FUMIGANT FORMULATION

Abstract

The invention relates to a fumigant formulation comprising a mixture of ethyl formate dissolved in supercritical carbon dioxide.

Claims

1. Fumigant formulation comprising a mixture of a fumigant active ingredient and carbon dioxide, characterized in that the active ingredient is dissolved in supercritical carbon dioxide (CO2), which is acting as diluent for the fumigant active ingredient.

2. Fumigant formulation according to claim 1, characterized in that the fumigant active ingredient is selected from the group of: ethyl formate, 1,3-dichloropropene, dazomet (methyl isothiocyanate precursor), chloropicrin, iodoform, methyl isocyanate, sulfuryl fluoride.

3. Fumigant formulation according to claim 2 characterized in that the mixture consists of ethyl formate in a concentration of 3-15% by volume or 5-10% by volume, dissolved in CO2.

4. A fumigant formulation according to claim 1, wherein said formulation is a pesticide or a biocide.

5. Method to provide a mixture of a fumigant active ingredient and CO2, characterized in that the mixture of the fumigant active ingredient and CO2 is heated in a closed container to a temperature at which the CO2 becomes supercritical.

6. Method according to claim 5, characterized in that the fumigant active ingredient is selected from the group of: ethyl formate, 1,3-dichloropropene, dazomet (methyl isothiocyanate precursor), chloropicrin, iodoform, methyl isocyanate, sulfuryl fluoride.

7. Method according to claim 5, characterized in that the mixture of the fumigant active ingredient and CO2 is heated to a temperature preferably between 31 to 55 C. or higher or prefered between 35 to 50 C.

8. Method according to claim 5, characterized in that the mixture of the fumigant active ingredient and CO2 is heated until the fumigant active ingredient is completely dissolved in the supercritical CO2.

9. Method according to claim 5, characterized in that the mixture of the fumigant active ingredient and CO2 is heated in a container, especially in a gas cylinder, and that the pressure of a portion of the heated mixture of the fumigant active ingredient and CO2 is reduced and that the mixture is thereby transferred into its gaseous state.

10. Method according to claim 9, characterized in that the container is heated by electrical means, in particular by means of a heating jacket.

11. Method according to claim 9, characterized in that the mixture in the gaseous state is used for treatment of infested matter and/or for pest treatment.

12. Device for providing a mixture of a fumigant active ingredient and supercritical CO2 comprising a container to receive the mixture of the fumigant active ingredient and CO2, characterized in that the container is in heat transfer contact with heating means, especially with a heating jacket.

Description

[0032] FIG. 1 shows one example for a device for providing a mixture of fumigant active ingriedient and supercritical CO2. The fumigant active igriedient and CO2 are filled into the cylinder 1. The cylinder 1 is covered by a heating jacket 2. If fumigant should be taken out of the cylinder 1, the cylinder 1 is heated to 35 to 50 C. with the heating jacket. Therefore, the CO2 is transferred into a supercritical state and the fumigant active ingredient is dissolved homogenously in the supercritical CO2.