ACTIVATED
BLEACHING EARTH
BLEACHING EARTH
Bleaching Earth is manufactured from the best quality, selectively mined and scientifically blended montmorillonite clays under stringent process controls. While making Bleaching Earth special care is taken in maintaining the important properties like absorptive capacity, acid properties, catalytic properties, ion exchange capacity and particle size distribution.
Bleaching Earth is manufactured by Dry process OR Wet process.
A Bleaching Earth is Activated adsorbent used for the general purpose of
- Decolourisation of animal, vegetable mineral oils and waxes
- Enhance stability of the Refined Oil.
Bleaching Earth is characterized by
- High bleaching efficiency
- Fast filtration rate
- Low oil retention
- Ability minimise the increase of free fatty acids
- Removing impurities like soap & trace metals without affecting appearance, flavour & nutritional properties of Oil
Important Points During Bleaching
- 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.
- Choice of Bleaching clay as per its characteristics.
- The total acidity (titrable acidity) of clay is expressed as mg of KOH/g of clay on a hot water extract.
- The Moisture content of Earth is vital as activity of clay depends on the evaporation of moisture from earth after its admixture with oil (15% max free moisture is desirable)
- The Particle size of Earth affects filtration & oils retention as per type of earth used & determines losses during bleaching process.
- Operations & maintenance of filters is very important during process.
- Treatment with Acid Activated Bleaching Earth in post-bleaching step removes traces of Nickel from hydrogenated oils (0.25-0.5% of earth used).
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.
BLEACHING EARTH APPLICATION
- Refining of Vegetable oils
- Refining of hydrogenated Vanaspati ghee oils, Margarine & shortening
- Refining of Animal Fats like tallow oil, fish oil, lard oil
- Refining of Mineral Oils like
- Insulating oil
- Rolling oil
- Lube oil
- Waste oil
- Industrial triglycerides and fatty acids used for paints, varnishes and soaps
- Paraffins and Waxes
- Decolourising by removing colour 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 Sulphuric acid, Tars acid, Sludge, Sulfonic acid etc.
- Other Applications like
- Bleaching of Sulphur
- In Effluent treatment plants
BLEACHING EARTH GRADES
In a short span of time, our Bleaching Earth has made a huge impact in the edible oil refining segment due to its high quality standards, global networks and cost-effectiveness.
Our Bleaching Earth Grade: Bleaching Earth of highest bleachability and filterability for difficult-to-bleach oil fats and oils such as Castor, Palm, Linseed, Rapeseed, Fish, Soyabean, Cottonseed, Rice Bran and Olive. It exhibits high performance in both Chemical and Physical refining of edible oil.
SPECIAL
GENERAL
SUPER
PHYSICAL PROPERTIES
Bulk density
0.6 gm/ml (± 0.1)
0.6 gm/ml (± 0.1)
0.6 gm/ml (± 0.1)
Moisture @ 110’c
15 max
15 max
15 max
pH ( 5 % suspension)
3 – 4.5
2.8 – 3.5
2.8 – 3.5
Residual Acidity (mgKOH/g)
2.5 (± 1)
2.5 (± 1)
2.5 (± 1)
Acidity (%H2SO4)
3 – 4.50.4 % max
0.4 % max
0.4 % max
GRANULOMETRY
Average Particle Size
20 – 30
20 – 30
20 – 30
Less than 5 microns
10.5 % max
20 % max
10.5 % max
Less than 90 microns
90 % min
90 % min
90 % min
BET Surface Area
250 to 300 m2/gm
300 to 325 m2/gm
300 to 325 m2/gm
Unmatched Advantages of OUR BLEACHING Earth
Higher Bleaching Efficiency
Effective removal of chlorophyll, carotenes and other coloring pigments.
Lower Dosage
Higher active surface area results in improved bleaching capacity using less quantity of clay.
Higher Absorbing Capacity
Effectively removes soap content, phosphatides, peroxides and metal traces due to large pore diameter, pore volume and surface area.
Toxin Free
Contains no mineral acids that can damage the oil.
Dioxin & Heavy Metals Free
Confirms to the FEDIOL standards of the EU.
Captive Reserves
Consistent supply of quality raw material from captive reserves estimated at 34 Million MT.
OUR PRINCIPALS
- BAJAJ EARTHS – INDIA
- AV CLAYTECH PVT LTD – INDIA
- EAST CHEM – CHINA
- TAIKO – MALAYSIA
- SUNNY – INDIA
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