Method for improving selectivity of cis pinane prepared by alpha-pinene hydrogenation

Abstract

Silicon sol supported amorphous Ni is used as a precursor for reducing crystal nano Ni, and special magnetic Fe3O4 powder is used as a carrier of nano metal Ni. In the process of forming crystal nano Ni, the magnetic carrier plays a role in regulating and controlling the feature of crystal nano Ni, and self-assembly of the nano Ni crystal is realized, so that needle-like Ni nano wires with similar one-dimensional structure are formed. When the catalyst is applied in the preparation of cis pinane by alpha-pinene selective hydrogenation, the hydrogenation activity is inspected, and the result shows that the selectivity of the cis pinane is obviously improved through the catalyst compared with commercial Raney Ni.

Description

technical field

[0001] The invention relates to a new method for preparing a composite nano-nickel catalyst supported by a magnetic carrier. Amorphous Ni supported on silica sol was used as the precursor of reduced crystalline nano-Ni, and a magnetic Fe 3 o 4 As a carrier, a crystalline nano-nickel catalyst with a needle-like special shape was prepared by combining the chemical reduction method with the electroless plating method. This type of catalyst exhibits better catalytic performance than framework nickel in the selective hydrogenation of α-pinene to cis-pinane. Background technique

[0002] The main components of turpentine are α-pinene and β-pinene. The cis-pinane produced by catalytic hydrogenation has a wide range of uses in the terpenoid fragrance industry, especially in the preparation of linalool and dihydromyrcene. Pinane is an indispensable and important intermediate. Since the hydrogenation of α-pinene and β-pinene is mainly carried out on the side of the...

Images