Decolorisation of crude palm oil by acid-activated spent bleaching earth
Regeneration of spent bleaching earth by acid activation and heat treatment has been investigated. Spent bleaching earth was activated by H2SO4 of various concentrations (1–40%) and heat treated at 120°C–350°C. The experimental results indicate that treatment of spent bleaching earth with 10% H2SO4...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Society of Chemical Industry
1998
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| Online Access: | http://psasir.upm.edu.my/id/eprint/51716/1/51716.pdf |
| _version_ | 1796975593295708160 |
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| author | Low, Kun She Lee, Chnoong Kheng Kong, Lee Yong |
| author_facet | Low, Kun She Lee, Chnoong Kheng Kong, Lee Yong |
| author_sort | Low, Kun She |
| collection | UPM |
| description | Regeneration of spent bleaching earth by acid activation and heat treatment has been investigated. Spent bleaching earth was activated by H2SO4 of various concentrations (1–40%) and heat treated at 120°C–350°C. The experimental results indicate that treatment of spent bleaching earth with 10% H2SO4 at 350°C produced a material which was most effective in removing coloured pigments from crude palm oil. Subsequent experiments were conducted using this particular acid-treated spent bleaching earth. Various parameters which affect the sorption process were studied. They include initial crude palm oil concentration, sorbent dosage and temperature. Applicability of both the Freundlich and Langmuir isotherms to the acid-treated spent bleaching earth–palm oil hexane miscella system indicates that both physiosorption and chemisorption were involved in the sorption process. Measurements of various quality parameters of bleached and crude palm oils were carried out. They include Lovibond Colour index, carotene content, peroxide value, free fatty acid, fatty acid composition and iodine value. The results show that the bleached palm oil retained good oil quality after the decolorisation process using 10% acid-treated spent bleaching earth with a Lovibond Colour of 6·4. |
| first_indexed | 2024-03-06T09:13:46Z |
| format | Article |
| id | upm.eprints-51716 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T09:13:46Z |
| publishDate | 1998 |
| publisher | Society of Chemical Industry |
| record_format | dspace |
| spelling | upm.eprints-517162017-09-05T09:07:29Z http://psasir.upm.edu.my/id/eprint/51716/ Decolorisation of crude palm oil by acid-activated spent bleaching earth Low, Kun She Lee, Chnoong Kheng Kong, Lee Yong Regeneration of spent bleaching earth by acid activation and heat treatment has been investigated. Spent bleaching earth was activated by H2SO4 of various concentrations (1–40%) and heat treated at 120°C–350°C. The experimental results indicate that treatment of spent bleaching earth with 10% H2SO4 at 350°C produced a material which was most effective in removing coloured pigments from crude palm oil. Subsequent experiments were conducted using this particular acid-treated spent bleaching earth. Various parameters which affect the sorption process were studied. They include initial crude palm oil concentration, sorbent dosage and temperature. Applicability of both the Freundlich and Langmuir isotherms to the acid-treated spent bleaching earth–palm oil hexane miscella system indicates that both physiosorption and chemisorption were involved in the sorption process. Measurements of various quality parameters of bleached and crude palm oils were carried out. They include Lovibond Colour index, carotene content, peroxide value, free fatty acid, fatty acid composition and iodine value. The results show that the bleached palm oil retained good oil quality after the decolorisation process using 10% acid-treated spent bleaching earth with a Lovibond Colour of 6·4. Society of Chemical Industry 1998 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/51716/1/51716.pdf Low, Kun She and Lee, Chnoong Kheng and Kong, Lee Yong (1998) Decolorisation of crude palm oil by acid-activated spent bleaching earth. Journal of Chemical Technology and Biotechnology, 72 (1). pp. 67-73. ISSN 0268-2575; ESSN: 1097-4660 http://onlinelibrary.wiley.com/doi/10.1002/(SICI)1097-4660(199805)72:1%3C67::AID-JCTB881%3E3.0.CO;2-N/abstract 10.1002/(SICI)1097-4660(199805)72:1<67::AID-JCTB881>3.0.CO;2-N |
| spellingShingle | Low, Kun She Lee, Chnoong Kheng Kong, Lee Yong Decolorisation of crude palm oil by acid-activated spent bleaching earth |
| title | Decolorisation of crude palm oil by acid-activated spent bleaching earth |
| title_full | Decolorisation of crude palm oil by acid-activated spent bleaching earth |
| title_fullStr | Decolorisation of crude palm oil by acid-activated spent bleaching earth |
| title_full_unstemmed | Decolorisation of crude palm oil by acid-activated spent bleaching earth |
| title_short | Decolorisation of crude palm oil by acid-activated spent bleaching earth |
| title_sort | decolorisation of crude palm oil by acid activated spent bleaching earth |
| url | http://psasir.upm.edu.my/id/eprint/51716/1/51716.pdf |
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