01482nas a2200157   4500008004100000022001400041245011000055210006900165260007100234300001400305490000700319520083400326100002101160700001701181856012601198       2012                        eng d  a0888-588500aCalcined, rare earth modified hydrotalcite as a solid, reusable catalyst for dimethyl carbonate synthesis0 aCalcined rare earth modified hydrotalcite as a solid reusable ca  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a6356-63630 v513 a<p>An eco-friendly building block and fuel additive dimethyl-carbonate (DMC)-was synthesized through a benign route by transesterification of propylene carbonate (PC) with methanol. The catalytic activity of a series of calcined, rare earth elements (La3+, Ce3+, Pr3+, Sm3+, and Y3+; 2-10 mol %) incorporated Mg-Al hydrotalcites (HT) was evaluated for this reaction. Among several, the La (8 mol %) modified HT showed the highest activity (PC conversion = 65.4 mol % and DMC selectivity = 88 mol % at 150 degrees C and in 2 h). Basicity of the catalyst played an important role on the transesterification activity. The influence of reaction parameters and calcination temperature on the catalytic activity of HT was investigated. The La modified HT catalyst was heterogeneous and could be reused with little loss of activity.</p>1 aUnnikrishnan, P.1 aSrinivas, D.  uhttps://library.ncl.res.in/content/calcined-rare-earth-modified-hydrotalcite-solid-reusable-catalyst-dimethyl-carbonate-0