Main production method: liquid catalyst hydroformylation + hydrogenation
The hydroformylation reaction is the reaction of olefins and synthesis gas (CO+H2) to produce aldehydes with one carbon higher than the raw material olefins, and the obtained aldehydes are hydrogenated and converted into alcohols. At present, Rh-based homogeneous catalysis process and cobalt-based homogeneous catalysis process are mainly used for the preparation of aldehydes in olefin hydroformylation reaction.
There are two main production processes for 1-Propanol in China, the first is ethylene hydroformylation to synthesize propionaldehyde, propionaldehyde is catalytically hydrogenated to produce 1-Propanol, and the second is the hydrogenation of allyl alcohol to produce 1,4-butanedi Alcohol by-product n-propanol method, there are only two domestic enterprises using this method, but the output is small, most domestic enterprises adopt the first method, the technology is relatively mature, water-soluble catalyst and oil-water two-phase reaction system, catalyst It exists in the water phase, and the product aldehyde is located in the oil phase. After the reaction, the catalyst and the product can be effectively separated by standing still. However, due to the low mass transfer efficiency of the two-phase reaction, which affects the catalytic effect, a phase transfer agent needs to be added, but the addition of the phase transfer agent It will lead to emulsification and increase the difficulty of phase separation. During the production process, as the activity of the catalyst decays, part of the catalyst must be discharged, and at the same time, an equal amount of catalyst must be replenished, which complicates the treatment process.