A reaction device for fully sealed preparation of picoline

Abstract

The invention provides a reaction device for fully hermetically preparing azamethiphos, which includes a first reaction unit, a second reaction unit and a third reaction unit, wherein the first reaction unit includes a rotational-flow kettle, a oxazole [4,5-b] pyridine-2(3H) ketone storage tank, an N,N-dimethylformamide storage tank, a paraformaldehyde storage tank and a thionyl chloride storage tank, wherein the first reaction unit includes a first powder-liquid mixing pump; the first powder-liquid mixing pump includes a first inlet and a first outlet; the oxazole [4,5-b] pyridine-2(3H) ketone storage tank, the N,N-dimethylformamide storage tank and the paraformaldehyde storage tank are communicated with the first inlet; the first outlet is communicated with the rotational-flow kettle; the rotational-flow kettle includes a first main body; the first main body is hollow and forms a first reaction chamber; and the first reaction chamber adopts an inverted cone structure. The reaction device provided by the invention radically avoids harmful gas leakage and facilitates the environmental protection.

Description

technical field [0001] The invention relates to a device for preparing picoline, in particular to a fully sealed reaction device for preparing picoline. Background technique [0002] Pyridophos-methyl, also known as pyridophos-methyl, is an excellent insecticide, and its chemical name is S-[6-chloro-oxazole(4,5-b)pyridin-2(3hydrogen)-one group -Methyl]-O, O-dimethyl phosphorothioate, the molecular formula is C9H10ClN2O5PS, and the molecular weight is 324.68. Pyridophos is an excellent acaricide with insecticidal activity. It is a contact and stomach poison with good long-lasting effect and wide insecticidal spectrum. It can be used in cotton, fruit trees, vegetables and livestock, public health and family , prevent and control various mites and moths, aphids, leaf lice, small borers, potato beetles, flies, cockroaches, etc. This agent has low toxicity to humans and animals, and is a safe agent with high efficiency, low toxicity, and low residue. Therefore, picophos Become ...

AI Technical Summary

Problems solved by technology

[0005] However, when the first reaction unit 100 prepares the branched-chain chlorinated product, it is difficult to achieve complete sealing, and situations such as running, popping, dripping, and leaking are prone to occur during the preparation process.

The gas (such as hydrogen chloride) produced by the branched chlorinated product in the preparation process is highly toxic and corrosive, and leakage will easily affect the production environment and human health, which is not conducive to environmental protection.

There are two reasons: the first, because the oxazol[4,5-b]pyridin-2(3H) ketone is a solid raw material, it needs manual feeding every time, and the first reaction must be opened for manual feeding. kettle 10, affecting the sealing of the first reaction kettle 10

Second, since the first reactor 10 has a first stirring device 50, the sealing point between the first stirring device 50 and the first reactor 10 is easily affected by the raw materials for preparing the branched chlorinated products such as chlorination. The corrosion of sulfoxide and the gas produced in the reaction, such as hydrogen chloride, affects the sealing of the first reaction kettle 10 and becomes a hidden danger that cannot prevent the leakage of harmful gases

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