| 摘要 |
A process for preparing hydroformylation products of olefins having from 2 to 8 carbon atoms comprises a) feeding a hydrocarbon feedstock into a cracking/dehydrogenation zone and subjecting it to thermal and/or catalytic cracking and/or dehydrogenation to give an olefin-containing cracker gas, b) subjecting the cracker gas or fractions thereof to a fractionation to give at least one C<SUB>i</SUB>-olefin-enriched hydrocarbon stream and at least one C<SUB>i</SUB>-olefin-depleted hydrocarbon stream, c) feeding the C<SUB>i</SUB>-olefin-enriched hydrocarbon stream together with carbon monoxide and hydrogen into a hydroformylation zone and reacting it in the presence of a hydroformylation catalyst, d) separating a stream consisting essentially of unreacted C<SUB>i</SUB>-olefin and saturated C<SUB>i</SUB>-hydrocarbon from the output from the hydroformylation zone, e) recirculating at least part of the stream consisting essentially of unreacted C<SUB>i</SUB>-olefin and saturated C<SUB>i</SUB>-hydrocarbon to step b), where i is an integer from to 8. The proposed coupling of the hydroformylation with, for example, a steam cracker allows complete hydroformylation of the olefins produced without olefin losses via the waste gas. |
