FIELD: production of aldehydes. SUBSTANCE: the products C3-C5 aldehydes. Reagent 1: olefin. Reagent 2: carbon monoxide and hydrogen. Reaction conditions: the process of hydroformylation of olefins with synthesis gas comprises absorption at 0 to 60 C and a pressure of 3.45 to 9.4 atm followed by distilling the unreacted olefin from the absorbent by blowing off with a synthesis gas at a pressure of 7 to 35 atm and a temperature of 0 to 130 C and separating a mixture of synthesis gas. The latter mixture is recycled into a hydroformylation reactor. EFFECT: more efficient preparation process. 5 cl, 1 dwg
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