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Nowadays, oil factories use large quantity of activated bleaching
earths as they have found no other substitution for them, for this
very reason we have been always tying to improve our quality
Bleaching
Earth has found significant application in
-
Decolourising by removing color pigments like
carotenoids, chlorophyll, pheophytine.
- Removal
of gums (phospholipids), ffa and soap contents and traces
of heavy metals in vegetable oils.
- Reducing
and controlling different oil parameters like peroxide value,
anisidine value, uv-absorption value, ffa contents etc.
- Purification
of aromatic compounds in case of mineral
oils & waxes and removal of sulfur, acid - tars, acid - sludge,
sulfonic
acid etc.
Application
of bleaching bleaching Earth
Broadly speaking, bleaching Earth finds use in following fields.
1. Refining of Vegetable oils like :
Cottonseed, Soyabean, Sunflower, Rapeseed, Mustard, Peanut, Coconut,
Corn, Olive, Ricebran, Palm, Palm-kernel, Linseed, Castor, Jajoba
& Canola oils.
2
Refining of hydrogenated vanaspati ghee oils, Margarine & shortening.
3.
Refining of Animal Fats like tallow oil, fish oil, lard oil.
4.
Refining of Mineral Oils like :
- paraffins and waxes
- insulating oil
- rolling oil
- white oil
- waste oil (lubricating oil)
- industrial triglycerides and fatty acids used for paints, varnishes
and soaps.
5.
Other applications like :
- solvents (for dry cleaning)
- bleaching of sulphur
- effluent treatment plants
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