Preparation method of 2, 3, 6-trimethylphenol
A technology of trimethylphenol and xylenol, which is applied in the field of preparation of 2,3,6-trimethylphenol, can solve the problems of complex operation and high production cost, and achieve simple process, low cost and high selectivity Effect
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Embodiment 1
[0013] The catalyst was prepared by co-precipitation method, and the molar ratio of each component was Fe:Mg:Ce:V:K=100:30:5:5:0.5. Fill 40mL of this catalyst into a stainless steel fixed-bed reactor, mix the raw materials m-cresol, methanol, and water in a molar ratio of 1:5:3, feed them quantitatively through a metering pump, and mix them with carrier gas after preheating and gasification. Catalyst bed reaction. The reactant is led out from the bottom of the reaction tube. After condensation and gas-liquid separation, the gas phase product is released after being washed with water. The liquid phase product is rectified to remove methanol and water from the crude product. The crude product is rectified under reduced pressure to obtain pure 2, 3, 6 - tricresyl products. Liquid space velocity at 0.5h -1 , the catalyst was operated stably for 2000 hours in one pass under normal pressure, and the reaction product was analyzed by the internal standard method of gas chromatograph...
Embodiment 2
[0017] The catalyst was prepared by co-precipitation method, and the molar ratio of each component was Fe:Mg:Ce:V:Na=100:50:4:4:0.5. Fill 40mL of this catalyst into a stainless steel fixed-bed reactor, mix the raw materials m-cresol, methanol, and water in a molar ratio of 1:3:0.5, feed them quantitatively through a metering pump, and mix them with carrier gas after preheating and gasification. Catalyst bed reaction. The reactant is led out from the bottom of the reaction tube. After condensation and gas-liquid separation, the gas phase product is released after being washed with water. The liquid phase product is rectified to remove methanol and water from the crude product. The crude product is rectified under reduced pressure to obtain pure 2, 3, 6 - tricresyl products. Liquid space velocity 1.5h -1 , under the condition of a pressure of 1.0MPa, the catalyst operated stably for 2000 hours in one pass, and the reaction product was analyzed by the internal standard method o...
Embodiment 3
[0021] The catalyst was prepared by co-precipitation method, and the molar ratio of each component was Fe:Mg:Ce:V:K=100:10:2:3:0.5. Fill 40mL of this catalyst into a stainless steel fixed-bed reactor. After mixing the raw materials 2,5-xylenol, methanol, and water in a molar ratio of 1:3:3, the catalyst is quantitatively fed by a metering pump. After preheating and gasification, it is mixed with The carrier gas is mixed into the catalyst bed for reaction. The reactant is led out from the bottom of the reaction tube. After condensation and gas-liquid separation, the gas phase product is released after being washed with water. The liquid phase product is rectified to remove methanol and water from the crude product. The crude product is rectified under reduced pressure to obtain pure 2, 3, 6 - tricresyl products. Liquid space velocity 0.5h -1 , under the condition of a pressure of 1.0MPa, the catalyst operated stably for 2000 hours in one pass, and the reaction product was ana...
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