METHOD OF PRODUCING INORGANIC CHROMATIC PIGMENT Russian patent published in 2012 - IPC C09C1/24 C01G49/02 C02F1/52 C02F103/02 

FIELD: chemistry.

SUBSTANCE: production wastes are dried and ground to the required fineness. The production wastes used are in form of sludge from clarification tanks of thermal power stations formed during liming and coagulation of raw water on a water treatment plant. The sludge is dried at temperature 200-250°C for 3-3.5 hours.

EFFECT: method enables to obtain a cheap inorganic chromatic pigment, reduces the cost of paint materials by simplifying the process of producing the pigment and using readily available and cheap production wastes, which enables to solve the problem of recycling sludge from clarification tanks of thermal power plants.

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