Method of preparing pesticide formulation by freeze drying

Details Method of preparing pesticide formulation by freeze drying Method of preparing pesticide formulation by freeze drying

A - Human Necessities

01

N

167/2

A01N 25/00 (2006.01) A01N 25/14 (2006.01)

Patent

CA 1057192

A B S T R A C T Process for the preparation of a pesticide formulation containing at least 80% by weight of pesticidally toxic material, which comprises freezing an intimate mixture containing the pesticidal toxicant, at least one surface- active agent and a sublimable liquid medium, reducing the pressure above the frozen mixture to below the triple point pressure of the liquid, and removing the medium as a gas whilst maintaining the pressure below that at which the medium can exist in a liquid form.

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