Ruthenium-based catalyst and method for preparing 2,5-furandicarboxylic acid by using same
A technology of ruthenium-based catalyst and furandicarboxylic acid, which is applied in the field of biomass resource utilization, can solve the problems of inappropriate production process and low yield, and achieve the effects of simplified preparation process, high yield and high activity
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Embodiment 1
[0025] Catalyst preparation:
[0026] 0.0388g RuCl 3 ·3H 2 O was added to 50 mL of water and stirred until dissolved to obtain Ru 3+ 0.5 g of HAP with a diameter of 1-100 nm was added to it, stirred and impregnated for 10 min; the solid was separated by filtration, washed three times with deionized water, and dried at 55°C for 12 h to obtain catalyst B1.
[0027] The loading of ruthenium in catalyst B1 was detected by inductively coupled plasma (ICP) to be 2.2% by mass.
[0028] Preparation of 2,5-furandicarboxylic acid (2,5-FDCA) by oxidation of 5-methoxymethylfurfural (MMF) catalyzed by catalyst B1:
[0029] Add catalyst B1, MMF and water into the reactor, and the mass ratio of MMF to catalyst is 1:1. After tightening, add oxygen to 0.5MPa and seal, heat to 100°C and react for 12 hours, take out the reaction kettle and put it in cold water to cool down, after the cooling is completed, open the reaction kettle, wash with methanol aqueous solution, and transfer it to a vol...
Embodiment 2
[0032] Catalyst preparation:
[0033] In addition to changing the RuCl 3 ·3H 2 The mass of O was 0.0647g, and the immersion time was 30min. The preparation of other catalysts was the same as that in Example 1 to obtain catalyst B2 with a ruthenium loading of 4.5%.
[0034] Except that the mass ratio of MMF to catalyst was changed to 1:0.5, the MMF oxidation reaction conditions were the same as in Example 1, the conversion of MMF was 86.7%, the selectivity of 2,5-FDCA was 60.3%, and the yield was 52.3%.
Embodiment 3
[0036] Catalyst preparation:
[0037] In addition to 0.0388g RuCl 3 ·3H 2 O was changed to 0.0050g ruthenium nitrate, and the stirring and impregnating time was changed from 10min to 1h, the preparation of other catalysts was the same as in Example 1 to obtain catalyst B3, and the loading of ruthenium was 0.1%.
[0038] Except that the mass ratio of MMF to catalyst was changed to 1:5, the MMF oxidation reaction conditions were the same as in Example 1, the conversion of MMF was 80.13%, the selectivity of 2,5-FDCA was 50.3%, and the yield was 40.3%.
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