21872-45-7Relevant academic research and scientific papers
Production of compounds to be used as fuel additive: Glycerol conversion using Nb-doped MgAl mixed oxide
Souza, Juber,Souza, Priscila M.T.G.,De Souza, Patterson P.,Sangiorge, Daniel L.,Pasa, Vanya M.D.,Oliveira, Luiz C.A.
, p. 65 - 72 (2013/08/23)
MgAl mixed oxide from hydrotalcite was modified with niobium and evaluated as a catalyst for a liquid-phase glycerol conversion in the presence of hydrogen peroxide. Niobium oxide exhibited high activity for glycerol conversion via heterogeneous catalysis at 250 C. Gas chromatography with mass spectrometry (GC-MS) analysis of the reaction showed that diglycerol, ethers and ketone were the main products. The results strongly suggest that the glycerol conversion involves acid groups and oxidizing species generated upon reacting with H 2O2 and niobium. Furthermore, catalytic tests monitored by electrospray mass spectrometry (ESI-MS) suggest that ethers, such as di, tri and tetra glycerols, are formed during the glycerol condensation (m/z = 167, 223, 241, and 315). Preliminary tests using the reaction products as additives for gasoline demonstrate that the octane is increased due to the presence of ether formed from glycerol conversion.
PROCESS OF PRODUCING POLYGLYCEROL FROM CRUDE GLYCEROL
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Page/Page column 3, (2011/06/10)
The present invention relates to a process for accelerated preparation of polyglycerol from crude glycerol using microwave irradiation as the heat element in the presence of soap as the catalyst. The process includes the steps of (a) heating the crude glycerol that contain soap to an elevated temperature for a certain reaction time by using a microwave technology, (b) acidifying the crude polyglycerol with mineral acid at a specific temperature and centrifuging acidified crude product obtained from step (b) at a specific temperature for a certain duration of time.
Polyglycerols and production thereof
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Page/Page column 5, (2008/06/13)
A polyglycerol composition contains diglycerol, triglycerol, and tetraglycerol each in a content of 5 percent by weight or more, has a total content of diglycerol, triglycerol, and tetraglycerol of 75 percent by weight or more, has a total content of higher polyglycerol components of 10 percent by weight or less, the higher polyglycerol components each having a degree of polymerization of 7 or higher, and is substantially free from chlorine atom. A process prepares a polyglycerol composition by reacting glycerol and/or a polyglycerol with glycidol in the presence of an activated carbon catalyst.
Synthesis of Dibromohydrins from Glycerol by Using an Ion Exchange Resin as Catalyst
Bouillaud, Alain,Dargelos, Marianne,Borredon, Marie-Elisabeth
, p. 2123 - 2128 (2007/10/02)
Bromination of glycerol by 48percent hydrobromic acid in the presence of an acid ion exchange resin (C264 or A19) led to the formation of a mixture of 1,3- and 2,3-dibromohydrins in a yield of around 70percent.The side products were essentially brominated polyglycerols.
