Preparation method of diisobutyl adipate
A technology of diisobutyl adipate and adipic acid, which is applied in the field of organic compound preparation, can solve problems such as difficult cost reduction, unfavorable economic benefits, and many production equipments, and achieves production cost reduction, investment saving, and convenient operation Effect
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Embodiment 1
[0028] A preparation method of diisobutyl adipate, the steps are as follows:
[0029] ⑴Esterification reaction steps
[0030] Add 100 kg of adipic acid, 300 kg of isobutanol, and 0.3 kg of concentrated sulfuric acid into a 500-liter reactor with a heating device, electric stirring, thermometer water circulation condenser and oil-water separator, and heat to Boiling reaction, keep the boiling reflux state, continuously separate the water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.
[0031] ⑵Washing steps
[0032] Add 50 kg of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand and separate the layers, and remove the water layer therein.
[0033] ⑶ dealcoholization step
[0034] The mixture washed with water was dealcoholized to obtain the crude product, diisobutyl adipate.
[0035] ⑷ Refining steps
[0036] Add 0.5 kg of refined preparation (a mixture...
Embodiment 2
[0040] A preparation method of diisobutyl adipate, the steps are as follows:
[0041] ⑴Esterification reaction steps
[0042] Put 100 kg of adipic acid, 300 kg of isobutyl alcohol, and 0.3 kg of concentrated sulfuric acid into a 500-liter reactor with a heating device, electric stirring, thermometer, water circulation condenser, and oil-water separator, and heat simultaneously under stirring. Until the boiling reaction, keep the boiling reflux state, continuously separate the water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.
[0043] ⑵Washing steps
[0044] Add 50 kg of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand and separate the layers, and remove the water layer therein.
[0045] ⑶ dealcoholization step
[0046] The mixture washed with water was dealcoholized to obtain the crude product, diisobutyl adipate.
[0047] ⑷ Refining steps
[0048...
Embodiment 3
[0052] A preparation method of diisobutyl adipate, the steps are as follows:
[0053] ⑴Esterification reaction steps
[0054] Add 100 kilograms of adipic acid, 300 kilograms of isobutyl alcohol, and 0.3 kilograms of concentrated sulfuric acid to a 500-liter reaction kettle with a heating device, electric stirring, thermometer water circulation condenser and oil-water separator. Heating to boiling reaction, maintaining the boiling reflux state, continuously separating water from the oil-water separator, until no water is generated, stop heating, and the esterification reaction is terminated.
[0055] ⑵Washing steps
[0056] Add 50 kg of water to the mixed solution obtained after the esterification reaction, stir evenly, leave to stand and separate the layers, and remove the water layer therein.
[0057] ⑶ dealcoholization step
[0058] The mixture washed with water was dealcoholized to obtain the crude product, diisobutyl adipate.
[0059] ⑷ Refining steps
[0060] Add 0.7...
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