Process for producing a granular slow-acting nitrogenous fertilizer
US5039328A · kind A · utility
14Cited by
3References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 7, 1990 |
| Grant date | Aug 13, 1991 |
| Priority date | — |
| Expiry date | Feb 7, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC05C9/02
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process for producing a granular slow-acting nitrogenous fertilizer, which comprises blending an aqueous methylol urea solution to a urea-isobutyraldehyde condensate powder or a mixture thereof with a urea-formaldehyde condensate powder, and granulating the resulting blend while subjecting the methylol urea to dehydration condensation under an acidic condition to form a urea-formaldehyde condensate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.