Catalyst used for synthesis of aldehyde or ketone through oxidation of alcohol, and preparation method and application thereof

Abstract

The invention discloses a catalyst used for synthesis of aldehyde or ketone through oxidation of alcohol and a preparation method and application thereof, belonging to the technical field of fine chemical engineering. The active center of the catalyst is a micron-order silver copper alloy particle, and a carrier for the catalyst is a nanowire array of a silicon particle. The preparation method comprises the following steps: immersing the silicon particle in a mixed solution of silver nitrate and cupric nitrate in proportion; adding a hydrogen fluoride solution and carrying out an oxidation reduction reaction at a temperature of 30 to 60 DEG C; then heating to a temperature of 80 to 95 DEG C so as to remove residual hydrogen fluoride; cooling to a temperature of 10 to 20 DEG C, and adding a hydrazine hydrate solution for a reduction reaction; then heating to a temperature of 80 to 95 DEG C so as to remove residual hydrazine hydrate and carrying out cooling; and drying and roasting a solid product obtained after solid-liquid separation so as to obtain the catalyst. The catalyst provided in the embodiments in the invention has the advantages of high catalytic activity, uneasy sintering agglomeration, good stability, superior catalytic performance at a temperature in a range of 200 to 600 DEG C and a wide application scope.

Description

technical field [0001] The invention belongs to the technical field of fine chemicals, in particular to a catalyst for the oxidation of alcohols to synthesize aldehydes or ketones and its preparation method and application, in particular to a silver-copper catalyst for the oxidation of fatty alcohols and aromatic alcohols to synthesize corresponding aldehydes or ketones The invention relates to a preparation method and application thereof, in particular to a catalyst that can be used to synthesize corresponding aldehydes or ketones such as methanol, ethylene glycol, ethyl lactate and phenethyl alcohol, and a preparation method thereof. Background technique [0002] The selective oxidation of fatty alcohols or aromatic alcohols to corresponding aldehydes or ketones is an important basic reaction in fine chemicals, and the obtained aldehydes or ketones are important organic intermediates for the preparation of spices, drugs and food additives. For example, formaldehyde, the pr...

AI Technical Summary

Problems solved by technology

Studies have shown that silver-copper composite catalysts have better low-temperature reactivity in the oxidation of alcohols, but commonly used metal nitrates such as copper nitrate are not oxidative, so silver-copper-embedded silicon nanowire arrays cannot be prepared using the methods mentioned above. supported catalyst

However, conventional two-component catalyst preparation methods such as mixed solution impregnation method, deposition precipitation method, and double impregnation method cannot produce uniform micron-sized silver-copper alloy particles, and the catalytic effect and stability are not ideal.