The most common filter aid which meets all requirements is diatomaceous earth or kieselguhr. The leading diatomaceous earth filter aid manufacturer with the largest and purest diatomaceous earth deposits in the world is Celite Corp. in Lompoc/California. In the State of Washington (USA), France, Spain, Mexico, Chile and in two plants in China Celite Corp. mines diatomaceous earth.
Celite diatomaceous earth filter aids are prepared from particularly high quality diatom deposits. Optimum clarification, even for slimy colloidal turbidities of less than 0.1 µ on the one hand and highest possible throughputs on the other hand are the conditions which must be met through the selection of the appropriate Celite filter aid.
Maximum purity and chemical inertness with a uniform quality of the Celite filter aids guarantee that the product to be filtered is not deteriorated in terms of chemical composition, taste or smell. (Diatomaceous earth is also the basic material for Celite specialties such as functional fillers, absorptive silicates, carrier materials for chromatographic work, catalyst carriers.)