Patent ID: 11970429
Assignee: CARBO CERAMICS, INC.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  A  B | IPC A  B  C

Claim 13:
14. A method of making a coated composite particle, comprising:
atomizing a slurry comprising a clay comprising kaolin into droplets;
coating a seed particle comprising an agricultural treatment material with the droplets to form a green pellet, the agricultural treatment material comprising urea;
drying the green pellet to form a composite particle; and
coating the composite particle with a biodegradable polymer to form the coated composite particle, wherein the composite particle has an average cross-sectional length and the seed particle comprises about 30% to about 80% of the average cross-sectional length of the composite particle, and wherein the composite particle has a volume and the shell comprises about 10% to about 40% of the volume of the composite particle.