ZINC-CONTAINING ORGANOMINERAL FERTILIZER MANUFACTURE PROCESS Russian patent published in 2004 - IPC

FIELD: mixed fertilizers.

SUBSTANCE: invention relates to manufacture of organomineral fertilizers rich in trace minerals, in particular zinc, ensuring elevated environmental resistance of plants, increased fecundity of fruit and citrus trees as well as majority of crops. Process according to invention comprises treating hydrolysis lignin with neutralization agent, which is synthetic fiber production waste. Neutralization agent is synthetic fiber production liming slime. Hydrolysis lignin is treated on ball mill wherein orthophosphoric acid is added to material to be treated using 3.5-4.25 wt parts lignin per 1 wt part slime (as dry material). Amount of orthophosphoric acid (as crystalline material) is 1.48 kg per 1 kg dry slime, acid being preliminarily dissolved in water to concentration 25-45%.

EFFECT: improved quality and nutritive capacity of fertilizer.

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