3 results about "Catalytic transfer hydrogenation" patented technology

The application of flower-shaped alumina microspheres in the catalytic transfer hydrogenation of furfural to furfuryl alcohol belongs to the fields of nanomaterials and catalysis. The flower-shaped alumina microspheres utilize ionic surfactants as structure-directing agents and sodium aluminate as the aluminum source; amides are added as precipitants, and the resulting precursor is then calcined. The microsphere preparation process is mild and simple. In the catalytic transfer hydrogenation reaction, the flower-shaped alumina microspheres achieve highly selective conversion of furfural to furfuryl alcohol without the need for precious metals as reactive centers. Furthermore, the reaction does not use molecular hydrogen as a hydrogen source, resulting in low equipment requirements and promising application prospects.

The application discloses a green catalytic hydrogenation preparation method of low-trans fatty acid edible hydrogenated oil, and comprises the following steps: dispersing an amorphous Ni-Fe-P alloy catalyst in pretreated vegetable oil to obtain a catalyst-oil mixture; introducing the catalyst-oil mixture and a hydrogen donor solution into a microchannel reactor with multiple temperature zones to perform gradient hydrogenation reaction; wherein the microchannel reactor is integrated with an electrochemical hydrogen generation unit, and a direct current electric field is applied to at least one temperature zone; after the reaction is completed, the catalyst is separated and recovered, and the hydrogenated oil is post-treated to obtain the low-trans fatty acid edible hydrogenated oil; for the first time, the electrochemical hydrogenation and catalytic transfer hydrogenation two green hydrogenation technologies are integrated in the microchannel reactor, and the reaction path is regulated by combining the electric field, so that the formation of carbonium ion intermediates and double bond isomerization is fundamentally inhibited, the content of trans fatty acids in the final hydrogenated oil is reduced, and the health value of the product is significantly improved.

This disclosure provides an application of a nickel-based polyimide catalyst in catalytic transfer hydrogenation. The application includes: adding a biomass derivative substrate, an alcohol hydrogen donor, and a water mixture as solvents to a reaction vessel; and, under an inert atmosphere without external hydrogen, converting the biomass derivative substrate into corresponding cyclopentanone and / or cyclopentanol products through a catalytic transfer hydrogenation reaction. The nickel-based polyimide catalyst comprises a polyimide microsphere support and a nickel metal active component supported on the polyimide microsphere support. This disclosure constructs a composite catalytic system with polyimide microspheres as the support and nickel metal as the active component, utilizing the unique proton enrichment function of the polyimide support to achieve efficient and highly selective hydrogenation conversion of furan aldehyde substrates using an alcohol hydrogen donor as the hydrogen source under a non-hydrogen inert atmosphere.