- Synthesis of calcium phosphate powder from calcium lactate and ammonium hydrogen phosphate for the fabrication of bioceramics
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A calcium phosphate powder has been synthesized from aqueous 0.25, 0.5, and 1.0 M calcium lactate and ammonium hydrogen phosphate solutions atat a Ca/P = 1, without pH adjusting. According to X-ray diffraction data, the as-synthesized powder consisted of brushite (CaHPO4 · 2H2O) and octacalcium phosphate (Ca8(HPO4)2(PO4)4 · 5H2O). After heat treatment in the range 500–700°C, the powders were gray in color because of the destruction of the reaction by-product. The powders heat-treated in the range 500–700°C consisted largely of γ-Ca2P2O7. The ceramics prepared from the synthesized powders by firing at 1100°C consisted of β-Ca2P2O7 and β-Ca3(PO4)2.
- Safronova,Putlyaev,Andreev,Filippov, Ya. Yu.,Knotko,Shatalova,Evdokimov
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- Highly Efficient Iridium-Catalyzed Production of Hydrogen and Lactate from Glycerol: Rapid Hydrogen Evolution by Bimetallic Iridium Catalysts
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Mono- and bimetallic iridium complexes involving novel triscarbene ligands were synthesized and applied to the dehydrogenation of biomass-derived glycerol. This resulted in affording hydrogen and lactate with the excellent turnover number (TON; 3,240,000) and turnover frequency (TOF; 162,000 h–1). The triscarbene ligand in a single frame allowed the formation of bimetallic iridium complexes. This induced the cooperative effect of two iridium ions and rendered excellent TONs and TOFs in the production of hydrogen and lactate.
- Cheong, Yeon-Joo,Sung, Kihyuk,Kim, Jin-A,Kim, Yu Kwon,Jang, Hye-Young
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p. 4064 - 4068
(2020/09/12)
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- PREPARATION METHOD OF THE HIGH ACTIVATED CALCIUM BY SONOCHEMISTRY
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An objective of the present invention is to provide a method for manufacturing an organic acid calcium salt (calcium citrate, calcium lactate) having a high degree of ionization and easy to be solved in water. To achieve this, the method comprises the steps of: performing pretreatment by mixing one or more kinds selected from a group consisting of calcium carbonate and calcium oxide with solvent, and irradiating ultrasonic waves to the solution; a step of mixing an organic acid with the solution to form a mixture; and a step of irradiating ultrasonic waves to the mixture formed by mixing the organic acid. Accordingly, provided is an effect of providing an organic calcium salt having a high degree of ionization and capable of being solved by several or more times solubility of each compound. Moreover, the method for manufacturing an organic acid calcium salt has a simple process and equipment and an excellent effect of being manufactured within 10 minutes.COPYRIGHT KIPO 2019
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Paragraph 0073-0078; 0080-0081
(2019/10/29)
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- A polylactic acid waste recovery method (by machine translation)
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The present invention provides a polylactic acid (PLA) waste recovery method, comprises the following steps, first the PLA dissolved in the lactide in waste heat, and then adding water after the reaction, thereby obtaining a reaction mixture; then the above-mentioned step the obtained product with the calcium source after mixing and reacting, get the calcium lactate. The preparation process using high boiling point of lactide dissolved PLA waste, the high molecular weight of the PLA in the not too high temperature condition, can be at the molecular level with the water contact undergo rapid hydrolysis reaction of generating lactic acid, calcium lactate product finally obtained. The present invention provides a method for recovery of the process is simple, mild condition, high conversion rate, without the use of a catalyst, can reduce the waste emission, safety and environmental protection; and the present invention provides the preparation method also can cycle the feeding, the continuity is good, is more suitable for large-scale industrial production, it has certain economic and social benefits. (by machine translation)
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Paragraph 0081-0082
(2017/08/30)
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- Tandem catalytic conversion of glycerol using solid catalysts followed by transesterification to produce alkyl lactate
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This study investigated alkyl lactate production from glycerol by tandem processes which included glycerol conversion to calcium lactate using solid catalysts and subsequent transesterification of calcium lactate to alkyl lactate using methanol/ethanol and carbon dioxide. The effect of reaction conditions on alkyl lactate production was systematically investigated. A central composite design (CCD) and response surface methodology were used to design the experiments and evaluate the optimum process conditions. At the optimum conditions, the methyl lactate yield reached 57 mol% with a glycerol conversion of 94 mol% using refined glycerol. A yield of approximately 42 mol% for ethyl lactate was obtained using refined glycerol at the optimum conditions. Similar glycerol conversion and alkyl lactate yields were obtained using crude glycerol, indicating that the impurities in the crude glycerol had no significant effects on alkyl lactate production. The examination of regenerated catalysts that had been reused twice showed no negative effects on glycerol conversion and methyl lactate production. Compared to the traditional lactic acid and alkyl lactate production, this two-step process for alkyl lactate production from glycerol is both economical and environmentally benign since no gypsum was produced and the solid catalysts can be regenerated and reused.
- Ren, Shoujie,Ye, X. Philip,Ayers, Paul D.
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p. 53230 - 53239
(2015/06/30)
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- A GLYCEROL DERIVED MATERIAL
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A method of producing a solid glycerol derived material includes the steps of combining glycerol with a metal oxide, the glycerol having a water content of between about 5 and 50%, and the rate of combination of the glycerol and the metal oxide and the amount of the metal oxide being selected so that at least part of the water present in the glycerol reacts with the metal oxide in an exothermic reaction and at least part is driven off by heat produced in the exothermic reaction to produce the solid glycerol derived material.
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Page/Page column 56 - 58
(2010/04/03)
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- Nutritional and pharmaceutical compositions
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Th present invention relates to nutritional and pharmaceutical compositions. More particularly it is concerned with improving compositions which due to the presence of an efflorescent component may be unstable and prone to decomposition and/or spoilage. The problem is overcome by incorporating one or mote anhydrous compounds into the composition in an amount capable of sequestering any water which may be released from one or more water containing components. The preferred anhydrous compounds are anhydrous or calcined MgSO4 and CaO.
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Page/Page column 3
(2008/06/13)
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- Highly acidic metalated organic acid
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A highly acidic metalated organic acid composition and its preparation. The acidic composition can be prepared by mixing a monovalent or polyvalent cation and an organic acid in the presence of a strong oxyacid, wherein the resultant acidic composition is less corrosive to a ferrous metal than a solution of a mineral acid having the same acidic pH value as that of the acidic composition, and where in the acid composition is more biocidal than a mixture of the organic acid and a metal salt of the organic acid which mixture has the same acid normality value as that of the acidic composition. The acidic composition can be prepared by mixing at least one regenerating acid, at least one metal base, and at least one organic acid, wherein the amount of the regenerating acid is in excess of the equivalent amount of the metal base.
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Page/Page column 11
(2008/06/13)
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- COMPOSITION CONTAINING READILY ABSORBABLE CALCIUM AND PROCESS FOR PRODUCING THE SAME
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A composition containing readily absorbable calcium which comprises a calcium salt and 0.2 to 5% by weight of chondroitin sulfate based on the calcium content in the calcium salt. A calcium salt preferably used in this composition is obtained by, for example, baking external skeletons of sea urchins in an oven to thereby give calcium oxide, hydrating it into calcium hydroxide and then reacting it with an organic carboxylic acid to thereby give a calcium salt. The absorption of calcium in vivo is highly promoted by adding chondroitin sulfate. As a calcium source various natural and synthetic calcium can be used.
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