Synthetic method for 2-methylallyl alcohol
A technology for the synthesis of methallyl alcohol and its synthesis method, which is applied in the field of synthesis of 2-methallyl alcohol and can solve the problem of low selectivity of 2-methallyl alcohol
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Embodiment 1
[0034] (1), preparation of catalyst
[0035] 850 grams of spherical γ-alumina with a diameter of 3 mm and 500 grams of nickel nitrate aqueous solution (calculated as NiO, containing 150 grams of NiO) were mixed, left to stand for 1 hour, dried at 80 ° C for 4 hours, and roasted at 500 ° C for 4 hours to obtain 1000g NiO / α-Al 2 o 3 Catalyst, the content of NiO in the catalyst is 15wt%.
[0036] (2), the synthesis of 2-methallyl alcohol
[0037] The fixed bed is loaded with the catalyst obtained by the above steps, the inert diluent is nitrogen, and the mol ratio of the inert diluent to 2-methyl-1,3-propanediol in the gas phase raw material is 3, and the gas phase raw material is 2-methyl-1,3 -Propylene glycol meter mass space velocity is 10 hours -1 , the reaction temperature is 320° C., the reaction pressure is 25 kPa, the reaction result is: the conversion rate of 2-methyl-1,3-propanediol is 95%, and the selectivity to 2-methallyl alcohol is 78.9%.
Embodiment 2
[0039] (1), preparation of catalyst
[0040] Mix 850 grams of spherical γ-alumina with a diameter of 3 mm and 500 grams of cobalt nitrate aqueous solution (calculated as CoO, including 150 grams of CoO), let it stand for 1 hour, dry at 80 ° C for 4 hours, and bake at 500 ° C in a nitrogen atmosphere 4 hours, get 1000 g CoO / α-Al 2 O3, CoO content in the catalyst is 15wt%.
[0041] (2), the synthesis of 2-methallyl alcohol
[0042] The fixed bed is filled with the catalyst obtained by the above steps, the inert diluent is nitrogen, and the mol ratio of the inert diluent to 2-methyl-1,3-propanediol in the gas phase raw material is 10, and the gas phase raw material is 2-methyl-1,3 -Propylene glycol meter mass space velocity is 10 hours -1 , the reaction temperature is 320° C., the reaction pressure is 25 kPa, the reaction result is: the conversion rate of 2-methyl-1,3-propanediol is 95%, and the selectivity to 2-methallyl alcohol is 80.0%.
Embodiment 3
[0044] (1), preparation of catalyst
[0045] Mix 950 g of spherical γ-alumina with a diameter of 3 mm with 500 g of NH 4 VO 3 Aqueous solution (in V 2 o 5 gauge, including V 2 o 5 A total of 50 grams) were mixed, left to stand for 1 hour, dried at 80°C for 4 hours, and roasted at 500°C for 4 hours to obtain 1000 grams of V 2 o 5 / α-Al 2 o 3 Catalyst, Catalyst V 2 o 5 The content is 5wt%.
[0046] (2), the synthesis of 2-methallyl alcohol
[0047] The fixed bed is filled with the catalyst obtained by the above steps, the inert diluent is nitrogen, and the mol ratio of the inert diluent to 2-methyl-1,3-propanediol in the gas phase raw material is 20, and the gas phase raw material is 2-methyl-1,3 -Propylene glycol meter mass space velocity is 10 hours -1 , the reaction temperature is 300° C., and the reaction pressure is 25 kPa. The reaction result is: the conversion rate of 2-methyl-1,3-propanediol is 95%, and the selectivity to 2-methylallyl alcohol is 80.0%.
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