A metal-solid acid double-site catalyst and its application in catalyzing xylose dehydration-hydrogenation to prepare furfuryl alcohol
A technology of catalyst and solid acid, which is applied in metal-solid acid double-center catalyst and its application in catalyzing xylose dehydration-hydrogenation to prepare furfuryl alcohol, which can solve the problems of high raw material cost, limited large-scale development, and low catalytic activity and other issues, to achieve the effect of improving safety and economy, realizing recycling, and simple reaction process
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Embodiment 1
[0034] 1. Preparation of sulfonated graphene solid acid catalyst
[0035] 1) Synthesis of diazonium salt of sulfanilic acid: Add 3 ml NaOH (0.02 g / ml) and 1 g of sulfanilic acid into a 100 ml beaker, and fully dissolve the sulfanilic acid under the condition of heating in a water bath . At room temperature, add 0.2 g NaNO to the above solution 2 , to be NaNO 2 After complete dissolution, add 4 ml of ice water and 1 ml of concentrated HCl to the beaker with constant stirring. At this time, the temperature of the beaker was controlled at 0° C. and maintained for 20 minutes.
[0036] 2) Preparation of sulfonated graphene solid acid: 40 ml (6.5 mg / ml) GO solution was ultrasonically dispersed for 30 minutes, then the diazonium salt solution of p-aminobenzenesulfonic acid was added dropwise into the beaker containing GO, and The mixed solution was continuously stirred for 8 hours under ice bath condition. The product was centrifuged and washed several times to obtain GO-SO 3 H...
Embodiment 2
[0042] 1. Preparation of sulfonated graphene solid acid catalyst
[0043] 1) Synthesis of diazonium salt of p-aminobenzenesulfonic acid: add 1 ml NaOH (0.02g / ml) and 0.5 g p-aminobenzenesulfonic acid to a 100 ml beaker, and fully dissolve p-aminobenzenesulfonic acid under the condition of heating in a water bath dissolve. At room temperature, add 0.05g NaNO to the above solution 2 , to be NaNO 2 After complete dissolution, add 2.5 ml of ice water and 0.5 ml of concentrated HCl to the beaker with constant stirring. At this time, the temperature of the beaker was controlled at 0° C. and maintained for 20 minutes.
[0044] 2) Preparation of sulfonated graphene solid acid: 45 ml (6.5 mg / ml) GO solution was ultrasonically dispersed for 30 minutes, then the diazonium salt solution of p-aminobenzenesulfonic acid was added dropwise to the beaker containing GO, and The mixed solution was continuously stirred for 6 hours under ice bath condition. The product was centrifuged and was...
Embodiment 3
[0050] 1. Preparation of sulfonated graphene solid acid catalyst
[0051] 1) Synthesis of diazonium salt of sulfanilic acid: Add 4 ml NaOH (0.02 g / ml) and 2 g of sulfanilic acid into a 100 ml beaker, and fully dissolve the sulfanilic acid under the condition of heating in a water bath . At room temperature, add 0.2 g NaNO to the above solution 2 , to be NaNO 2 After complete dissolution, add 5 ml of ice water and 2 ml of concentrated HCl to the beaker with constant stirring. At this time, the temperature of the beaker was controlled at 0° C. and maintained for 20 minutes.
[0052] 2) Preparation of sulfonated graphene solid acid: 61.6 ml (6.5 mg / ml) GO solution was ultrasonically dispersed for 30 minutes, then the diazonium salt solution of p-aminobenzenesulfonic acid was added dropwise into the beaker containing GO, and The mixed solution was continuously stirred for 8 hours under ice bath condition. The product was centrifuged and washed several times to obtain GO-SO 3...
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