Multi-stage process for continuous coating of fertilizer particles
US5211985A · kind A · utility
63Cited by
54References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 1991 |
| Grant date | May 18, 1993 |
| Priority date | — |
| Expiry date | Oct 9, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S118/05
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
An apparatus and method for continuously producing polymer coated particles, and in particular, a polymer coated fertilizer, wherein the coating material used is, for example, an aqueous film forming latex. The coating process is conducted with a plurality of fluidized beds, connected in series, under conditions such that, preferably, the relative humidity of the air in the initial coating zones is maintained below the critical relative humidity of the particle to be coated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.