Process for the preparation of water-dispersible granules

Details Process for the preparation of water-dispersible granules Process for the preparation of water-dispersible granules

B - Operations, Transporting

01

J

167/3, 23/374

B01J 2/00 (2006.01) A01N 25/12 (2006.01) A01N 25/14 (2006.01) B01J 2/16 (2006.01)

Patent

CA 2012660

Granules can be prepared from powders of active compounds by the counter-current principle by fluidization in a stream of air and spraying of a solution of adhesive. Dispersions or solutions of active compounds can be granulated in accordance with the invention if the aqueous dispersion or solution is sprayed by the counter-current principle into the gas stream of a fluidizing chamber and is caused to fluidize, the formation of granules being started, in a start-up phase, at 10 to 60 % of the maximum gas flow and at only up to 30 % of the maximum feed rate of dispersion or solution, and subsequently the feed rate and the gas flow are increased up to the maximum values for the feed rate and the gas flow, and, an the main phase, the formation of granules is continued at maximum gas flow and maximum feed rate. Granules prepared in this way, containing pesticides as the active compounds, can be used as plant protection agents or pest control agents.

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