PROCESS FOR PREPARATION OF ALDEHYDES Russian patent published in 1994 - IPC

FIELD: organic synthesis. SUBSTANCE: C₄ or C₅ aldehydes are prepared by hydroformulation of C₃-C₄ olefins with carbon monoxide-hydrogen mixture the presence rhodium-polyphosphite complex as a catalytic agent at temperatures of 70-120 C and pressure less than 35.15 kg/cm² in molar carbon monoxide hydrogen ratio of 1: 1-2, with rhodium content being of 191-1000 ppm, and molar polyphosphite ligand- rhodium ratio being of 3.2-26.1: 1. Polyphosphite ligand is addend of the general formula given in description of the invention. EFFECT: high yield of the end product.