Tonsil

Coloring soil or tonsil is an active soil for purifying and bleaching various types of industrial oils with a lower percentage of consumption, up to 50% of the ordinary one as well as bleaching of various types of liquid and solid oils, trans-oil and the second stage of vaseline treatment, and due to the fact that bleaching temperature of this active soil type is low ,it is suitable for bleaching a variety of petroleum products with a low flammability point. Tonsils are usually made of Palygurskite (Attapulgite) or Bentonite. The use of these soils in the treatment of colored wastewater is economically more appropriate than other color removal methods. The percentage use of this type of soil is different to the type of base oil and the color to be used for extraction, for example, for transformer oil 1 to 2% and for different types of paraffins, it varies from 3 to 8%.

The modern use of tonsil is including absorbent for oil, grease, and animal wastes (cat litter), as a carrier for pesticides and fertilizers and its minor use is including filters and as a filler in paint, plaster, adhesive, and medicine.