Production of compounds to be used as fuel additive: Glycerol conversion using Nb-doped MgAl mixed oxide
作者:Juber Souza、Priscila M.T.G. Souza、Patterson P. de Souza、Daniel L. Sangiorge、Vanya M.D. Pasa、Luiz C.A. Oliveira
DOI:10.1016/j.cattod.2013.03.040
日期:2013.9
250 °C. Gas chromatography with massspectrometry (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 H2O2 and niobium. Furthermore, catalytic tests monitored by electrospray massspectrometry (ESI-MS) suggest that ethers, such
用铌对水滑石的MgAl混合氧化物进行了改性,并在过氧化氢的存在下将其用作液相甘油转化的催化剂。氧化铌在250°C下通过非均相催化对甘油的转化表现出高活性。反应的气相色谱(GC-MS)分析表明,主要成分为甘油二酯,醚和酮。结果强烈表明,甘油转化涉及酸基和与H 2 O 2和铌反应生成的氧化物质。此外,通过电喷雾质谱(ESI-MS)监控的催化测试表明,甘油缩合过程中会形成醚,例如二,三和四甘油(m /z = 167、223、241和315)。使用反应产物作为汽油添加剂的初步测试表明,由于存在甘油转化形成的醚,辛烷值得以提高。
Polyglycerols and production thereof
申请人:Endo Toshio
公开号:US20070049775A1
公开(公告)日:2007-03-01
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.
PROCESS OF PRODUCING POLYGLYCEROL FROM CRUDE GLYCEROL
申请人:Soi Hoong Seng
公开号:US20110118508A1
公开(公告)日:2011-05-19
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.