Research Progress on Sustainable and Green Production of Oxime

The ammoximation reaction of ketones and aldehydes is a crucial industrial process for producing oximes, which has the advantages of a short process, mild reaction conditions, high ultilization of nitrogen atoms, and environmental friendliness. Significant efforts have been made to advance this process using Ti-containing zeolites as catalysts. This review discusses the reaction mechanisms of liquid-phase ammoximation, highlighting the challenges in designing effective catalysts. Research conducted over the past decades on designing high-performance, low-cost, and easily separable catalysts has been systematically reviewed. The structure–performance relationship of the zeolite catalyst is particularly examined, aiming to offer new insights for the design and preparation of more efficient catalysts in the future. Additionally, recent advances in process optimization for ammoximation are discussed, including the influence of reaction conditions on performance, the development of new reactors, industrial examples, and life cycle assessments. Finally, based on the discussion, future perspectives for enhancing the sustainability of ammoximation industrialization are outlined.