@article { ISI:000251244900014, title = {Cobalt-salen intercalated montmorillonite catalyst for air oxidation of p-cresol under mild conditions}, journal = {Industrial \& Engineering Chemistry Research}, volume = {46}, number = {25}, year = {2007}, note = {Joint 6th International Symposium on Catalysis in Multiphase Reactors/5th International Symposium on Multifunctional Reactors (CAMURE-6/ISMR-5-), Pune, INDIA, JAN 14-17, 2007}, month = {DEC}, pages = {8413-8419}, publisher = {AMER CHEMICAL SOC}, type = {Article, Proceedings Paper}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Air oxidation of p-cresol under very mild conditions (338 K and ambient pressure) was carried out in a semibatch reactor over a solid catalyst developed by intercalating cobalt-salen into the montmorillonite clay. The intercalation of cobalt - salen was done by a simple protocol, and the characterization of the intercalated catalyst was done by XPS, FTIR, and XRD techniques. A total selectivity \>= 90\% to the oxidation products could be achieved with this solid catalyst by eliminating the undesired coupling side products in air oxidation of p-cresol under ambient pressure conditions. Effect of various process parameters on the conversion and selectivity pattern were also studied, and it was found that the selectivity ratio of aldehyde to alcohol could be varied by suitably changing the reaction conditions. This heterogeneous catalyst was found to give a 5-fold higher turnover number than the homogeneous cobalt - salen complex.

}, issn = {0888-5885}, doi = {10.1021/ie07.00720}, author = {Rode, Chandrashekhar V. and Kshirsagar, Vikas S. and Nadgeri, Jayprakash M. and Patil, Kashinath R.} } @article { ISI:000255086600041, title = {Highly active nanostructured Co3O4 catalyst with tunable selectivity for liquid phase air oxidation of p-cresol}, journal = {Chemistry Letters}, volume = {37}, number = {3}, year = {2008}, month = {MAR}, pages = {310-311}, publisher = {CHEMICAL SOC JAPAN}, type = {Article}, address = {1-5 KANDA-SURUGADAI CHIYODA-KU, TOKYO, 101-8307, JAPAN}, abstract = {

This is a first report of highly efficient heterogeneous nanostructured Co3O4 catalyst (6-8 nm) having high surface area (95 m(2)/g) developed for selective liquid phase air oxidation of p-cresol under atmospheric pressure conditions.

}, issn = {0366-7022}, doi = {10.1246/cl.2008.310}, author = {Kshirsagar, Vikas S. and Vijayanand, Subramanian and Potdar, Hari S. and Joy, Pattayil Alias and Patil, Kashinath R. and Rode, Chandrashekhar V.} } @article { ISI:000271103500011, title = {Heterogeneous cobalt-saponite catalyst for liquid phase air oxidation of p-cresol}, journal = {Industrial \& Engineering Chemistry Research}, volume = {48}, number = {21}, year = {2009}, month = {NOV}, pages = {9423-9427}, publisher = {AMER CHEMICAL SOC}, address = {1155 16TH ST, NW, WASHINGTON, DC 20036 USA}, abstract = {

Heterogeneous Co-saponite was found to be an efficient catalyst for the liquid phase oxidation of p-cresol under mild conditions. Divalent cobalt tons were found to be in both the tetrahedral and octahedral positions of the saponite clay. Studies on the effect of reaction parameters showed that the rate of reaction increased with increase in Co loading from 5 to 13\% and then remained constant up to 30\% of Co loading, while the rate of oxidation showed a first-order dependence on the partial pressure of oxygen up to 300 kPa. Results of oxidation experiments over Co-saponite, in an Inert atmosphere, and the XPS studies Suggest Mars-van Krevelen pathway operating, which involves lattice oxygen of Co-saponite in the liquid phase oxidation of p-cresol.

}, issn = {0888-5885}, doi = {10.1021/ie801941e}, author = {Kshirsagar, Vikas S. and Garade, Ajit C. and Patil, Kashinath R. and Jha, Ratnesh Kumar and Rode, Chandrashekhar V.} } @article { ISI:000266263000034, title = {Liquid phase oxidation of p-cresol over cobalt saponite}, journal = {Topics in Catalysis}, volume = {52}, number = {6-7}, year = {2009}, month = {JUN}, pages = {784-788}, publisher = {SPRINGER/PLENUM PUBLISHERS}, address = {233 SPRING ST, NEW YORK, NY 10013 USA}, abstract = {

Liquid phase oxidation of p-cresol was carried out over a Co-saponite catalyst in a temperature and pressure range of 333-393 K and 20-827 kPa, respectively in n-propanol. Co-saponites with varying cobalt content (5-30\%) were prepared and screened among which 13\% Co-saponite gave the highest conversion of 92\% of p-cresol with 92\% selectivity to p-hydroxybenzaldehyde without formation of any non-oxidation products.

}, keywords = {Co-saponite, Liquid phase oxidation, p-Cresol, p-Hydroxybenzaldehyde, XPS}, issn = {1022-5528}, doi = {10.1007/s11244-009-9199-z}, author = {Kshirsagar, Vikas S. and Garade, Ajit C. and Patil, Kashinath R. and Shirai, Masayuki and Rode, Chandrashekhar V.} }