Method for preparing aldehyde ketone by efficiently catalyzing molecular oxygen to oxidize alcohol by taking hydrotalcite-like material as catalyst

Abstract

The invention belongs to the technical field of liquid-phase catalytic oxidation and provides a method for preparing aldehyde ketone by efficiently catalyzing molecular oxygen to oxidize alcohol by taking a hydrotalcite-like material as a catalyst. The catalyst can be expressed as A<n->-NixM-LDHs (A<n->=OH<->, CO3<2->, CH3COO<-> and PO4<3->; M is Ga or In; the ratio of Ni to M is (2-4) to 1). The method is characterized by preparing aldoketones compounds by carrying out aerobic oxidation reaction on alcohol under mild condition without adding additives in the presence of the catalyst. The hydrotalcite-like material can be synthesized in quantity and can be recycled; the method has the advantages of high selectivity and yield of aldehyde ketone, mild reaction condition, low cost and easiness in realizing industrialization.

Description

technical field [0001] The invention belongs to the field of liquid-phase catalytic oxidation, and specifically relates to a method for preparing aldehydes and ketones by using hydrotalcite-like catalysts as catalysts to efficiently catalyze molecular oxygen oxidation of alcohols. technical background [0002] Aldehydes and ketones are important chemical intermediates widely used in the synthesis and production of medicines, dyes and agrochemicals. The direct oxidation of alcohols is one of the important methods to prepare aldehydes. The traditional method of preparing aldehydes and ketones by oxidation of alcohols usually uses a large number of oxidants, such as manganese dioxide, chromium oxide, and periodate. The use of metered oxidants in industry tends to cause excessive oxidation of aldehyde products, and the selectivity of the reaction is often low. Moreover, these metal oxides are highly toxic, generate a large amount of solid waste, and cause heavy pollution, making...

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Problems solved by technology

Currently, potassium manganese octahedral molecular sieves (OMS-2) (Makwana, V.D.; et al. J. Catal. 2002, 210, 46–52), MnGa oxides (Amini, M.; et al. J. Mol. Catal .A:Chem.2014,394,303–308), and NiAl hydrotalcites (Choudhary,B.M.; et al.Angew.Chem.Int.Ed.Engl. 2001,40,763–766.Kawabata,T.; et al.J .Mol.Catal.A:Chem.2005,236,206–215) and other heterogeneous catalysts have been used for this reaction, but the conversion and selectivity of the reaction are low, and the reaction efficiency still needs to be improved

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