A Brief Introduction and Some Useful Information About Diatomite Decolorization

Food Grade Diatomaceous

Diatomaceous earth is actually formed by the accumulation of layers of remains of ancient diatom plants 

and other single-celled organisms. Generally, diatomaceous earth tends to be white, such as white, gray, gray, etc., because its density is generally only 1.9 to 2.3 per cubic meter, so its internal structure has large voids, and its porosity reaches 100% when dry Ninety or so, so diatomaceous earth is easy to grind into powder. Therefore, diatomaceous earth bought on the market is generally in powder form.

Since the main forming object of diatomaceous earth is diatom, it mainly exists in Shandong, Jiangxi, Yunnan, Sichuan and other places with sufficient water. Moreover, coupled with the diversity of diatomite processing methods, there are many varieties of diatomite products. Today, the market is mainly divided into three types: montmorillonite, white clay, and attapulgite.

As for the decolorization of diatomite, pickling and roasting are generally used, and in today’s industry, in order to further increase the effect of the product, activated carbon will be added to ensure the colored substances in the solution and other negative effects on the quality of the product. The substance was absorbed.


The ratio of the amount of diatomaceous earth to activated carbon can refer to 0.2% to 0.3% of the article. And under normal circumstances, mixing it for ten minutes can solve the substances that have a negative impact on the product. Many people use a simple resin method when decolorizing non-white diatomaceous earth, but in fact, this method is not used, it is prone to problems, and does not achieve the expected effect, so it is recommended that you not be afraid of trouble , It is still carried out by pickling and roasting, and there are also equipment on the market to buy, and the price is fair.

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