activated bleaching earth for edible oil and fat refining
Activated clay was made by bentonite as raw material which main
component is montmorillonite, we produce activated bleaching earth
by the production processes of activation treatment using inorganic
acid, rinsing, drying and mills. It is light gray or light pink
powder without any mechanical admixture. The quality of our product
exceeds the national standard due to our high performance, strong
decolorization ability and fast filtration speed. It is widely used
in many fields such as oil & fat, daily chemicals(soap)
,petrochemical (lube oil, paraffin, naphthenic acid) and medicine
1.high bleaching ability
2. Low oil residual
3. Fast filtration rate
4. Ability minimise the increase of free fatty acids
5. Removing impurities like soap, trace metals
1) Decolorization of plant oils:
Fullers earth could be work for soyabean oil,corn oil,palm
oil,coconut oil, sunflower oil,peanut oil, cotton seed oil,olive
oil, rice bran oil, castor oil, linseed oil, tung oil, rapeseed
2)Decolorization of mineral oils:
Used lubricants oil,motor oil,engine oil,automative oil, paraffin
3) Juice and wines' clarifying.
4)Medicine and environmental industries: Antidote and adsorbing
materials, waste water treatment. 5) Enhance stability of the
Important Points During Bleaching
1)Normally about 0.5%- 3% of earth is required for bleaching
application of vacuum during process which results in less
oxidation & improvement
in oil colour.
2) Choice of Bleaching clay as per its characteristics.
3) Total acidity (titrable acidity) of clay is expressed as mg of
KOH/g of clay on
a hot water extract.
4)Moisture content of Earth is vital as activity of clay depends on
the evaporation of moisture from earth after its admixture with oil
(10 % max free moisture is desirable)
5)The Particle size of Earth affects filtration & oils
retention as per type of earth used & determines losses during
6) Operations & maintenance of filters is very important during
7)Treatment with Acid Activated Bleaching Earth in post-bleaching
step removes traces of Nickel from hydrogenated oils (0.25-0.5% of
Oil Loss Economics During Bleaching
Spent Earth carries around 30% of oil on dry basis by hot water
washing of filter press, the oil content can be brought down to 22%
on the average.
1. pp woven bag or upon request
2. inner bag is polyethylene film bag,outer bag is plastic woven
3. n.w.: 20kgs/bag, 25kgs/bag, 1000kgs/bag.
5. printing: ODM&OEM
6. size 45(+-5)*75(+-5)cm--25kg
After years of practice and test, our R & D team has developed
full set of advanced formula and production technology to produce
different products of food grade and industry grade for meeting
customer different needs.
How to do lab test with Free Sample?
1. Remove water
Heat the oil to be 70- 80 celsius then stop.Place it still for
Remove the surface water.Reheat it slowly to be 120celsius.
Keep this temperature till the oil do not boil and appear black gas
from the oil.
2. Wash the oil with sulfuric acid(concentration:92%-98%)
Stir the normal temperature oil,meanwhile,adding the (5-7%)sulfuric
slowly.After that,keep stiring for 30minutes.Place it still ,till
the dreg subside
completely.Then filter it.
3. Wash the oil with Na2CO3
Reheat the oil to be 80 celsius.Stir,meanwhile adding Na2CO3 into
When the ph is 7,place it still till all dreg subside,then filter
4. Adding activated clays
Heat the oil to be 105-110celsius.Keep that temperature.Stir
adding 10-15% activated clay.
5. After that,keep stiring 30 minutes.Then place it still until all
Then filter it.