Diatomaceous earth is the remains of diatoms. Diatoms are very tiny algae that exist in large amounts in nature. Under certain special conditions, their wills will be enriched and naturally deposited to form macroscopic soil-like substances. Let's learn about diatomite together.
What is diatomaceous earth?
Formula: SiO2
Molecular Weight: 60.08
CAS No.: 61790-53-2 Diatomite is a siliceous rock that is mainly distributed in China, the United States, Denmark, France, the Soviet Union, and Romania. China has a diatomite reserve of 320 million tons and a long-term reserve of more than 2 billion tons. It is mainly concentrated in the eastern and northeastern regions of the country. Larger scales and more work are performed in provinces such as Jilin, Zhejiang, Yunnan, Shandong and Sichuan. Although widely available, high-quality soils are only concentrated in Jilin Changbai and Yunnan diatomite mining areas, and their resources are particularly abundant. Most of the other deposits are grades 3 to 4 because of high impurity content and cannot be directly processed and utilized.
Diatomite consists of amorphous SiO2 and contains a small amount of Fe2O3, CaO, MgO, Al2O3 and organic impurities. Diatomaceous earth is usually light yellow or light gray, soft, porous and light. It is commonly used in industry as insulation material, filter material, filler, abrasive material, water glass raw material, decolorizing agent and diatomaceous earth filter aid, catalyst carrier. Wait.
Diatomite decoloring method
Decolorization of diatomaceous earth is now generally used in pickling and roasting, and in the current industry, in order to further improve the product effect, activated carbon is also added to ensure that the colored substances in the solution and other products have a negative impact on the quality of the product. The material was completely absorbed. The proportion of diatomaceous earth and activated carbon can be referenced from 0.2% to 0.3% of the articles. In general, stirring it for ten minutes to fifteen minutes completely removes substances that have a negative effect on the product. Many people use the simplest resin method to decolor non-white diatomite. However, this method is not actually used. It is prone to problems and does not achieve the desired results. Therefore, it is recommended that everyone should not be afraid. The trouble is still carried out by pickling and roasting methods, and there are also professional equipment on the market to buy, and the price is fair.
The origin of diatomite
Diatomite consists of amorphous SiO2 and contains a small amount of Fe2O3, CaO, MgO, Al2O3 and organic impurities. Diatomaceous earth is usually light yellow or light gray, soft, porous and light, commonly used in the industry as a heat preservation material, filter material, filler, abrasive material, water glass raw material, decoloring agent and catalyst carrier. The special porous structure of natural diatomite can be observed under the microscope. This microporous structure is the reason why diatomite has characteristic physicochemical properties.
Diatomaceous earth is a kind of fossil diatom accumulation deposit formed after a unicellular plant called diatom has been deposited for about 1 to 20,000 years after death. Diatoms are one of the first living organisms that appeared on the earth and live in seawater or lake water. It is this diatom that provides oxygen to the earth through photosynthesis and promotes the birth of humans, animals and plants. This diatomite is formed by the remains deposition of a single-celled aquatic plant diatom. The unique feature of this diatom is that it can absorb free silicon in water to form its skeleton, when it is over, it is deposited under certain geological conditions. Diatomite deposits are formed. Diatom mud has some unique properties, such as: porosity, lower concentration, larger specific surface area, relative incompressibility and chemical stability, through the pulverization, sorting, calcining, airflow classification of the original soil. After the processing steps, such as removing impurities, changing the particle size distribution and surface properties, it can be applied to various industrial requirements such as coating paint additives.
Summary: The above is the content of the diatomite decoloring method and the origin of diatomite introduced by Xiaobian. We hope that we can effectively help everyone. For more information, please pay attention to this site.
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