Transesterifications over titanosilicate molecular sieves
Srinivas, D; Srivastava, R; Ratnasamy, P
| HERO ID | 4937161 |
|---|---|
| In Press | No |
| Year | 2004 |
| Title | Transesterifications over titanosilicate molecular sieves |
| Authors | Srinivas, D; Srivastava, R; Ratnasamy, P |
| Journal | Catalysis Today |
| Volume | 96 |
| Issue | 3 |
| Page Numbers | 127-133 |
| Abstract | Titanosilicate molecular sieves (TS-1, Ti-MCM-41 and amorphous TiO2-SiO2) catalyze transesterification reactions. Acidity measurements (pyridine adsorption-IR and NH3-TPD) reveal the presence of only weak Lewis acid sites. Catalytic activity parallels the acid strength and increases in the order: TS-1 < Ti-MCM-41 < amorphous TiO2-SiO2. TS-1 efficiently catalyzes the transesterification of only linear esters (ethylacetoacetate and diethylmalonate), but fails for cyclic esters like propylene carbonate. Ti-MCM-41 and amorphous TiO2-SiO2 are superior for the latter. The catalysts could be recycled without any loss in activity/selectivity. (C) 2004 Elsevier B.V. All rights reserved. |
| Doi | 10.1016/j.cattod.2004.06.113 |
| Wosid | WOS:000224357500006 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |
| Keyword | transesterification; titanosilicates; acid catalyzed reactions; cyclic carbonate; propylene carbonate; dimethyl carbonate; dialkyl carbonates; pyridine adsorption-IR; NH3-TPD |