INTRODUCTION:-
CHEMPRO
has served the
edible oil industry since a decade,
starting off as a small engineering
company offering customized solutions for
all aspects of edible oil refining. We
through our unique and individualized
approach offered cost effective upgrades to
help our clients meet quality requirements
or market change with substantial savings in
time and money. We have offered plants for
refining various vegetable oils like
cottonseed, rapeseed(mustard), sunflower,
coconut, corn, palm kernel, palm, castor and
also recently installed plants for
separation of fish oils and also refining of
the same.
Process-Edible
Oil Refining
PROCESS
DESCRIPTION:EDIBLE OIL REFINING
The
process of EDIBLE OIL REFINING in general
comprises of
Degumming, Neutralization, Bleaching
and Deodorization and Winterisation.
Chemical refining is the traditional method
whereby the free fatty acid of the crude
oils are neutralized with Caustic Soda. The
resultant Sodium Soaps are removed by Batch
Settling or by means of Centrifugal
Separators. The neutral oils are
subsequently bleached and deodorized. This
method can be used for reliably refining
virtually all crude oils, including oils of
low quality, with the exception of Castor
Oil.
In
all alternative method of edible oil
refining of Physical refining, the free
fatty acids are removed by distillation in
one stage of deodorizing. A fundamental
criterion for using this method is that the
crude oils should be degummed as effectively
as possible, however this is only possible
to a limited extent with some crude oil
qualities. Other oils for instance
cottonseed oil or fish oils, are
fundamentally not suitable for Physical
Refining.
Degumming
:-
The
Edible Oil Refining process depending on
types of Phosphatides either water degumming,
Acid Degumming, or Superdegumming is carried
out so as to yield Phosphorous contents of
less than 10ppm.
Neutralization
: -
Here
the predegummed oils or oils with very low
phosphatide contents are saponified with
Caustic Soda and the Sodium Soap is
separated. The oil is initially heated to
the optimum process temperature. In order to
condition the non-hydratable phosphatides, a
small quantity of concentrated phosphoric
acid is added and intensively mixed with
oil. Following a brief reaction time,
diluted caustic soda is added in order to
neutralize the free fatty acid and the
phosphoric acid. After mixing with the oil,
the mixture is either conveyed directly to
the first separator or it passes through a
further reaction tank. The latter is
recommended only for oils with a relatively
high phosphatide content in the neutral oil
is still too high for the subsequent process
stages, and it must therefore be reduced
further by one or two washings. For this
purpose hot water is added to the oil,
intensively mixed and the soapy wash water
is removed in a further separator. In
general one wash stage is adequate. A second
washing is only necessary if very low
residual soap contents are required.
Recently
to reduce the water consumption in Edible
Oil refineries we have pioneered the use of
Silica Adsorbents for removal of residual
soaps after neutralization. Upto 1000 ppm
soaps are removed by sequential addition of
silica adsorbent under presence of moisture
at 65 C. The dosage of the silica adsorbents
may vary from 0.1 to 0.2%.The silica
adsorbents further also pick up polar
impurities in oil and also gums to give a
better edible oil in subsequent processes.
Bleaching
:-
For
Edible Oil Refining - The unique CHEMPRO
SOFT- BLEACH
Bleaching system gently removes
residual Phosphatides , metals , soaps and
oxidation products in addition to colouring
matter.
The
washed and Neutralized oil is preheated and
fed to the Bleacher through the Cascade
Vacuum Dryer. Bleaching earth and activated
carbon is added to the oil through the
dosing unit which is controlled by a
programmable controller. The Bleacher
Proprietary designed with internal
partitions and set of high efficiency
turbine agitators to avoid short cycling and
provide necessary retention time before
filtration. The conjunction of vacuum dryer
with a bleacher is what is unique about SOFT
BLEACH where by oil going to the bleacher is
thoroughly dried and deaerated in the
cascade vacuum dryer and also the fugitive
particles from the bleacher sucked under
vacuum are scrubbed by the down coming oil.
The bleached oil from the Pressure Leaf
Filters transferred to the bleached oil tank
for intermediate storage.
For
Edible Oil Refining CHEMPRO has a unique
advantage of deep knowledge of the sorption
processes
and understanding of surface
phenomenon of various grades of Fullers
Earths derived from attapulgite, sulfuric
and hydrochloric Activated Earths derived
from montmorillonite, Steam
Activated Carbons and Chemically
Activated Carbons. This makes them
understand the bleaching process not
superficially for removal of colour
but also as a tool to remove
undesirable toxic residues like pesticides,
heavy metal, mineral oil traces.
Deodorization
:-
For
Edible Oil Refining -The CHEMPRO COMPACK
DEODORIZER is based on Thin Film counter
current Distillation Technology which
drastically reduces steam consumption to
less than half of what one would use in a
conventional tray Deodorizer. The bleached
oil from intermediate processed is heated
regeneratively with outgoing Deodorized oil
and heated in a Deaerator by thermal oil.
The hot oil flows by gravity either to a
packed column or a tray column or through
both of them in series. The oil is then
cooled regeneratively and then by water.
The
COMPACK DEODORIZER handles the most
demanding of processing needs for a variety
of feedstock, in the most efficient manner
besides being gentle on the oil.This ensures
an extremely high steam to oil interfacial
surface without the buildups or stagnant
zones. Fatty acid removal occurs instantaneously
and hydrolysis is avoided. Lower temperature
and lower residence times result in lower
trans-fatty acid formation.
The
COMPACK DEODORIZER is available in variants
like single column and split column design
where by the packed column and tray column
are in series or in parallel respectively.
The advantage in the latter being
flexibility to use only the tray column by
passing the packed column if need arises.
Besides the other options available are
final heating and cooling under vacuum. The
superior scrubbing equipment featuring
structured packing and strategically placed
De-misters insures minimal carry over of the
fatty acid to the hot well.
motorcycles
Counter |
|
Powered
By WebPro
Technologies.
