5results about How to "Good sustained release" patented technology

The present application belongs to the technical field of biochar, and particularly relates to a high-activity acidolysis biochar, which is prepared by the following steps: S1, pretreating agricultural and livestock waste; S2, acidolysing the pretreated biomass with dilute acid to obtain acidolysed biomass; S3, placing the acidolysed biomass into a high-temperature furnace to perform carbonization under an oxygen-free condition, and using a step-by-step heating mode to obtain preliminary biochar; and S4, mixing the preliminary biochar with a copolymer solution to prepare the high-activity acidolysis biochar. In the present application, the sodium lignosulfonate-polyglutamic acid copolymer forms a stable connection with the biochar through chemical bonding, the porous surface of the biochar is uniformly covered with the copolymer to form a nanoscale film, the composite has stronger complexing, chelating and ion exchange capacity for heavy metal ions and other cations in the soil, and is helpful to reduce toxic substances in the soil and improve the soil environment.

The invention discloses a multi-element carbon-based microbial blended fertilizer for rice quality improvement and yield increase, and relates to the technical field of fertilizers, and the multi-element carbon-based microbial blended fertilizer comprises the following raw materials by weight: 10-20 parts of a multi-element carbon source, 40-50 parts of a compound fertilizer, and 1-1.5 parts of a vermiculite-loaded microbial agent. The vermiculite-loaded microbial agent is prepared from modified vermiculite-loaded nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and growth-promoting bacteria, so that the microbial strains can be slowly released and maintain the activity, and the activity of microbial flora can be durably promoted by combining a multi-element carbon source and a compound fertilizer; the flora activity promotes the release and absorption of multi-element carbon source nutrients, and the fertilizer efficiency of the microbial blended fertilizer is effectively prolonged, so that the rice quality improvement and yield increase are promoted.

The invention relates to a multifunctional medicine release composition as well as a preparation method and application thereof. The multifunctional medicine release composition has a treatment effect on attention deficit and attention disorder of children. The invention also provides a dispersible sustained-release multi-unit pellet system which comprises an active pharmaceutical ingredient and pharmaceutically acceptable auxiliary materials, and the active pharmaceutical ingredient exists in the core pellet. The invention also relates to a method for preparing the sustained-release multi-unit pellet system by adopting a multi-seal coating technology. The dispersible slow-release multi-unit pellet system disclosed by the invention has a good release characteristic.

The application discloses a method for removing titanium impurities in phosphoric acid solution, which comprises the following steps: extracting the phosphoric acid solution containing titanium impurities by using an organic solvent, and collecting the organic phase; mixing the organic phase with the phosphoric acid solution, adding an oxidant and hydrofluoric acid, and mixing uniformly to obtain a mixed solution; adding an ammonium fluoride solution dropwise into the mixed solution to react, and obtaining a reaction solution; washing, clarifying and separating the phases of the reaction solution, and back-extracting the organic phase to obtain the phosphoric acid solution from which the titanium impurities are removed; the removal method is characterized in that: firstly, trace H2O2 is used to convert titanium into active peroxotitanium species; secondly, the initiation effect of NH4F is used to activate the activity of fluoride ions; finally, HF is used as a main fluorine source to form a stable fluorotitanium complex and migrate to the acid phase, and low-titanium purified phosphoric acid is obtained after separation, so that the removal of titanium impurities is realized.

This invention belongs to the field of medical patch technology. It discloses a reusable patch comprising, from bottom to top, a non-woven fabric layer, a PU film adhesive layer, a core, a leak-proof pad, a cover cotton, and a release film. The outer surface of the PU film is coated with a composite adhesive layer for durable adhesion. The core, made of a special matrix, traditional Chinese medicine powder, oil, and excipients, is adhered to the center of the PU film through this composite adhesive layer. A leak-proof pad, preferably with an annular leak-proof ring, is provided between the core and the PU film to effectively prevent side leakage of the core components. The cover cotton covers the core to absorb trace amounts of exudate. This invention, through the synergistic design of the silicone gel composite adhesive layer and the leak-proof structure, ensures good sustained-release of the medication and comfortable application while enabling the patch to be repeatedly peeled and reapplied. This solves the problems of traditional single-use patches being prone to leakage and contamination, making it economical, practical, and providing a superior user experience.