Preparation method of hydrogen peroxide composite catalyst by direct reaction of hydrogen and oxygen
A composite catalyst, hydrogen peroxide technology, applied in metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, peroxide/peroxyhydrate/peroxyacid/superoxide/ozonide In other directions, it can solve the problems of high production cost of hydrogen peroxide, large investment in anthraquinone method and concentrated production, and high cost of 2-ethylhydroanthraquinone, so as to achieve a green reaction path, avoid the generation of by-product water, and ensure hydrogen efficiency. Effect
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Embodiment 1
[0042] Active hydrogen donor using K 2 PtCl 4 Synthesis of Encapsulated Platinum Sodalite as a Precursor to Platinum Particles.
[0043] Raw material ratio: (m (K 2 PtCl 4 ):m(Si-Al gel)=0.500g / g), n(Si / Al)=1:1.
[0044] The active hydrogen acceptor is carbon nitride prepared by using dicyandiamide as a precursor at a heating rate of 1 °C / min to 450 °C, and roasting in a muffle furnace for 40 min.
[0045] The active hydrogen donor and the active hydrogen acceptor were composited by grinding method. Take 1g of the active hydrogen donor and 10g of the active hydrogen acceptor, add 1.1mL of ethanol to wet grind for 30min, and then dry to prepare the composite catalyst. A validation reaction was performed, ie, a validation experiment was performed using batch reaction conditions as per catalyst validation.
Embodiment 2
[0047] The active hydrogen donor uses Pt(NH 3 ) 2 (NO 3 ) 2 Synthesis of encapsulated platinum type A molecular sieves as precursors to platinum particles.
[0048] Raw material ratio: (m (Pt(NH 3 ) 2 (NO 3 ) 2 ):m(Si-Al gel)=0.01g / g), n(Si / Al)=1:1.5.
[0049] The active hydrogen acceptor uses melamine as the precursor to support the specific surface area of 800m 2 According to the mass ratio of melamine and activated carbon of 10:1 on the coal-based activated carbon, a total of 11g, the impregnation method was used, deionized water was used as a solvent, 110mL of deionized water was added, stirred for 240min, and placed in a vacuum drying phase to dry at 85°C. It is prepared by roasting at 750°C for 180min in a tube furnace with a heating rate of 1°C / min.
[0050] The active hydrogen donor and the active hydrogen acceptor are composited by a grinding method, and 2 g of the active hydrogen donor and 0.2 g of the active hydrogen acceptor are dry-milled for 5 minutes ...
Embodiment 3
[0052] The active hydrogen donor uses Pt(NH 3 ) 4 Cl 2 Synthesis and encapsulation of platinum sodalite as a precursor of platinum particles,
[0053] Raw material ratio: (m (Pt(NH 3 ) 4 Cl 2 ):m(Si-Al gel)=0.041g / g), n(Si / Al)=1:1.2.
[0054] And with the cation as NH 4 + Prepare H-type platinum sodalite by salt exchange.
[0055] Graphene was used as the active hydrogen acceptor.
[0056] The active hydrogen donor and the active hydrogen acceptor were composited by grinding method, and 1 g of the active hydrogen donor and 2 g of the active hydrogen acceptor were added dropwise with 4 mL of acetol and wet-milled for 5 minutes to prepare the composite catalyst. A validation reaction was performed, ie, a validation experiment was performed using batch reaction conditions as per catalyst validation.
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Abstract
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