History Of Bleaching Earths

For many years natural Bentonite and related materials were used to purify vegetable oils and animal fats, to make them more palatable and to increase their shelf life.

In the early part of the 20th Century, scientists in Europe discovered that they could improve certain performance aspects of the natural Bentonites by the process of acid leaching of the natural mineral. Since that time, the performance capabilities of bleaching earths have been improved significantly, and to such a level that high-performance acid-activated bleaching earths are now the preferred agent for the purification and bleaching of most edible and technical oils, of animal, vegetable and mineral origin.