Patent ID: 6331657
Filing Date: 2001-12-18
Classification: C07C

Abstract:
A process for preparing higher oxo alcohols from mixtures of isomeric olefins having from 5 to 24 carbon atoms by two-stage hydroformylation in the presence of a cobalt catalyst or rhodium catalyst at elevated temperature and at elevated pressure, comprising:(a) selectively hydrogenating a reaction mixture obtained by hydroformylating isomeric olefins having from 5 to 24 carbon atoms;(b) distilling the hydrogenation mixture from (a) into crude alcohol and low-boilers,wherein the low-boilers comprise unreacted olefins from the hydroformylation of the isomeric olefins;(c) hydroformylating the low-boilers from (b);(d) selectively hydrogenating the hydroformylation reaction mixture from (c);(e) distilling the hydrogenation mixture from (d) into crude alcohol and low-boilers;(f) distilling the crude alcohol to obtain a purified alcohol; and(g) discharging at least a portion of low-boilers which comprise saturated hydrocarbons.