Method for preparing gluconic acid/gluconate and hydrogen by glucose catalytic dehydrogenation under gentle conditions
A technology of gluconate and gluconic acid, which is applied in the direction of oxidative preparation of carboxylic acid, chemical instruments and methods, and preparation of carboxylate, which can solve the problems of oxygen waste and single product, and achieve the goal of avoiding polluted products, high atom utilization rate, Avoid the effect of separating energy consumption
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Embodiment 1
[0030] Embodiment 1: chloroplatinic acid and urea are dissolved in the aqueous solution, the concentration of chloroplatinic acid is 0.4g / L, the concentration of urea is 0.08mol / L, the pH value of adjustment solution is greater than the isoelectric point of the carrier, and the carrier modified activated carbon Add to the above solution, control the reaction temperature to 95°C, and the reaction time is 24h, filter and wash until the catalyst is free of Cl - , drying at 100°C for 12 hours, calcination at 400°C in argon atmosphere for 2 hours, argon flow rate at 30mL / min, roasting at 300°C in a mixed atmosphere of hydrogen and argon for 2 hours, at argon flow rate at 20mL / min, and hydrogen flow rate at 10mL / min, to form Pt / AC. The Pt loading was 4%.
Embodiment 2
[0031] Embodiment 2: Dissolving chloroplatinic acid and urea in an aqueous solution, the concentration of chloroplatinic acid is 0.4g / L, the concentration of urea is 0.08mol / L, the pH value of the adjustment solution is greater than the isoelectric point of the carrier, and the carrier graphene oxide Add to the above solution, control the reaction temperature to 95°C, and the reaction time is 24h, filter and wash until the catalyst is free of Cl - , drying at 100°C for 12 hours, calcination at 400°C for 2 hours in an argon atmosphere, argon flow rate at 30mL / min, roasting at 300°C in a mixed atmosphere of hydrogen and argon for 2 hours, at argon flow rate at 20mL / min, and hydrogen flow rate at 10mL / min, to form Pt / Gr, The Pt loading was 4%.
Embodiment 3
[0032] Embodiment 3: chloroplatinic acid and urea are dissolved in the aqueous solution, the concentration of chloroplatinic acid is 0.4g / L, the concentration of urea is 0.08mol / L, the pH value of adjustment solution is greater than the isoelectric point of the carrier, and the carrier modified carbon Nanotubes were added to the above solution, the reaction temperature was controlled at 95°C, the reaction time was 24h, and the catalyst was filtered and washed until the catalyst was free of Cl - , drying at 100°C for 12h, calcination at 400°C for 2h in argon atmosphere, argon flow rate at 30mL / min, calcination at 300°C in a mixed atmosphere of hydrogen and argon for 2h, at argon flow rate of 20mL / min, and hydrogen flow rate at 10mL / min, to form Pt / CNTs. The Pt loading was 4%.
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