METHOD OF PRODUCING CANAPHITE Russian patent published in 2013 - IPC C01B25/32 C01B25/42 C01B25/45 A61L27/10 A61L27/12 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing canaphite, i.e. a hydrated disodium pyrophosphate of calcium (Na₂CaP₂O₇*4H₂O). The method involves feeding starting components: water, a crystalline hydrate of sodium pyrophosphate, calcium acetate or a crystalline hydrate of calcium nitrate, in molar ratio of the crystalline hydrate of sodium pyrophosphate to calcium acetate or crystalline hydrate of calcium nitrate of 0.98-1.02 and ratio of the mass of water to mass of the produced canaphite of 0.7-0.8. Said components then react while mixing intensely in a planetary mill at a rate of 5000-7000 rpm for 1-3 hours. The obtained product is then washed with water 4-6 times and disaggregated.

EFFECT: method enables to obtain single-phase canaphite powder with particle size in the range of 100-500 nm with high output of the end product.

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