Brief introduction of Diatomite Minerals2018-09-21
Molecular formula (Formula): SiO2
Molecular weight (molecular Weight): 60.08
CAS No.: 61790-53-2 diatomaceous earth is a siliceous rock, mainly distributed in China, the United States, Denmark, France, Romania and other countries. China's diatomite reserves 320 million tons, the long-term reserves of more than 2 billion tons, mainly concentrated in east and northeast China, in which large scale, more work done in Jilin, Zhejiang, Yunnan, Shandong, Sichuan and other provinces, although the distribution is wide, but high-quality soil concentrated in Jilin Changbai, Yunnan diatomite Mining area, especially rich resources, Most of the other deposits are $number-grade soil, because of high impurity content, can not be directly deep processing and utilization.
Diatomite consists of amorphous SiO2 and contains a small amount of $literal, CaO, MgO, $literal and organic impurities. Diatomite is usually light yellow or light gray, soft, porous and light, industrial commonly used as insulation materials, filtration materials, fillers, abrasive materials, water glass raw materials, bleaching agents and diatomite filter aids, catalyst carriers.
The special porous structure of natural diatomite can be observed under microscope, which is the reason of the characteristic physicochemical properties of diatomite.
The main component of Diatomite as carrier is SiO2. For example, the active component of industrial vanadium catalyst is $literal, the catalyst is alkali metal sulfate, and the carrier is refined diatomite. The results showed that SiO2 had a stabilizing effect on active components and increased with K2O or na2o content. The activity of the catalyst is also related to the dispersion of the carrier and pore structure. After the diatomite is treated with acid, the oxide impurity content is reduced, the SiO2 content is increased, and the specific surface area and pore are also increased, so the carrier effect of the refined diatomite is better than the natural diatomite.
Diatomite is usually formed by the silicate remains after death of unicellular algae collectively known as diatoms, and its essence is the amorphous SiO2 containing water. Diatoms in freshwater and salty water can survive, a lot of species, generally can be divided into "central" diatoms and "plume" diatoms, each eye, and many "genera", quite complex.
The main components of natural diatomite are SiO2, high quality color white, SiO2 content often exceeds 70%. Single Diatom colorless transparent, the color of diatomite depends on clay minerals and organic matter, the different source of diatomite different components.
Diatomaceous earth is a kind of fossil diatom deposit which is formed by the accumulation period of 1 to 20,000 years after the death of unicellular plants called diatoms. Diatoms are one of the first native organisms to exist on Earth, living in seawater or in lakes.
The Diatomite is formed by the remains of a single-celled aquatic plant diatom, which is unique in that it absorbs the free silicon in the water to form its skeleton and, when its life is over, to form a diatomite deposit under certain geological conditions. It has some unique properties, such as: porous, low density, the larger specific surface area, the relative compressibility and chemical stability, can be applied to various industrial requirements, such as paint additive and so on, when the particle size distribution and surface properties are changed by crushing, sorting, calcination, airflow grading and impurity processing.