Catalyst in use for hydrogenation reaction of benzene selection, preparartion method and application
A technology for selective hydrogenation and catalysts, applied in the fields of hydrogenation to hydrocarbons, chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of high cost and high content of precious metal ruthenium, and achieve high activity and selective effect
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[0034] Example 1
[0035] The preparation of solution A: 8.0g surfactant nonylphenol polyoxyethylene ether-7 (NP-7), 0.86g containing 14.55wt% ruthenium trichloride, 50mL cyclohexane, in a 500mL four-mouth round bottom Mix in the flask, 30°C and stirring, to obtain translucent solution A.
[0036] Preparation of solution B: adding 8.0 g of surfactant NP-7 and 2.14 g of a 6.54 wt% potassium borohydride aqueous solution into 30 mL of cyclohexane, controlling the temperature at 30° C., and stirring to obtain a translucent solution B.
[0037] Catalyst preparation: control the temperature to 30°C, and under the protection of nitrogen, add solution B to solution A dropwise while stirring. After dripping, add 2.68g of ethyl orthosilicate, 10mL of 12.5% by weight ammonia, overnight, add 50mL of acetone after the reaction, centrifuge, and wash with absolute ethanol and water, the obtained catalyst number is 1.
[0038] Catalyst activation: Take the above catalyst, add 100 mL of 0.6M zin...
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[0042] Example 2
[0043]Add 30 mL of cyclohexane to 8.0 g of surfactant NP-7 and 2.15 g of hydrazine hydrate solution with a concentration of 14.80 wt%, control the temperature at 30° C., and stir to obtain translucent solution B. The other preparation steps are the same as in Example 1. The obtained catalyst number is 2. The results of the reaction are shown in Table 1.
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[0044] Example 3
[0045] 8.0 g of surfactant NP-7 and 2.43 g of a 5.62 wt% formaldehyde aqueous solution were added to 30 mL of cyclohexane, the temperature was controlled at 30° C., and the mixture was stirred to obtain a translucent solution B. The rest of the preparation steps are the same as in Example 1, and the obtained catalyst number is 3. The results of the reaction are shown in Table 1.
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