Hydroformylation reaction method for preparing isononaldehyde from diisobutylene and catalyst

Abstract

The invention discloses a hydroformylation homogeneous catalytic reaction method and a catalyst for preparing 3, 5, 5-trimethyl hexanal (alias isononyl aldehyde) from a mixture (alias: diisobutylene)of 2, 4, 4-trimethyl-1-pentene and 2, 4, 4-trimethyl-2-pentene. The method is characterized in that a rhodium compound is used as a catalyst metal precursor, an organic phosphine ligand is used as a catalyst ligand, a rhodium / organic phosphine ligand catalytic system is formed, the ratio of synthesis gas CO to H2 is 1: 1, the reaction temperature is 80-140 DEG C, the pressure is 1-8 MPa, the reaction time is 4-20 hours, and isonononaldehyde is prepared from diisobutylene. The method for preparing isononyl aldehyde from diisobutylene provided by the invention has the advantages of simple process, mild reaction conditions, high product normal-isomerism ratio and low cost, belongs to high-end products in the field of fine petrochemical engineering, and is suitable for industrial production.

Description

technical field [0001] The invention relates to a hydroformylation homogeneous catalytic reaction method and a catalyst for preparing isononanal from diisobutene separated from the carbon four fraction of a refinery. Background technique [0002] Refrigerant is commonly known as "refrigerant", and its impact indicators on the global environment mainly include ozone depletion potential (ODP) and global warming potential (GWP). At present, the refrigerant widely used in household air conditioners and heat pumps is R22, which belongs to the ozone-depleting substance HCFC (hydrochlorofluorocarbon), and is the most important transitional substitute for CFC (freon-hydrochlorofluorocarbon) substances. According to the Montreal Protocol, my country will phase out the production and consumption of HCFCs in all manufacturing industries by 2030. Alternative refrigerants for R22 can be roughly divided into three categories: the first category is HFC (hydrofluorocarbon) refrigerants, su...

AI Technical Summary

Problems solved by technology

The mono / bidentate phosphine ligands used in the key step from straight / branched olefins to straight / branched aldehyde hydroformylation have been adopted by large foreign chemical companies such as BASF, Dow, Johnson Matthey, Shell, Evonik and Eastman, etc. Patentization and technology blockade, but multidentate phosphine ligands are rarely reported (Org. Lett. 2013, 15, 1048-1052.)

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