Palladium carbon catalyst for α-alkylation reaction of ketone and alcohol and preparation method thereof
A palladium-carbon catalyst and an alkylation reaction technology are applied in the preparation of hydroxyl compounds, chemical instruments and methods, preparation of organic compounds, etc., and can solve the problems of low selectivity, unsuitable catalysts, and low catalytic activity, and achieve catalytic activity. High, good research and industrial application prospects, the effect of simple process
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Embodiment 1
[0017] Step 1. Heat and stir the activated carbon with 1mol / L hydrochloric acid at 50°C for 4 hours, then wash it with deionized water until neutral, and dry it at 110°C to obtain activated carbon as a carrier;
[0018] Step 2, adjust the pH value of palladium chloride solution to 5 with sodium carbonate, then mix with the gac obtained in step 1;
[0019] Step 3: Heat and stir the slurry in Step 2 at 80° C. for 2 hours, keep it warm and reduce it with a formaldehyde reducing agent to obtain a palladium-carbon catalyst.
Embodiment 2
[0021] Get 10g of the palladium-carbon catalyst prepared in Example 1 to prepare a slurry, slowly add 1mL of 5mmol / L sodium borohydride alkaline solution (0.5% NaOH), continue to stir for 12h, filter, wash until neutral, and vacuum at 80°C After drying, the hydrophobic palladium carbon catalyst is obtained.
Embodiment 3
[0023] Take 10 g of the palladium-carbon catalyst prepared in Example 1 and prepare it into a slurry, slowly add 3 mL of 5 mmol / L sodium borohydride alkaline solution (0.5% NaOH), continue to stir for 12 h, filter, wash until neutral, and dissolve the mixture at a temperature of 80 ° C. Vacuum-dried to obtain a hydrophobic palladium-carbon catalyst.
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