Overview[1][2]
Aluminum phosphide is a highly toxic, broad-spectrum inorganic fumigation insecticide and rodenticide. The pure product is white crystal, does not melt, and sublimates when heated to 1100°C. The industrial product is a gray-green or brown solid, odorless, stable under dry conditions, and easily absorbs water to release phosphine. The phosphine gas released by aluminum phosphide in the air enters the insect body through the insect respiratory system and acts on the respiratory chain and cytochrome oxidase of the cell mitochondria, killing the insect. Insects exposed to high concentrations of phosphine will suffer from paralysis or protective coma, and their respiratory rate will decrease. Due to the reduced amount of inhaled phosphine, the efficacy of the drug will decrease. Therefore, the principle of low-concentration and long-term fumigation should be adopted in applications. It is easy to decompose under ultraviolet light irradiation. Higher concentrations, such as above 1 mg/L, have an inhibitory effect on microorganisms and seed respiration.
Production line[2]
The aluminum phosphide single grain packaging automatic production line involves four technical links: low temperature environment 1, single grain packaging 2, can packaging 3 and finished product 4. The so-called low-temperature environment 1 and single-grain packaging 2 are produced and packaged in a low-temperature environment below 20°C, mainly to avoid high-temperature and high-humidity operating environments and achieve low-humidity operating environments. Borrowing the technology of candy single-piece packaging, using double-layer plastic wrapping paper or tin foil plastic wrapping paper to implement automatic single-piece packaging of aluminum phosphide 2, using the existing technology of candy single-piece packaging machine, using wrapping paper to pack aluminum phosphide tablets The implementation of single-pellet packaging 2 can realize the continuous operation of tableting and packaging processes, avoiding the pollution of the environment caused by open operations, especially the harm to operating workers. In order to be suitable for long-term storage, single-grain aluminum phosphide tablets packaged2 can be packaged in cans3 in quantities of 500 tablets, 1000 tablets or convenient retail quantities, and can be packaged in aluminum cans, tinplate cans or plastic barrels. , carry out secondary sealing and packaging, which becomes the finished aluminum phosphide product 4. Using the above-mentioned aluminum phosphide single-grain packaging automatic production line, the low-temperature environment 1 and single-grain packaging 2 are continuously completed. The packaging cost is reduced compared with the existing packaging forms, and the packaging speed is fast, eliminating the poison to the operators. , safe and convenient storage and transportation. Especially suitable for farmers who use small doses.
Equipment method[3 Organobentonite rheological additive]
How to prepare aluminum phosphide, the steps are:
In the first step, aluminum phosphide is prepared by mixing an organic solvent with the wet product of aluminum phosphide, distilling and dehydrating it.
The second step is to use the solvent as a carrier to dehydrate through spray heating or heating and distillation through a membrane evaporator, which can make the dehydration process and wet crushing, modulation, and packaging processes operate continuously.
The third step is to complete the complexation of maneb and zinc in an organic solvent and the dehydration and crystallization processes at the same time
The third step reduces the decomposition of the product, reduces the pollution of harmful impurities and dust, and avoids fire accidents during the drying process of the product. The solvent method in this step has fast dehydration speed, high production safety and efficiency, and simplifies the production process.
Main reference materials
[1] Encyclopedia of Chinese Agriculture·Pesticides Volume
[2] [Invented in China] CN03111744.9 Aluminum phosphide single grain packaging automatic production line
[3] CN2 What is an antioxidant 01310396915.4 A method of preparing aluminum phosphide
