625-71-8Relevant articles and documents
Nitrogen-doped cobalt nanocatalysts for carbonylation of propylene oxide
Chen, Lin,He, Lin,Xia, Chungu,Yang, Bingxiao,Zeng, Bo,Zhu, Gangli
, (2020/07/16)
Nitrogen-doped cobalt nanoparticles loaded on porous supports were developed for ring-opening carbonylation of propylene oxide. The catalysts were prepared by simply pyrolysis of Co(OAc)2/phenanthroline and supports. As proved by XPS combined with XRD and TEM characterizations, a higher amount of available Co-N sites were responsible for promoting the carbonylative activity. The selectivity of carbonylated products reached 93 percent, which is comparable to previously reported cobalt carbonyl catalysts. The novel type of carbonylative catalyst also could be reused and revealed fine stability due to the continuous generation of active [Co(CO)4]? species during reaction.
ORAL SUPPLEMENTS OF FATTY ACID AND AMINO ACID KETONE ESTERS TO IMPROVE METABOLIC, PHYSICAL AND COGNITIVE HEALTH
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Paragraph 0030; 0032, (2019/08/27)
An ester of beta-hydroxy butyrate or derivate esterfied with an amino acid or fatty acid used as an oral supplement.
Method for preparing 3- hydroxybutyrate
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Paragraph 0056-0058; 0060-0062; 0064-0066, (2019/03/08)
The invention discloses a method for preparing 3-hydroxybutyrate. The method comprises the steps that (1) 3-ethyl hydroxybutyrate or 3-methyl hydroxybutyrate is provided and is hydrolyzed through a base catalyst to obtain 3-hydroxybutyric acid; and (2) the 3-hydroxybutyric acid reacts with an inorganic base to obtain the 3- hydroxybutyrate. Through the method, an aquatic salt forming mode is adopted, reacting is more complete, the reaction time is saved, energy consumption and material losses are lowered, the product yield is improved, and the production cost is saved. The concentration process in preparation of 3-hydroxybutyrate crude products is omitted, the series of processes of refining concentration of anhydrous ethanol, adding of acetone for crystallization, filtering, washing, drying and the like in preparing of 3-hydroxybutyrate finished products are omitted, an organic solvent, namely, acetone is omitted, material losses and energy consumption for the corresponding processesare reduced, and the production cost of the 3-hydroxybutyrate is greatly lowered. The heating process in roughing and refining of the 3-hydroxybutyrate is reduced, the problem that the 3-hydroxybutyrate finished products are easily affected with damp is also solved through the aquatic salt forming mode, and the quality of the 3-hydroxybutyrate is guaranteed.
