The bleaching bentonite clay
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The bentonite clay, clay bleaching.
The granulated bentonite clay (the clay bleaching).
Natural oils and fats always contain the pigments painting them in specific color. So, the carotinoids which are present at oil give them coloring from yellow till red color, and a chlorophyll gives green coloring.
Cotton oil, except the listed pigments still contains gossypol and its derivatives which give in oils specific coloring, from brown till black color. And the purified oils and semi - finished products prepared on their basis should be light therefore there is a need of aftertreatment for decrease in chromaticity.
Additional adsorptive cleaning in addition to a basic purpose – removals of pigments, still solves not less important problems - destruction and removal from oil of products of oxidation, traces of phospholipids, removal of residual content of water and improvement of organoleptic properties of oil.
For the adsorptive purification of oil use the special activated bleaching clays received from natural bentonite clay previously having processed them mineral acids.
The granulated bentonite clay for use in preparation of the hydraulic insulating materials applied at construction of metro stations, gas pipelines, dams, benzo - gas - filiing stations is issued.
In the extractive industry the bentonite dry mud is widely applied. On the basis of this product solutions for drilling are made. Solution receives the unique properties thanks to the fact that the activated soda ash enriches raw materials - bentonite clay. The price of the modified clay of a domestic production is lower, than on the western analogs. Bentonite powder turns out as a result of drying and crushing of clay.
Bentonite modeling clay became it from the most demanded in the industry (the kind of underearth, maintains temperature to 1580'C). Its ability to hold a form in the crude and dried look, gas permeability, high binding properties and glutinosity has found broad application in metallurgy. There is enough introduction of only 5% of this mineral to make forms of special durability.
In construction in quality gidro - and heat insulations use materials for as which raw materials serves bentonite clay. It is possible to buy similar products and for private construction. On the basis of bentonite solutions which are applied in the tunneling which is carried out by the GNB method are made.