Insect ether and producing method thereof
A production method and technology of pyriproxyfen, applied in botany equipment and methods, animal repellents, biocides, etc., can solve problems such as extinction, growth damage, and destruction of the natural ecological environment, and achieve long-lasting, ecological Small environmental impact and the effect of reducing the possibility of poisoning
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Embodiment 1
[0026] Embodiment 1, 4-hydroxydiphenyl ether: propylene oxide: 2-chloropyridine=1: 1: 1 (1: 1: 1 raw material molar ratio),
[0027] First throw in 145Kg of ethanol, then throw in 16Kg of sodium hydroxide, stir and make them completely dissolve, then throw in 73Kg of 4-hydroxydiphenyl ether, make it completely dissolve, then add 22.8Kg of propylene oxide dropwise, the dropwise addition is completed, at 20 React at ~35°C, add water after 16 hours, and filter to obtain 85-90Kg of the first step product 1-(4-diphenyl ether)-2-methyl isopropanol.
[0028] In the second step, first put 280Kg of toluene and the product of the first step of the previous step reaction and raise the temperature to 55-60°C to completely dissolve it, then add 87Kg of potassium hydroxide, keep it between 60-70°C to completely dissolve the potassium hydroxide, and then Slowly add 44.5Kg of 2-chloropyridine dropwise, then raise the temperature to 100-110°C, keep warm for 16 hours, evaporate the solvent to o...
Embodiment 2
[0029] Embodiment 2,4-hydroxydiphenyl ether: propylene oxide: 2-chloropyridine=1: 1.5: 1.2 (1: 1.5: 1.2 raw material molar ratio),
[0030] First put in ethanol and sodium hydroxide with the same amount, then put in 73Kg of 4-hydroxydiphenyl ether and 34.2Kg of propylene oxide after complete dissolution, and keep other conditions constant to obtain 88-90Kg of the first step product.
[0031] In the second step, 280Kg of toluene is put in to react with the first step product obtained in the previous step, 53.4Kg of 2-chloropyridine is added dropwise, and other conditions remain unchanged, 53Kg of pyriproxyfen crude product is obtained, 50Kg is obtained after recrystallization, and 48Kg mosquito fly is obtained after drying Ether products.
Embodiment 3
[0032] Embodiment 3,4-hydroxydiphenyl ether: propylene oxide: 2-chloropyridine=1: 1.98: 1.31 (1: 1.98: 1.31 raw material molar ratio),
[0033] Other conditions are all the same, the first step 4-hydroxydiphenyl ether 73Kg, propylene oxide 46Kg, get the first step product 85-90Kg; The second step first drops into toluene 300Kg and last step first step product reaction, other conditions are not Change, add potassium hydroxide to be 90Kg, 2-chloropyridine 58.3Kg, obtain pyriproxyfen crude product 55Kg after completion of the reaction, obtain 53Kg after recrystallization, obtain 50Kg pyriproxyfen finished product after drying.
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