Transcription of OILS AND FATS
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OILS AND FATS
oils AND fats GLOSSARY ACIDITY: Free fatty acids have, as the name implies, a weak acidic nature. There will be a naturally occurring level of these present in each oil and levels can be further increased by hydrolysis (water breakdown) of triglyceride. The level of acidity may be expressed in several ways (please refer to Acid Value and Free Fatty Acids). ACID OIL: Acid oil is a general term for a by-product obtained from the alkali refining of oils and fats . During alkali refining the free fatty acids are neutralised with alkali and this soapstock containing some emulsified neutral oil is separated.
are removed from oils and fats by adsorptive cleansing using bleaching clays and/or activated carbons. Bleaching is carried out on highly degummed oils, or acid pre-treated oil in the case of oils of naturally low gum contents, when these are to be physically refined.
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