Method for preparing isopropylbenzene, isopropylbenzene and preparation method of epoxypropane
A technology of cumene and oxidation state, which is applied in the field of hydrogenolysis of tower reactor materials to generate cumene, can solve the problems of poor catalyst performance, low initial selectivity of cumene, and high initial activity, so as to prevent performance deterioration. , maintain stable activity and selective effect
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Embodiment 1
[0087] Mix 1 liter of alumina carrier with 2000 g of chloropalladium acid aqueous solution containing 3.0 g of palladium, dry at 110° C. for 8 hours, and roast at 450° C. for 4 hours to obtain the oxidized palladium-based catalyst precursor. Its main composition is shown in Table 1. The above-mentioned oxidized palladium-based catalyst precursor was reduced in stages with hydrogen, and the specific reduction methods and steps are shown in Table 2.
[0088] Carry out the hydrogenation operation that contains α, the hydrocarbon material of α-dimethylbenzyl alcohol (as shown in Table 1) in continuous mode, described material and hydrogen carry out contact reaction at catalyst bed layer, and the operating condition of reactor is as follows:
[0089] Reaction temperature: 150°C
[0090] Reaction pressure: 1.5MPa
[0091] Fresh oil volume space velocity: 1.5h -1
[0092] Liquid circulation ratio: 4
[0093] Hydrogen / fresh oil volume ratio: 500
[0094] The average results of t...
Embodiment 2
[0096] Mix 1 liter of alumina carrier with 2000 g of chloropalladium acid aqueous solution containing 3.0 g of palladium, dry at 110° C. for 8 hours, and roast at 450° C. for 4 hours to obtain the oxidized palladium-based catalyst precursor. The specific composition of the catalyst is shown in Table 1.
[0097] Put the above-mentioned oxidized palladium-based catalyst precursor in a liquid environment of α,α-dimethylbenzyl alcohol and cumene, wherein the ratio of the two is 1:1, and reduce it in stages with hydrogen. The specific reduction methods and steps are shown in Table 2 .
[0098] Carry out the hydrogenation operation that contains α, the hydrocarbon material of α-dimethylbenzyl alcohol (as shown in Table 1) in continuous mode, described material and hydrogen carry out contact reaction at catalyst bed layer, and the operating condition of reactor is as follows:
[0099] Reaction temperature: 150°C
[0100] Reaction pressure: 1.5MPa
[0101] Fresh oil volume space ve...
Embodiment 3
[0106] Mix 1 liter of alumina carrier with 2000 g of chloropalladium acid aqueous solution containing 3.0 g of palladium, dry at 110° C. for 8 hours, and roast at 450° C. for 4 hours to obtain the oxidized palladium-based catalyst precursor. Its main composition is shown in Table 1.
[0107] The above-mentioned oxidized palladium-based catalyst precursor was reduced in stages with hydrogen in a cumene liquid environment. The specific reduction methods and steps are shown in Table 2.
[0108] Carry out the hydrogenation operation that contains α, the hydrocarbon material of α-dimethylbenzyl alcohol (as shown in Table 1) in continuous mode, described material and hydrogen carry out contact reaction at catalyst bed layer, and the operating condition of reactor is as follows:
[0109] Reaction temperature: 150°C
[0110] Reaction pressure: 1.5MPa
[0111] Fresh oil volume space velocity: 1.5h -1
[0112] Liquid circulation ratio: 4
[0113] Hydrogen / fresh oil volume ratio: 50...
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