Acidity tuning of montmorillonite K10 by impregnation with dodecatungstophosphoric acid and hydroxyalkylation of phenol: Fid-Bau Portal

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Acidity tuning of montmorillonite K10 by impregnation with dodecatungstophosphoric acid and hydroxyalkylation of phenol

Garade, A.C. / Kshirsagar, V.S. / Mane, R.B. / Ghalwadkar, A.A. / Joshi, U.D. / Rode, C.V.

AbstractAcidity tuning of montmorillonite K10 (mont K10) was achieved by impregnating with dodecatungstophosphoric acid (DTP). The effect on the hydroxyalkylation of phenol was studied at 353K with phenol to formaldehyde molar ratio of 5. The nature and strength of acid sites were determined by NH3-TPD measurement while the distribution of Brønsted and Lewis acid sites expressed as B/L ratio, was determined by pyridine IR technique. Among various loadings of DTP (5–60%) studied for the hydroxyalkylation of phenol, 20% DTP/mont K10 showed the highest catalyst activity (90% selectivity to bisphenol F with 28% conversion of phenol). Both total concentration of acid sites and the distribution of acid sites in a high temperature region were required for the high bisphenol F selectivity. Our catalyst (20% DTP/Mont K10) could be recycled three times.

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Acidity tuning of montmorillonite K10 by impregnation with dodecatungstophosphoric acid and hydroxyalkylation of phenol

Garade, A.C. / Kshirsagar, V.S. / Mane, R.B. / Ghalwadkar, A.A. / Joshi, U.D. / Rode, C.V.

AbstractAcidity tuning of montmorillonite K10 (mont K10) was achieved by impregnating with dodecatungstophosphoric acid (DTP). The effect on the hydroxyalkylation of phenol was studied at 353K with phenol to formaldehyde molar ratio of 5. The nature and strength of acid sites were determined by NH3-TPD measurement while the distribution of Brønsted and Lewis acid sites expressed as B/L ratio, was determined by pyridine IR technique. Among various loadings of DTP (5–60%) studied for the hydroxyalkylation of phenol, 20% DTP/mont K10 showed the highest catalyst activity (90% selectivity to bisphenol F with 28% conversion of phenol). Both total concentration of acid sites and the distribution of acid sites in a high temperature region were required for the high bisphenol F selectivity. Our catalyst (20% DTP/Mont K10) could be recycled three times.

Acidity tuning of montmorillonite K10 by impregnation with dodecatungstophosphoric acid and hydroxyalkylation of phenol

Garade, A.C. / Kshirsagar, V.S. / Mane, R.B. / Ghalwadkar, A.A. / Joshi, U.D. / Rode, C.V.

AbstractAcidity tuning of montmorillonite K10 (mont K10) was achieved by impregnating with dodecatungstophosphoric acid (DTP). The effect on the hydroxyalkylation of phenol was studied at 353K with phenol to formaldehyde molar ratio of 5. The nature and strength of acid sites were determined by NH3-TPD measurement while the distribution of Brønsted and Lewis acid sites expressed as B/L ratio, was determined by pyridine IR technique. Among various loadings of DTP (5–60%) studied for the hydroxyalkylation of phenol, 20% DTP/mont K10 showed the highest catalyst activity (90% selectivity to bisphenol F with 28% conversion of phenol). Both total concentration of acid sites and the distribution of acid sites in a high temperature region were required for the high bisphenol F selectivity. Our catalyst (20% DTP/Mont K10) could be recycled three times.

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Title:

Acidity tuning of montmorillonite K10 by impregnation with dodecatungstophosphoric acid and hydroxyalkylation of phenol

Contributors:

Garade, A.C. (author) / Kshirsagar, V.S. (author) / Mane, R.B. (author) / Ghalwadkar, A.A. (author) / Joshi, U.D. (author) / Rode, C.V. (author)

Published in:

Applied Clay Science ; 48 ; 164-170

Publication date:

2009-11-23

Size:

7 pages

ISSN:

DOI:

https://doi.org/10.1016/j.clay.2009.11.042

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Hydroxyalkylation , Acidity tuning , Temperature programmed desorption , Impregnation , Dodecatungstophosphoric acid/Montmorillonite K10

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