Diatomaceous earth, also known as Kieselgur, consists of the very fine silicon skeleton of dead diatoms. Because of its natural structure, diatomaceous earth has a very large surface, is chemically inert and has a very high absorption capacity. We offer natural diatomaceous earth whose content of crystalline silica is < 0.1%, calcined diatomaceous earth and flux-calcined diatomaceous earth (fluxing agent: sodium carbonate). We also have high-purity diatomaceous earth in our product portfolio which complies with USP/NF requirements.
Our diatomaceous earth mainly comes from deposits in the USA, Mexico and Spain.
Life science applications
Our coarse-grained diatomaceous earth grades are very well suited for the use as peeling particles in creams. The grades tested in accordance with USP/NF are the ideal filling material for food supplements, particularly tablet pressing, because of their high SiO2 content of 89-99%.
Dental impression material
Because of its high water absorption capacity of approximately 200 g/l, our diatomaceous earth products guarantee rapid mixing behaviour of the impression mass and short setting phases.
Diatomaceous earth products with a very high Blue Light Reflectance of approximately 95, high water absorption capacity of > 200 g/l and a surface (BET) of around 2 m²/g are extremely well suited for the use as functional fillers, among other things for the production of decorating paper.
The sharp-edged diatom structures cut their way through the exoskeleton of, for instance, ants which then dry out. Our natural diatomaceous earth grades with a crystalline silica content of < 0.1% are safe for children and pets, too.
Our natural, uncalcined diatomaceous earth products with a low specific content of Al2O3 and Fe2O3 are extremely well suited for the use as catalyst carriers, for instance for nickel, cobalt, copper, sulphuric acid and also for the food industry (fat catalysts).
Our heat-resistant, very light diatomaceous earth grades with an apparent density of approximately 120-140 g/l are ideal functional fillers for the production of refractory materials, heat insulating boards and fireproof boards.
By means of defined particle distribution with an average size of approximately 8 µ, our readily calcinated diatomaceous earth grades are excellent inert materials for centrifugal casting.
Your contact: Nicola Hintze, Tel.: +49 40 44197-334, Nicola.Hintze(at)lehvoss.de