33242-26-1Relevant articles and documents
Glycine-mediated, selective preparation of monodisperse spherical vaterite calcium carbonate in various reaction systems
Lai, Yonghua,Chen, Liangsen,Bao, Weichao,Ren, Yihua,Gao, Yuxing,Yin, Yingwu,Zhao, Yufen
, p. 1194 - 1200 (2015)
Selective formation of monodisperse spherical vaterite calcium carbonate (CaCO3) precipitate using glycine (Gly) in a calcium hydroxide (Ca(OH)2)-carbon dioxide (CO2) reaction system at room temperature and atmospheric pressure is reported. Crystalline products were examined by scanning electron microscopy, powder X-ray diffraction, Fourier transform infrared spectrometer, Raman spectra and laser particle size analysis. The experimental results suggest that increasing Gly concentration caused inhibition of the nucleation and growth of calcite and promoted the formation of vaterite. By adjusting the content of additive Gly, the crystalline product was almost monodisperse spherical vaterite CaCO3. The resulting product had good thermal stability, still keeping its crystal type, spherical shape, and size after being heated above 350 °C. Mechanism studies illustrated that the complex effects between Gly and Ca2+ played the key role in the formation process of monodisperse spherical vaterite CaCO3. Further studies indicated that this method might also apply to other reaction systems, such as CaCl2-NH3·H2O-CO2 and CaCl2-Na2CO3 reaction systems. These studies are paving the way for industrial preparation and further commercial applications of monodisperse spherical vaterite CaCO3.
Preparation method of calcium glycinate chelate
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Paragraph 0041; 0042; 0043; 0044; 0045, (2017/07/23)
The invention relates to a preparation method of a calcium glycinate chelate. The method comprises the following three steps: 1) synthesis reaction: adding glycine, calcium oxide, calcium acetate and water into a reaction kettle according to certain proportion, stirring and mixing, and heating to the reaction temperature, wherein reaction liquid is obtained after some time of reaction; 2) product purification: filtering while the reaction liquid is hot to obtain primary filtrate and primary filter residue; performing alcohol precipitation of the primary filtrate; standing for a period of time, and performing centrifugal separation to obtain alcohol precipitation liquid and precipitate; and drying the precipitate to obtain a product of calcium glycinate chelate; and 3) aftertreatment: rectifying the alcohol precipitation liquid and recycling the alcohol for alcohol precipitation again; and returning the rectifying still liquid and the primary filter residue into the reaction kettle for recycling. The method provided by the invention has the advantages of simple production technical process, high production efficiency, low production cost, no generation of three wastes and the like, and facilitates industrial production; and the product of calcium glycinate chelate has good dispersity and does not cake easily.
Compositions and methods for increasing metabolic activity in animal tissue
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Page/Page column 6, (2008/12/07)
The present invention is directed to methods and compositions which include high nitrogen metal amino acid chelates that can increase the metabolic activity or metal concentration in animals. In one embodiment, an amino acid composition can comprise an amino acid chelate with a first metal and first amino acid ligand, where the first amino acid ligand is devoid of a disulfide bond and has at least two nitrogen atoms, and an amino acid complex different from the amino acid chelate having a second metal and second amino acid ligand. The amino acid composition can also include nitrogen salts, proteinates, urea, nitric acid, carnitine, creatine, glucosamine, chondroitin, chitosan, nitrogen-containing botanicals, and combinations thereof.
