NEW PHOSPHATE FERTILIZERS BASED ON ALKANOLAMINE SALTS OF PHOSPHORIC ACID Russian patent published in 2022 - IPC C05B15/00 C05B11/10 C05D9/02 C05G3/00 

FIELD: agriculture.

SUBSTANCE: invention relates to fertilizers. Aqueous composition for use as an ammonia-free fertilizer contains an alkanolamine salt of phosphoric acid and at least a complex of an alkanolamine and a metal, wherein at least the alkanolamine and metal complex is not a complex of an alkanolamine and a metal phosphate selected from a group, consisting of a complex of ethanolamine and zinc phosphate, a complex of ethanolamine and manganese phosphate, a complex of ethanolamine and chromium phosphate, and a complex of ethanolamine and calcium phosphate. Molar ratio of phosphoric acid to monoethanolamine in the monoethanolamine salt of phosphoric acid ranges from 3:1 to 1:3. Total content of P₂O₅ in the composition ranges from 5 to 40 wt. % (wt./wt.) based on the total weight of the aqueous composition. Alkanolamine and metal complex is selected from a group consisting of complexes of boron and ethanolamine, copper and ethanolamine, zinc and ethanolamine, and iron and ethanolamine.

EFFECT: proposed aqueous composition for use as a phosphate fertilizer, which does not contain ammonia, has a high content of phosphorus, is safe for crops, mixes well with other fertilizers and is suitable for any type of application into soil.

12 cl, 2 tbl, 3 ex