METHOD OF COMBINED PRODUCTION OF ALUMINATES OF CALCIUM AND PHOSPHORUS Russian patent published in 2010 - IPC C01B25/27 C01F7/16 

FIELD: chemistry.

SUBSTANCE: invention can be used in production of aluminate cement, portland cement and synthetic slag, fertilisers, detergents and thermal phosphoric acid. A mixture is prepared from calcium phosphate powder as an oxidising agent and aluminium metal as fuel. The mixture is loaded into a closed reactor, heated until initialisation of the self-propagating high-temperature synthesis (SHS) reaction and combustion conditions are maintained until the end of the reaction. The solid product is a mixture of oxides of calcium and aluminium.

EFFECT: invention enables production of calcium aluminates and phosphorus gas from calcium phosphate in a single step, where the phosphorus gas can be used to obtain end products without additional purification.

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