Controlled release composition and method of manufacturing same

Details Controlled release composition and method of manufacturing same Controlled release composition and method of manufacturing same

1985-08-26

1990-12-04

Lander, Ferris H.

Chemistry: fertilizers

Processes and products

Organic material-containing

71 65, 71 79, 71DIG1, 71 6413, 71904, 34 10, 47 58, 514 1, 514769, 514772, C05G 300, C05G 302, C05G 304, C05F 500

Patent

active

049751085

ABSTRACT:
Controlled release compositions are manufactured by subjecting cellulosic pulp rejects to a dewatering operation to remove approximately 25% of the water; flash-drying the obtained partially dewatered rejects, causing the rejects to expand and become porous; adding an additive material to impregnate the expanded and porous cellulosic material, and drying. The cellulosic material holds or retains the additive for delayed release. The compositions have good stability and structural integrity.

REFERENCES:
patent: 3017720 (1962-01-01), Busch
CA 75(21): 128815k, Rauscher et al., "Pesticides on Porous Fiber Carriers", 1971.
CA 83(26): 207785o, Hedstrom, "Apparatus and Method for Drying Cellulose Pulp", 1975.

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