Method for producing aldehydes by hydroformylation in the presence of crown ether
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United States of America Patent
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May 14, 2002
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N/A
app pub date -
May 16, 2000
filing date -
Sep 25, 1997
priority date (Note) -
Expired
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Abstract
The invention relates to a method for producing aldehydes by reacting one olefine containing 3 to 12 carbon atoms with hydrogen and carbon monoxide in the presence of one rhodium catalyst. The invention is characterized in that (a) the rhodium catalyst is present in an aqueous phase, whereby the aqueous phase contains i) rhodium in an elemental or bonded form, ii) one trisulfonated triaryl phosphine, and iii) one crown etherl (b) the olefine is present in the reaction conditions in a liquid organic phase which cannot be mixed with the aqueous phase.
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