordinated with dissolved active metal to generate metal-organic complex, re-impregnation process is carried out in micro excess solution, without filtration and avoiding the phenomenon of metal loss caused in drying process, without re-shaping treatment and additional carrier and metal, realizing the recycling of hydrocracking waste catalyst, and effectively improving the hydrocracking reaction performance of catalyst. The application improves resource utilization, simplifies process treatment process, greatly reduces energy consumption, effectively saves cost, realizes the sustainable utilization of waste resources.