Method for producing 2-butenoic acid
A production method, crotonic acid technology, applied in the direction of chemical instruments and methods, carboxylate preparation, organic compound preparation, etc., can solve the problems of complicated post-treatment process, accelerated reaction speed, long catalytic reaction time, etc., and achieve reduction Effects of steam and electricity consumption, reduction of polymer generation, and shortening of oxidation reaction time
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Embodiment 1
[0026] A kind of production method of 2-butenoic acid, this production method comprises the following steps:
[0027] Step 1, 150kg of 2-butenal, 150kg of n-hexane, and 10kg of water are made into a mixed material liquid, and a jet pump, an inner heat exchanger and an outer heat exchanger are installed on the 1000L oxidation reaction kettle, and the jet pump is used to supply the oxidation reaction kettle Spray the mixed material liquid into the inside, and then pass in oxygen, and carry out the oxidation reaction under the conditions of keeping the reaction pressure in the oxidation reaction kettle at 0.1MPa and the temperature at 29°C to 32°C to obtain the oxidation reaction liquid;
[0028] Step 2, distilling the oxidation reaction liquid, recovering unreacted 2-butenal by distillation under reduced pressure, recovering unreacted n-hexane by distillation under normal pressure, and finally obtaining a filtrate;
[0029] Step 3. Cool the filtrate to -5°C to 5°C to precipitate...
Embodiment 2
[0033] A kind of production method of 2-butenoic acid, this production method comprises the following steps:
[0034] Step 1, 75kg of 2-butenal, 75kg of n-hexane, and 4.5kg of water are made into a mixed material liquid, and a jet pump, an inner heat exchanger and an outer heat exchanger are installed on a 500L oxidation reaction kettle, and the jet pump is used to feed the oxidation reaction Quickly spray the mixed material liquid into the kettle, and then pass in oxygen, and carry out the oxidation reaction under the conditions of keeping the reaction pressure in the oxidation reaction kettle at 0.12MPa and the temperature at 28°C to 30°C to obtain the oxidation reaction liquid;
[0035] Step 2, distilling the oxidation reaction liquid, recovering unreacted 2-butenal by distillation under reduced pressure, recovering unreacted n-hexane by distillation under normal pressure, and finally obtaining a filtrate;
[0036] Step 3. Cool the filtrate to -5°C to 5°C to precipitate cry...
Embodiment 3
[0040] A kind of production method of 2-butenoic acid, this production method comprises the following steps:
[0041] Step 1, 15kg of 2-butenal, 15kg of n-hexane, and 1.1kg of water are made into a mixed material liquid, and a jet pump, an inner heat exchanger and an outer heat exchanger are installed on a 100L oxidation reaction kettle, and the jet pump is used to feed the oxidation reaction Spray the mixed material liquid into the kettle, and then pass oxygen into it, and carry out the oxidation reaction under the conditions of keeping the reaction pressure in the oxidation reaction kettle at 0.15MPa and the temperature at 30°C to 33°C to obtain the oxidation reaction liquid;
[0042] Step 2, distilling the oxidation reaction liquid, recovering unreacted 2-butenal by distillation under reduced pressure, recovering unreacted n-hexane by distillation under normal pressure, and finally obtaining a filtrate;
[0043]Step 3. Cool the filtrate to -5°C to 5°C to precipitate crystal...
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