COMPOSITE AMELIORATIVE MATERIAL Russian patent published in 2014 - IPC C09K17/40 C09K17/06 C09K17/10 

FIELD: chemistry.

SUBSTANCE: composite material contains drilling wastes, portland cement in amount of 5-10% of the volume of the drilling wastes, technical carbon 0.5-1% of the volume of drilling wastes, quick lime 3-5% of the volume of drilling wastes, peat 20-40% of the volume of drilling wastes, sand 10-30% of the volume of the drilling wastes, phosphorus-containing mineral fertiliser 20-30 kg per ton of the composite material. The phosphorus-containing mineral fertiliser can be diammonium phosphate, ammonium nitrate phosphate fertiliser, ammophos with potassium sulphate or potassium chloride in ratio of 70:30 wt %, diammophos with potassium sulphate or potassium chloride in ratio of 70:30 wt %. The composite material further contains hydrocarbon-based spent or unused drilling fluid with hydrocarbon content of 3-5% of the volume of the drilling wastes.

EFFECT: use of the present composite material provides effective recultivation of disturbed soils while recycling hazardous drilling wastes and improves the environment.

8 cl, 3 ex