The physicochemical properties and preparation methods of diatomite (3)

(9) Examples of organic modification of diatomite

After the original diatomaceous earth was purified, polydimethyldiallylammonium chloride (PDMDAAC) was used as the modifier to organically modify the diatomaceous earth to prepare a new type of organically modified diatomaceous earth.
Soil
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①Wash a certain amount of diatomaceous earth into the XZXC-15L double tank scrubber, add water to adjust to a mass fraction of 30%-40%, and add 0.
5% sodium pyrophosphate to scrub for 20 minutes after mixing.
The product is stirred and diluted to a mass fraction of 10%-15%, and then passed through a 100-mesh sieve to remove weeds, large particles of quartz and feldspar
.

②Acid leaching Acid leaching mainly uses the stability of SiO ₂ to acid and the instability of impurity elements to acid, so that Al ₂ O ₃ , Fe ₂ O ₃ , CaO, MgO and other clay mineral impurities in diatomaceous soil are generated Soluble salts can be filtered, washed, and dried to obtain diatomaceous earth
.

③Organic modification Use PDMDAAC as modifier to organically modify diatomaceous earth
.

[Technical Index] Domestic Reference Standard

American FCC standard

Related Links: Physical and Chemical Properties and Preparation Methods of Diatomite (2)