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Quality Control
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manufacture, stringent control is exercised on following
properties of Refoil Bleaching Earth. |
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Bleaching Activity :
A hard to bleach oil, with known ffa and color is
treated with various dosages of Refoil Earth under
standard vacuum, temperature, contact time and stirring.
The colors are measured in Lovibond Tintometer and
the results are compared with standard earth results.
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Acidic property :
Measurement of residual free acid content as well
as pH value of water solution filtered out of the
Bleaching Earth are routine test with titration
method as well as pH meter and stringent standards
are maintained for the same. |
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Water content :
Moisture content is measured in a standard laboratory
drying chamber as well as by Karl-Fisher- titrations. |
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Particle - size distribution
: It is checked on standard sieves by
careful air stream sieving as well as on particle
size analyser. |
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Filtration property :
We have a standard, exhaustive, test method for
determining the filteration properties of our bleaching
earth. We filter oil under standard conditions of
temperature and pressure difference over an oil-wet-filter-cake.
Stringent standards are followed and maintained
to ensure fast filtration rate of Refoil Earth. |
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Oil Retention :
This is a supplementary test carried out in conjunction
with filtration test. It depends on activation and
particle size of Bleaching Earth and is maintained
at the minimum levels. |
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