Patent ID: 11926573
Assignee: SULVARIS INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  B | IPC B  C

Claim 9:
10. A sulphur-urea fertilizer composition obtained by:
a) preparing and maintaining molten urea at a suitable temperature for injection into a granulator;
b) preparing and maintaining a suspension of micronized sulphur particles with at least 20% water wt. content, with a relatively uniform micronized particle size distribution, for injection into the granulator the suspension further comprising a surfactant;
c) prior to injection into the granulator, combining the urea and micronized sulphur suspension, wherein the water wt. content of the suspension cools the mixture of urea and micronized sulphur suspension, and the micronized sulphur particles substantially remain in solid state;
d) spraying the mixture of urea and micronized sulphur suspension into a granulator using a nozzle where about 20% wt. of the water content in the mixture of urea and micronized sulphur suspension is flashed off, wherein the granulator forms micronized sulphur-urea granules with a relatively uniform distribution of urea and micronized sulphur particles; and
e) forming the granules of sulphur-urea fertilizer composition without a further drying step in a dedicated drying equipment, wherein the granulator forms sulphur-urea granules with a relatively uniform distribution of urea and micronized sulphur particles.