Method for olefin hydroformylation using iridium-based catalyst

A method for olefin hydroformylation using an iridium-based catalyst, comprising the following steps:

• under a condition that the iridium-based catalyst is existed, olefins, carbon monoxide, and hydrogen are used as raw materials to perform a catalytic reaction;
• before the catalytic reaction, the iridium-based catalyst is dissolved in a solvent;
• the solvent is one of n-butyraldehyde, iso-butyraldehyde, toluene or tetraxofuran;
• characterized in that a chemical structural formula of the iridium-based catalyst is:
• wherein Ph is a phenyl, R is a methyl or an ethyl, and X is one or more of CH3CO2, NO3, BF4, PF6 and SbF6;
• wherein a preparation method of the iridium-based catalyst comprises the following steps:
• mixing and stirring 4,5-bis(diphenylphosphoryl)-9,9-dimethylxanthene, solvent and iridium compound, and then heating and stirring to obtain the iridium-based catalyst;
• wherein a time for mixing and stirring 4,5-bis(diphenylphosphoryl)-9,9-dimethylxanthene, solvent and iridium compound is 2 h;
• wherein during the heating and stirring process, a temperature is raised to 50° C., and then stirring for 2 h;
• when X in the iridium-based catalyst is CH3CO2, NO3, BF4, PF6 or SbF6, the temperature is first raised and stirred to obtain a substance to be substituted, and then a compound containing an X-based group is added to replace the substance to be substituted.