Synthesis device for pyraclostrobin intermediate p-chlorophenylhydrazine hydrochloride
A technology for chlorophenylhydrazine hydrochloride and pyraclostrobin, which is applied in the field of synthesis of p-chlorophenylhydrazine hydrochloride to achieve the effects of prolonging service life and being easy to clean
Active Publication Date: 2018-07-13
ANHUI GUANGXIN AGROCHEM
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[0003] The pyraclostrobin intermediate p-chlorophenylhydrazine hydrochloride is essential for the synthesis of the pyraclostrobin product. Currently, there are related synthesis studies, but there are few reports on the synthesis device.
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[0015] A synthesis device for pyraclostrobin intermediate p-chlorophenylhydrazine hydrochloride, the synthesis device includes a diazotization kettle 1, a sodium nitrite dissolution kettle 2, a hydrochloric acid high level tank 3, a hydrochloric acid storage tank 4, and a water metering tank 5. Suction filtration cylinder 6, reduction kettle 7, acid distribution kettle 8, acidification kettle 9 and condenser 10; use vacuum suction pipe to suck hydrochloric acid into hydrochloric acid high level tank 3 from hydrochloric acid storage tank 4, when the diazo After putting the raw material p-chloroaniline into the reaction kettle 1, add hydrochloric acid dropwise into the diazotization kettle 1 from the hydrochloric acid head tank 3 through the pipeline 11, stir to fully dissolve the solid p-chloroaniline, and then put it into the sodium nitrite dissolution kettle 2 Sodium nitrite, through the water metering tank 5 connected to the sodium nitrite dissolving kettle 2, add a certain a...
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The invention relates to a synthesis device of a pyraclostrobin intermediate p-chlorophenylhydrazine hydrochloride. The synthesis device comprises a diazotization kettle, a sodium nitrite dissolution kettle, a hydrochloric acid elevated tank, a hydrochloric acid storage tank, a water metering tank, a pump filtration cylinder, a reduction kettle, an acid blending kettle, an acidification kettle, and an acidification kettle condenser. Specifically, the top of the hydrochloric acid elevated tank is connected to the hydrochloric acid storage tank through a pipeline, the bottom of the hydrochloric acid elevated tank is connected to one side of the diazotization kettle top, and the other side of the diazotization kettle is connected to the sodium nitrite dissolution kettle, the water metering tank is also connected to the sodium nitrite dissolution kettle, a discharge port at the bottom of the diazotization kettle is connected to the top of the pump filtration cylinder, the bottom of the pump filtration cylinder is connected to one side of the acidification kettle top, the other side of the acidification kettle top is in connection with the acid blending kettle, and the bottom of the reduction kettle is connected to the condenser. Through relevant provisions of the equipment material, normal reaction is guaranteed, and at the same time the service life of the equipment is prolonged.
Description
technical field [0001] The invention relates to the field of synthesis of p-chlorophenylhydrazine hydrochloride, in particular to a synthesis device of pyraclostrobin intermediate p-chlorophenylhydrazine hydrochloride. Background technique [0002] Pyraclostrobin is a methoxyacrylate fungicide with a pyrazole structure. It was discovered by BASF in 1993, registered and launched in 2001, and has been used on more than 100 crops. In 2009, its sales reached 735 million US dollars, second only to azoxystrobin, becoming the second largest fungicide in the world. Pyraclostrobin has broad spectrum, high efficiency, low toxicity, is safe to non-target organisms, and is safe and friendly to users and the environment. It is an important product with good market prospects among strobilurin fungicides and whose patent is about to expire. [0003] The p-chlorophenylhydrazine hydrochloride, an intermediate of pyraclostrobin, is essential for the synthesis of pyraclostrobin. Currently, th...
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IPC IPC(8): C07C241/02C07C243/22
CPCC07C241/02C07C245/20C07C243/22
Inventor 黄金祥过学军吴建平胡明宏唐修德程伟家李红卫徐小兵黄显超戴玉婷
Owner ANHUI GUANGXIN AGROCHEM