초록 ▼

This invention relates to a method of fumigating agricultural products in storage or transportation facilities for controlling pests by means of hydrogen phosphide which is then bound and/or decomposed to a substantial extent; according to the invention, a fumigating composition releasing hydrogen p

This invention relates to a method of fumigating agricultural products in storage or transportation facilities for controlling pests by means of hydrogen phosphide which is then bound and/or decomposed to a substantial extent; according to the invention, a fumigating composition releasing hydrogen phosphide is placed in a manner known per se among products stored in conventional storage facilities, whereupon the stored products are covered with a flexible film, foil or sheet to isolate them from the surrounding storage space, and the hydrogen phosphide diffusing from the gas containing space above and among the stored products during or after fumigation is bound by adsorption, physical or chemical absorption and/or decomposed by chemical or physical means. The invention also relates to a specific solid catalyst suitable for the decomposition of hydrogen phosphide.

대표청구항 ▼

A method for preventing the release into the atmosphere of hydrogen phosphide during or after the fumigation therewith of an agricultural product stored in a bulk storage or transportation facility which is only partially filled therewith and from which hydrogen phosphide can escape during or after

A method for preventing the release into the atmosphere of hydrogen phosphide during or after the fumigation therewith of an agricultural product stored in a bulk storage or transportation facility which is only partially filled therewith and from which hydrogen phosphide can escape during or after the fumigation, which comprises the steps of: (a) covering the exposed outer surface of the stored product with a flexible sheet material which is at least substantially gas impervious, in a manner which isolates the stored product from the surrounding unfilled storage space in the facility and at least hinders gas exchange between the filled portion of the storage space of the facility beneath the flexible material and the filled space above the flexible material; (b) introducing a fumigating amount of hydrogen phosphide into the thus-covered stored product; (c) actively withdrawing and collecting air from the unfilled storage space above the covered product in an amount effective to prevent hydrogen phosphide from escaping into the atmosphere from the facility; and (d) removing any hydrogen phosphide in the withdrawn air therefrom before discharging that air into the atmosphere.