6 results about "Calcium oxalate" patented technology

Systems and methods for use in wastewater treatment plants that use aerobic digestion are provided. The systems and methods precipitate phosphates from the supernatant of an aerobic digest to produce a brushite-containing sludge, at least a portion of which is recirculated back into the aerobic digest. The methods reduce phosphate in the reject water produced by dewatering an aerobic digestate, while maintaining the pH of the aerobically digested sludge in a suitable range for polymer flocculants commonly used in sludge dewatering.

This invention provides an ion-doped calcium oxalate thermochemical heat storage material and its preparation method, the chemical formula of which is Ca. 1‑ x M x C2O4·H2O, where M is a dopant ion and x is the mole fraction of the dopant ion; M includes Mg 2+ Co 2+ Zn 2+ 、Sr 2+ One or more of the following. This invention regulates the lattice parameters, local coordination environment, defect state, and microstructure of calcium oxalate by doping with ions. While maintaining the original reversibility and cycle stability of the calcium oxalate system, it further optimizes its dehydration thermal storage temperature range, thermal response boundary, structural evolution behavior, and application compatibility materials, thereby improving the thermochemical thermal storage performance of calcium oxalate from the internal structural level.

This invention discloses a highly antibacterial oral sealant for treating dentin hypersensitivity, its preparation method, and its application. The sealant's raw materials include calcium oxalate, diammonium hydrogen phosphate, tetraethyl orthosilicate, and cerium nitrate hexahydrate. It is a bioactive material that can generate hydroxyapatite in a short time and exhibits good biocompatibility. This sealant regulates and stabilizes Ce... 3+ Ce 4+ The ratio of these components results in high antibacterial properties, making it suitable for use as an oral sealant. It primarily works by sealing the gaps between the pits and fissures of teeth to block bacterial invasion, thereby improving the acid resistance of tooth enamel and preventing cavities. At the same time, this material has good bactericidal properties, allowing for deeper bacterial removal and ensuring a clean oral environment.

This patent document discloses novel oxamaies that can act as potent inhibitors of calcium oxalate (CaOx) crystallization and new macrocyclic prodrugs that will offer improved lipophilicity, small size, lower polar surface area, and greatly reduced solvent accessible surface area, all properties known to impart better oral bioavailability. Also disclosed herein are methods of treating diseases associated with abnormal levels of calcium oxalate and its crystallization.

The application discloses a preparation method of high-purity chlorine-free stomach-protecting sodium ion water, and belongs to the technical field of drinking water processing. The preparation method is characterized by using food-grade sodium carbonate, oxalic acid and calcium carbonate as raw materials, accurately feeding based on the atomic weight stoichiometric ratio, and realizing deep removal of impurities through step-by-step precipitation reaction. First, sodium carbonate and oxalic acid are reacted to generate a mixed mother liquor containing sodium ions and oxalate ions; then, calcium carbonate is added to convert the oxalate ions into calcium oxalate precipitates, and the calcium oxalate precipitates are removed through filtration; finally, high-purity sodium ion water which is chlorine-free, impurity-free and mild to the stomach is obtained. The preparation method has the advantages of normal temperature and pressure, safe and easily-obtained raw materials, low production cost, simple and easy-to-operate process, and the like, the by-products can be recycled, no waste is generated, and the preparation method is suitable for large-scale production of drinking-grade high-purity chlorine-free sodium ion water.