3 results about "Calcium complex" patented technology

This application provides a method for deep removal of calcium impurities from scandium oxide, belonging to the field of rare earth metal oxide purification. The method includes: dissolving scandium oxide raw material containing calcium impurities to obtain a calcium-containing scandium solution; adding a pH adjuster to the calcium-containing scandium solution to obtain a first scandium solution; reacting the first scandium solution with phosphoric acid and / or phosphate to obtain a second scandium solution and solid calcium phosphate; reacting the second scandium solution with a complexing agent to obtain a third scandium solution; reacting the third scandium solution with oxalic acid and / or sodium oxalate to obtain scandium oxalate crystals and a calcium complex solution; adding a strong acid solution to the calcium complex solution; and calcining the scandium oxalate crystals to obtain scandium oxide. Through calcium phosphate precipitation-complexation-crystallization, not only can calcium impurities be deeply removed from scandium oxide products, but impurities such as iron, titanium, and zirconium can also be removed, resulting in scandium oxide products with a purity of over 99.99%.

This invention relates to the field of edible mushroom cultivation technology, and discloses a mushroom cultivation medium based on fungi grass modified with tannin-calcium complexation and containing a plant-derived biochar framework, as well as its preparation method. The medium uses fungi grass fiber as the main carbon source. The fungi grass fiber is complexed and modified with tannins and soluble calcium salts to form a complexed and solidified layer on its surface, thus delaying later spoilage and structural failure. Plant-derived biochar particles are introduced as an inert physical support framework to enhance the structural stability and long-lasting aeration of the medium. The medium preferably employs a dual-particle size structure of coarse fiber and fine powder, and is combined with wheat bran / rice bran, calcium regulators, and gypsum or lime to maintain high strength and aeration of the mushroom logs under multi-flush fruiting conditions, reducing the risk of collapse, soft rot, and contamination by microorganisms, and improving later yield retention and cumulative yield.

The application discloses a probiotic calcium tablet and a preparation method thereof. The probiotic calcium tablet comprises the following raw materials in parts by weight: a calcium compound 40-60 parts; a probiotic compound 10-20 parts; an absorption promoter 15-25 parts; a stabilizer 8-15 parts; and a flavor modifier 5-10 parts. The application can solve the problems of low calcium absorption rate and easy inactivation of probiotics in the prior art.