METHOD FOR PREPARING ALKALINE METAL HUMATES Russian patent published in 2006 - IPC C05G1/00 C05F11/02 

FIELD: agriculture, chemical technology.

SUBSTANCE: invention relates to technology for preparing humin fertilizer from solid fuel minerals. Method for preparing alkaline metals humates involves ultrafine grinding of coals comprising humic acids in mixture with chemical addition agent comprising alkaline metals compounds with additional addition of oxidant, for example, potassium permanganate in the ratio to coal = (0.04-0.05):1 to a mixture feeding for grinding, and chemical addition agent is fed to the technological process for two steps: at the first step during grinding with coal and oxidant sodium and/or potassium carbonates are added, and at the second step - at stirring up to preparing the uniform mass with product obtained after grinding potassium and/or sodium hydroxides are added. Then the prepared uniform mass is treated with a plasticizer and wetting agent under pressure = (3 x 10⁵)-(4 x 10⁵) Pa. Method provides increasing the main substance in ready product and preparing non-dusty lumped product suitable for package, transporting and addition in soil.

EFFECT: improved preparing method of humates.

7 cl, 1 tbl, 1 ex