Chemical apparatus and process disinfecting – deodorizing – preser – Process disinfecting – preserving – deodorizing – or sterilizing – Using disinfecting or sterilizing substance
Patent
1994-05-12
1996-09-17
McMahon, Timothy
Chemical apparatus and process disinfecting, deodorizing, preser
Process disinfecting, preserving, deodorizing, or sterilizing
Using disinfecting or sterilizing substance
422 37, A01N 2518
Patent
active
055565956
DESCRIPTION:
BRIEF SUMMARY
DESCRIPTION
1. Industrially Applicable Field
The present invention relates to a sheet material for eliminating methyl bromide which, after a fumigating operation with methyl bromide, is available for eliminating remaining methyl bromide, and to a process for eliminating remaining methyl bromide with it.
2. Prior Art
To use methyl bromide is indispensable in extermination of vermin in importing or exporting agricultural products and before storage thereof. As an instance involving use of a large amount of methyl bromide, there is a case of fumigating agricultural products, particularly fruits and vegetables with methyl bromide in exporting or importing them. In many case, methyl bromide remaining after the fumigation is subjected to burning or alkali-washing treatment requiring much cost.
In common farmers, however, such disposal of the remaining methyl bromide cannot usually be carried out owing to economic problems and thus it is emitted into the atmosphere, as it is.
In case of fumigating agricultural products with methyl bromide, the remaining methyl bromide immediately after completion of the fumigating treatment is treated by e.g., the above-mentioned manner, until the environment in a fumigating warehouse reaches at least a level of a work-permitting standard. Then, the agricultural products will be preserved within a certain period by storing them in a storehouse or by packing them into boxes. During such a preserving period, methyl bromide kept in the agricultural products by the fumigating treatment is gradually emitted off. In a certain instance, the concentration of methyl bromide in a container was over 500 ppm.
In such cases, when people work in the state that the container is open, a high level of methyl bromide may be emitted around the working area, thereby effecting a bad influence on human bodies. In the light of the recent position of preservation of the environment of the earth, restriction of emitting halogen compounds is important. In view of this matter, emitting methyl bromide into the atmosphere is not preferred. Furthermore, a high level of methyl bromide in the container contacts the agricultural products for a long time, so that both drop in their qualities and injury may occur. Thus, damages thereof are observed.
In particular when an environmental change happens, for example, the change such that temperature rises from a low temperature as in a refrigerator to ambient temperature at a working environment, much methyl bromide is emitted from agricultural products. Thus, they are seriously injured. All of these phenomena do not break out by injury with methyl bromide. It is however sure that methyl bromide is one of the main causes thereof.
For example, control of temperature and moisture degree, and investigation on the amount of ventilation are performed, in order to prevent such a bad effect based on methyl bromide as mentioned above. At present, however, direct remove of methyl bromide has seldom been carried out.
As an agent for eliminating methyl bromide, an absorbent is disclosed in JP-B-48-2116 and known in which hexamethylenetetramine is added and absorbed onto activated carbons. This is an agent for a gas mask and is used for eliminating methyl bromide to be absorbed in a body. At the present situation, it does not effect an adequate advantage for eliminating methyl bromide of a relatively high concentration in the atmosphere, e.g., after fumigation.
In the light of such a situation, a means is desired which makes it possible to remove remaining methyl bromide after fumigation directly and efficiently; and to control, at the minimum level, injury to agricultural products with the remaining methyl bromide, harm to humans and animals with it, and emission thereof into the atmosphere.
The inventors have investigated eagerly to overcome the above-mentioned problems. As a result, they have found that a sheet material for eliminating methyl bromide obtained by forming a paper mixed with activated carbons and adding or sticking an amine compound thereto can efficiently be se
REFERENCES:
patent: 4014670 (1977-03-01), Young
patent: 4812291 (1989-03-01), Friemel et al.
patent: 4966755 (1990-10-01), Smith
patent: 5213604 (1993-05-01), Saito et al.
DATABASE WPI Section Ch, Week 7820, Derwent Publications Ltd., London, GB; Class A10, AN 78-35427A & JP-A-53 035 712 (UNI CHARM K.K.) 3 Apr. 1978 Abstract.
Hayashimoto Shigeo
Maeda Shigeru
Ogawa Mikio
Suzuki Toshiyuki
Yoshida Norikazu
McMahon Timothy
Nippon Kayaku Kabushiki Kaisha
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