Method for preparing aldehyde by hydroformylation of olefins

Abstract

The invention discloses a method for preparing aldehyde by hydroformylation of olefins. According to the method, a catalyst is put into a reactor, and C3-C20 olefin, which is used as a raw material, is introduced along with a reaction gas mixture into the reactor to carry out hydroformylation of olefins. The main components of the gas mixture include H2 and CO. The volume content of H2+CO is 20-90%; liquid hourly space velocity is 0.01-10.0 h<-1>; gas space velocity is 100-20000h<-1>; the space velocity is preferably in the range of 1000-20000 h<-1>; the remaining gas of the gas mixture is oneor more gases of Ar, CO2, He or N2; the reactor is a fixed bed, a slurry bed, a trickle bed or a bubbling bed reactor; the reaction temperature is 323-573 K and the reaction temperature is preferably353-393 K; and the reaction pressure is preferably 0.5-2 MPa, and the reaction pressure is 0.1 to 10.0 MPa. In the technical scheme of the invention, the olefin hydroformylation reaction has the characteristics of good stability, high activity and high selectivity.

Description

technical field [0001] The invention belongs to the field of heterogeneous catalysis, and in particular relates to a method for preparing aldehydes through hydroformylation of olefins. Background technique [0002] In industry, the olefin hydroformylation reaction is considered to be the most successful example of homogeneous catalysis, in which the raw material olefin and synthesis gas (CO / H 2 ) with 100% selectivity to aldehydes with one more carbon atom than the starting alkene. Aldehydes are very useful chemical intermediates, and their subsequent conversion products alcohols, acids, esters and fatty amines are very important fine chemical products, and are widely used as organic solvents, plasticizers and surfactants. [0003] At present, the aldehyde produced by hydroformylation in the world is about 10 million tons per year, and about 50% of the aldehyde is butyraldehyde produced by propylene hydroformylation. Table 1 describes the propylene hydroformylation product...

AI Technical Summary

Problems solved by technology

The catalyst realizes the heterogeneity of the hydroformylation homogeneous catalyst, but compared with the homogeneous catalyst, the activity and selectivity of the ligand-modified supported catalyst are greatly reduced, and the Rh metal is formed as a nanoparticle Dispersed form, low metal utilization

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