Process for making granules containing urea as the main component
US4500336A · kind A · utility
12Cited by
1References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1982 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Jun 18, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C273/02
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for making granules containing urea as the main component by prilling or granulating a urea melt or an aqueous urea solution, which melt or solution may contain one or more other fertilizers, such as ammonium sulphate, ammonium dihydrogen phosphate and diammonium hydrogen phosphate, in solution and/or suspension. According to the invention, a water-soluble aluminum salt is added to the melt, solution or suspension to be prilled or granulated. Preferably the aluminum salt is added in a quantity equivalent to at least 0.1% by weight of Al.sub.2 O.sub.3, calculated on the solid content of the melt, solution or suspension.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.