Method for manufacturing carvacrol by carvone composite foot oil
A technology of carvone and carvacrol, applied in chemical instruments and methods, preparation of organic compounds, organic chemistry, etc., can solve problems such as waste, impurities, increased energy consumption, etc.
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Embodiment 1
[0025] In the state of stirring, put 187.5kg of water and 125kg of sodium bisulfite into the reaction kettle, mix it into a sodium bisulfite solution with a concentration of 40%, stir, heat up to 70°C, and drop 500kg of carvone containing 30% Synthetic foot oil, control the temperature at 70°C to 80°C during the dropping process, keep the temperature at 70°C to 80°C after the dripping is completed, take samples for analysis every 1 hour, and end when the content of carvone in the organic phase is lower than 0.5% reaction. Add 300kg of water to dilute, dissolve, let stand, remove the organic phase, and extract the water phase with toluene twice to obtain about 730kg of sodium α-hydroxysulfonate solution.
[0026] Add 160 kg of 30% sodium hydroxide solution into the above-mentioned α-hydroxysulfonate sodium solution, stir, heat up and reflux for 2 hours, cool down, neutralize to neutral with 40% sulfuric acid solution, let stand, and divide to remove water phase, about 145kg of...
Embodiment 2
[0030] Under the state of stirring, put 156kg of water and 104kg of sodium bisulfite into the reaction kettle, mix it into a sodium bisulfite solution with a mass concentration of 40%, stir, heat up to 70°C, and add 500kg of carvone containing 30% dropwise. Synthetic foot oil, control the temperature at 70°C to 80°C during the dropping process, keep the temperature at 70°C to 80°C after the dripping is completed, take samples for analysis every 1 hour, and end when the content of carvone in the organic phase is lower than 0.5% reaction. Add 300kg of water to dilute, dissolve, let stand, separate the organic phase, and extract the water phase with toluene twice to obtain about 725kg of α-hydroxysulfonate sodium solution.
[0031] Add 135 kg of 30% sodium hydroxide solution to the above-mentioned α-hydroxysulfonate sodium solution, stir, heat up and reflux for 2 hours, cool down, neutralize to neutral with 40% sulfuric acid solution, stand still, and divide to remove water phas...
Embodiment 3
[0035] In the stirring state, put 171.6kg of water and 114.4kg of sodium bisulfite into the reaction kettle, mix it into a sodium bisulfite solution with a concentration of 40%, stir, raise the temperature to 70°C, and add dropwise 500kg of 30% carvone Synthetic foot oil, the temperature is controlled at 70°C to 80°C during the dropping process, and the temperature is kept at 70°C to 80°C after the dripping, and the sample is analyzed every 1 hour. When the content of carvone in the organic phase is lower than 0.5% End the reaction. Add 300kg of water to dilute, dissolve, let stand, separate the organic phase, and extract the water phase with toluene twice to obtain about 727kg of α-hydroxysulfonate sodium solution.
[0036] Add 147kg of 30% sodium hydroxide solution to the above-mentioned α-hydroxysulfonate solution, stir, heat up and reflux for 2 hours, cool down, neutralize to neutral with 40% sulfuric acid solution, let stand, and divide to remove water phase, about 143kg...
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