METHOD OF PREPARING HUMUS FERTILISER Russian patent published in 2010 - IPC C05F11/02 

FIELD: chemistry.

SUBSTANCE: peat is mixed with a potassium or sodium hydroxide solution with concentration of 3.5-4.5 g/l in weight ratio of 1:2.5-1:10. The obtained mixture is stirred for 2-3 hours at 70°-90°C and the obtained potassium or sodium humate solution is mixed with 15-25% zinc sulphate solution. The obtained mixture is heated to 80°-100°C and held at that temperature for 10-14 hours. The zinc sulphate solution is separated and the formed zinc humate precipitate is deposited on a filter, dried in a drier and then ground in a mill to the required fraction.

EFFECT: obtaining water-insoluble humus fertilisers which are an effective catalyst for plant growth, increase yield of plants, promote reduction of nitrates in the soil, can accumulate and restore humus, and are denitrophenolisation agents, inhibitors of insecticide activity of nitrophenols of subsurface soil which inhibit growth of plants.

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