THE BLEACHING OF PALM OIL USING ACTIVATED CHARCOAL
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The charcoal used for this work was made from pieces of animal bone by carbonization method. It was then activated into two different samples. Firstly, the basic sample was activated using anaphoric acid (H2 s04) while the other was activated by just heating as a control for the experiment; both at a constant temperature of 5000c and approximate time of 2hours.
They were both size reduced into fines and sieved into particle 3ye of 150um portion of the crude palm oil was degummed and neutralized for bleaching. Each interval of bleaching with both the acid activated and the ordinary activated charcoal was 8mins and temperature of 1500c over a hot plate, and subsequent filtration of the solution.
A spectrophotometer was used to measure the absorbance of the oils (crude and bleached) at selected wave length of 480Um. This was converted as the degree of colour reduction expressed in percentages.
Results obtained showed that optimum quantity of the charcoal for bleaching is 5% by weight, of the oil, which gives a percentage colour reduction as 97. 14% for the acid activated and 93.57% for the calcinated sample.
Also, the characterization of both the original oil and the bleaching oil showed that the later has appreciable properties. Hence colour reduction was observable by naked eyes.
TABLE OF CONTENTSChapter one
1.0 Introduction
1.1 Preamble
1.2 Objective
1.3 Scope of study
2.0 Literature Review
2.1.0 Chemical composition of palm oil
2.1.1 Carotenes
2.1.2 Phosphatides
2.1.3 Gums
2.1.4 Compositions and standards of palm oil
2.2.0 Spoilage factors of palm oil
2.2.1 Preventive measures
2.2.2 Inhibitors
2.3.0 Refining of creebe palm oil
2.3.1 Degumming
2.3.2 Neutralization
2.3.3 Bleaching
2.3.4 Deodorization
2.3.5 Chemical bleaching method
2.3.6 Accretion bleaching
2.3.7 Bleaching by adsorption
2.4.0 Adsorption
2.4.1 Uses of adsorption
2.5.2 Physical adsorption
2.5.2 Chemisorptions
2.6.0 Adsorbents
2.6.1 Bauxite
2.6.2 Decolourising carbons
2.6.3 Gas-adsorbent carbon
2.6.4 Molecular screening activated carbon
2.6.5 Synthetic polymeric adsorbents
2.6.6 Silica Gel
2.6.7 Alumna
2.6.8 Bone char.
2.7.0 Charcoal
2.7.1 Properties of charcoal
2.7.2 Activated charcoal
2.7.3 Methods of charcoal activation
2.7.4 Properties of activated charcoal
2.7.5 Chemical properties of activated charcoal
2.7.6 Physical properties of activated charcoal
2.7.7 Uses of activated charcoal
CHAPTER THREE3.0 Experimental method
3.1.0 Materials
3.1.1 Material treatment
3.2.0 Charcoal activation using acid
3.2.1 Charcoal activation by heat treatment
3.3.0 Degumming of Palm oil
3.3.1 Neutralization
3.4.0 Bleaching of palm oil
3.4.1 Experimental set-up
3.5.0 Characterization of palm oil
3.5.1 Specific gravity
3.5.2 Iodine value
3.5.3 Free fatty acid
3.5.4 Saponification value
3.5.5 Esterification value
3.5.6 Process flow chart
CHAPTER FOUR4.0 Experimental result
4.1.0 Effect of bleaching sample
4.2.0 Effect of temperature on bleaching
4.3.0 Colour observation at absorbance
4.4.0 Concise table for characterization
CHAPTER FIVE5.0 Discussion
CHAPTER SIX6.0 Conclusion
CHAPTER SEVEN7.0 Recommendation
References
Table of nomenclature
Appendices
CHAPTER ONEINTRODUCTION
1.1 PREAMBLE
Palm oil is one of the various types of vegetable oils, belonging to the group called liquids, because of its fatty acids content.
The majority of the fats contains some colouring matter either as a natural constituent or discoloration produced during the processing. Natural pigments present in vegetable oils are mainly the carotenoid, giving yellow and red colours, and the chlorophylls which give green colours. Colour deterioration can also take place during the extraction process, especially in the local method of extraction used in the most parts of the Eastern region in Nigeria.
