Shaffaf (Bleaching Earth)
De-coloring of vegetable oil, fats and mineral oils has remained in practice for centuries. Raw material used consists mainly of Bentonite Clay or Montmorillonite, which has little or no decolorizing property in raw state. By treatment with acid, the bleaching power has considerably exceeded that of natural clay. This characteristic is developed due to surface alter, and important changes in its chemical or physiochemical nature.
Term “BLEACHING” is reserved for the treatment designed solely to reduce the color of the oils. The standard method of bleaching by using Activated Bleaching Earth is based on bleaching by adsorption. In addition to its power to remove Red and Yellow pigments, Acid Activated Bleaching Earth is also quite effective in removing Phosphatides and various mucilaginous materials present in most of the oils, referred to commonly as “Gum” or “Slime”.
Ittehad Chemicals Limited is the pioneer in introducing the “Acid Thermal Activated Bleaching Earth”, in Pakistan. ICL, through the efforts of its competent technical professionals and continuous research, have succeeded in developing “Acid Activated Earth” from the indigenous raw-material, which is strongly competing with the imported “Bleaching Earths” available in the Market
| Shaffaf (Bleaching Earth) Specification |
| Free Moisture (at 110oC ) % Max. |
2.7 |
| Loss on Ignition (at 1000oC) % Max. |
2.7 |
| Bulk Density: |
|
| - Loose g/litre |
300 - 370 |
| - Tapped g/litre |
400 - 500 |
| pH (10% Aquous Slurry) |
3 - 4 |
| Particle size: |
|
| Through 100 Mesh % Min. |
96 |
| Through 200 Mesh % Min. |
84 |
| Through 250 Mesh % Min. |
76 |
| Bleachability: |
70 – 75 |
| tested on fresh neutralized and refined (de-gummed and de-hydrated) soya bean oil % |
70 – 75 |
| Acidity as HCL % less than. |
0.05 |
| Oil Retention % Max. |
35 |
| Filterability (minutes) |
40 |
PACKING:
In order to ensure the quality of the product during shifting, storage, and transportation to the customers, ICL has selected a packing material of international standard in strength and quality with printed woven Polypropylene bags having inner liner of high density Polyethylene. The packaged product is available in 25 kg bags.
APPLICATIONS:
“SHAFFAF” (Acid Activated Bleaching Earth) has excellent bleaching properties and helps in achieving the desired color values at considerable reduced production costs.
For the bleaching of:
- Edible / cooking oil / vegetable oil.
- Lubricating oil
- Mineral oil
- Fat in soap manufacturing
Material Handling:
Should be kept in a well ventilated and covered area. Avoid contact with other chemicals, especially all acids.
