Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash
The reactivity of H-Beta zeolite, synthesised directly from crystalline rice husk ash in various SiO2/Al2O3 gel ratios, was studied in the Friedel-Crafts acylation of anisole with propionic anhydride. Reactions were carried out in a batch reactor at various times and reaction temperatures in order t...
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Penerbit UTM Press
2002
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| Online Access: | http://eprints.utm.my/1346/1/JT36C3.pdf http://eprints.utm.my/1346/ |
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| author | Ramli, Zainab Prasetyoko, Didik Endud, Salasiah |
| author_facet | Ramli, Zainab Prasetyoko, Didik Endud, Salasiah |
| author_sort | Ramli, Zainab |
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| continent | Asia |
| country | Malaysia |
| description | The reactivity of H-Beta zeolite, synthesised directly from crystalline rice husk ash in various SiO2/Al2O3 gel ratios, was studied in the Friedel-Crafts acylation of anisole with propionic anhydride. Reactions were carried out in a batch reactor at various times and reaction temperatures in order to obtain the optimum acylation condition. Products identified by gas chromatography showed that p-methoxypropiophenone is the main product with propionic acid as the main side product. Hbeta catalyst from the SiO2/Al2O3 = 27 gel ratio gave the highest activity, with anisole conversion of 88.9% and product selectivity toward p-ethoxypropiophenone of 75.3%. The optimum acylation condition was taken at 100°C reaction temperature in 4 hour reaction. Study showed that acylation reaction follows the electrophilic aromatic substitution mechanism catalysed by Brønsted acid sites of H-Beta zeolite. |
| format | Article |
| id | my.utm.eprints-1346 |
| institution | Universiti Teknologi Malaysia |
| language | en |
| publishDate | 2002 |
| publisher | Penerbit UTM Press |
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| spelling | my.utm.eprints-13462017-11-01T04:17:45Z http://eprints.utm.my/1346/ Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash Ramli, Zainab Prasetyoko, Didik Endud, Salasiah QD Chemistry The reactivity of H-Beta zeolite, synthesised directly from crystalline rice husk ash in various SiO2/Al2O3 gel ratios, was studied in the Friedel-Crafts acylation of anisole with propionic anhydride. Reactions were carried out in a batch reactor at various times and reaction temperatures in order to obtain the optimum acylation condition. Products identified by gas chromatography showed that p-methoxypropiophenone is the main product with propionic acid as the main side product. Hbeta catalyst from the SiO2/Al2O3 = 27 gel ratio gave the highest activity, with anisole conversion of 88.9% and product selectivity toward p-ethoxypropiophenone of 75.3%. The optimum acylation condition was taken at 100°C reaction temperature in 4 hour reaction. Study showed that acylation reaction follows the electrophilic aromatic substitution mechanism catalysed by Brønsted acid sites of H-Beta zeolite. Penerbit UTM Press 2002-06 Article PeerReviewed application/pdf en http://eprints.utm.my/1346/1/JT36C3.pdf Ramli, Zainab and Prasetyoko, Didik and Endud, Salasiah (2002) Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash. Jurnal Teknologi C, 36 (C). pp. 41-54. ISSN 0127-9696 |
| spellingShingle | QD Chemistry Ramli, Zainab Prasetyoko, Didik Endud, Salasiah Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash |
| title | Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash |
| title_full | Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash |
| title_fullStr | Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash |
| title_full_unstemmed | Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash |
| title_short | Friedel-Crafts Acylation Of Anisole Catalysed By H-Zeolite Beta Of Crystalline Rice Husk Ash |
| title_sort | friedel-crafts acylation of anisole catalysed by h-zeolite beta of crystalline rice husk ash |
| topic | QD Chemistry |
| url | http://eprints.utm.my/1346/1/JT36C3.pdf http://eprints.utm.my/1346/ |
| url_provider | http://eprints.utm.my/ |