Process
Activated Fuller’s Earth used in the
contact process employed for decolorizing oils, greases and waxes
is in the powder form. It highly improves its Tintometer readings.
CONTACT PROCESS CLAY
Contact filtration process: Contact filtration
is the direct agitation of a mixture of a very fine clay and
oil, usually at elevated temperature, for a definite period of
time to accomplish a desired result.
Bleaching: The selective removal of pigments
from oils and fats by adsorption on clay, specially chosen and
activated for specific effects is a term known as bleaching.
To know more click here
PERCOLATION PROCESS CLAY
Activated Fuller’s Earth is also used
in the percolation filter process is in the granular form, this
process is usually used for light colour oils like base oil distillates,
mainly to improve it UV and PNC values.
PERCOLATION: The term ‘percolation’ is
given to that method of filtering in which the oil to be decolorized
is passed through a bed of granular adsorbent aided via the help
of gravity.
FILTRATION: Filtration is the general term
applied to the process of removing colour and suspended matter
from base stocks for specialty products. To know more click here
|
