FIELD: chemistry.
SUBSTANCE: invention relates to agriculture. The method of producing a complex slow-acting fertilizer based on urea-formaldehyde resin, thus, to intensify manufacturing and improve agrochemical properties of fertilizer contains the following: the sewage containing dissolved formaldehyde and urea-formaldehyde resin is added with orthophosphoric acid until pH = 2,0, then introduced with urea in mole ratio of formaldehyde to urea of 1.0: 1.5. The resulting mixture is held for 3.5-4.0 hours. The resulting polymer is filtered off and dried in vivo. And then it is mixed with ash, considering that the content of K2O is 10 wt %.
EFFECT: invention ensures to obtain a slow-acting complex fertilizer based on urea-formaldehyde resin with the complete and non-waste disposal of waste water and combustion products of wood wastes from woodworking enterprises, allowing to reduce the entry of radionuclides of cesium-137 in agricultural products, and to improve nitrogen phosphorus and potassium nutrition of plants.
5 tbl, 5 ex
| Title | Year | Author | Number |
|---|---|---|---|
| COMPLEX GLASS FERTILIZER WITH PROLONGED EFFECT AND METHOD FOR ITS PREPARING | 2001 |
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| METHOD FOR OBTAINING DEHYDRATION RESIN BASED ON POLYSACCHARIDES OF VEGETABLE RAW MATERIALS | 2022 |
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RU2817595C2 |
| METHOD OF NEUTRALIZATION OF TAR-WATER IN FORMALDEHYDE PRODUCTION | 0 |
|
SU1692949A1 |
| METHOD OF PRODUCING CARBAMIDE-FORMALDEHYDE RESIN | 2024 |
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RU2823244C1 |
| WASTE WATER TREATMENT PROCESS | 2002 |
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RU2228303C1 |
