Preparation method of composite slow-release nano-nitrogen fertilizer
US12304877B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 2024 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Dec 3, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P60/21
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A preparation method of a composite slow-release nano-nitrogen fertilizer: stirring cellulose, nanoclay, and water to allow a reaction to obtain a mixture, subjecting the mixture to solid-liquid separation, and then subjecting an obtained solid to drying, crushing, and sieving in sequence to obtain a solid sample a1; subjecting the solid sample a1 to pyrolysis, and then cooling an obtained product to a room temperature to obtain a solid sample a2; sieving humic acid and the nanoclay and adding into water and stirring to allow a reaction to obtain a mixture, subjecting the mixture to solid-liquid separation, and then subjecting an obtained solid to drying, crushing, and sieving in sequence to obtain a solid sample b2; subjecting the solid sample a2, the solid sample b2, and urea to melt-blending, and then subjecting an obtained mixture to washing, drying, and crushing in sequence to obtain the composite slow-release nano-nitrogen fertilizer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.