Structure-activity studies of dodecatungstophosphoric acid impregnated bentonite clay catalyst in hydroxyalkylation of p-cresol
| Title | Structure-activity studies of dodecatungstophosphoric acid impregnated bentonite clay catalyst in hydroxyalkylation of p-cresol |
| Publication Type | Journal Article |
| Year of Publication | 2010 |
| Authors | Garade, AC, Kshirsagar, VS, Jha, A, Rode, CV |
| Journal | Catalysis Communications |
| Volume | 11 |
| Issue | 11 |
| Pagination | 942-945 |
| Date Published | JUN |
| ISSN | 1566-7367 |
| Keywords | (31)P CPMAS NMR, Bentonite, Hydroxyalkylation, p-Cresol, surface modification |
| Abstract | Bentonite clay impregnated with dodecatungstophosphoric acid (20% DTP/BNT) showed an excellent activity, selectivity and stability [95% product yield with 94% selectivity to 2, 2'-methylenebis (4-methylphenol), DAM] for the hydroxyalkylation of p-cresol with formaldehyde at 353 K and for a mole ratio of 5. Ammonia-TPD results showed that an increase in total concentration of acid sites from 4.9 of parent bentonite to 11.6 micromoles per surface area NH(3) (mu molS(-1) NH(3)) of 20% DTP/BNT was due to a strong interaction of protons of bulk DTP with surface hydroxyl groups of BNT as evidenced by (31)P NMR studies. (C) 2010 Elsevier B.V. All rights reserved. |
| DOI | 10.1016/j.catcom.2010.04.008 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 2.827 |
Divison category:
Chemical Engineering & Process Development