SORBENT-ACTIVATOR FOR PURIFICATION OF OIL-CONTAMINATED SOILS AND GROUNDS AND METHOD FOR PRODUCTION THEREOF Russian patent published in 2017 - IPC B01J20/24 B01J20/20 B01J20/30 

FIELD: chemistry.

SUBSTANCE: sorbent-activator is provided, which is a carbon nano-silica composite obtained from a mixture of shungite and rice husk at a weight ratio of 6 parts of shungite per 1-24 parts of rice husk. The preparation process includes heating of rice husk and shungite mixture in the reactor to a temperature of 150°C±10°C, followed by mixture dehydration and carbonization. Dehydration is carried out with the initial temperature of 150°C±10°C, gradually raising it at a rate of 5°C±1°C per minute up to 200°C±10°C, and upon reaching 200°C±10C°, the temperature is maintained until complete evaporation of water from the mixture. Mixture carbonization is carried out in argon or nitrogen medium with gradual temperature rise from 200°C±10°C to 400°C±20°C. The resulting product is ground in a ball mill, washed with water and dried.

EFFECT: invention improves the efficiency of oil and oil products biodegradation in soil and ground and allows sorbent-activator application in regions with low temperatures.

2 cl, 4 tbl