1,7-Octadiene process
AssigneeShell Oil Company
InventorKenzie Nozaki
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Abstract
A process for preparing 1,7-octadiene by hydrodimerizing butadiene which comprises reacting the butadiene in the presence of formic acid or a salt thereof, optionally a solvent and a catalyst comprising palladium complexed with a tertiary phosphinite or phosphonite. More active catalysts are obtained with phosphinites and phosphonites than with phosphines or phosphites.
Claims9
A process for preparing 1,7-octadiene which comprises hydrodimerizing butadiene in the presence of formic acid or a salt of formic acid, optionally a solvent, a catalytic amount of palladium and a tertiary organophosphorus ligand having the formula:
- (RO).sub.a PR.sub.b
- wherein R is aryl, alkyl, aralkyl or alkaryl with less than about 20 carbon atoms where the Rs attached to the phosphorus and oxygen atoms are the same or different, O is oxygen, a+b equals 3 and b is 1 or 2.
The process for preparing 1,7-octadiene which comprises hydrodimerizing butadiene in the presence of formic acid or a salt of formic acid, optionally a solvent, a catalytic amount of palladium and a tertiary organo phosphorus substituted resin ligand having the formula:
- Z-P(RO).sub.h Rd.sub.i
- wherein Z is a crosslinked synthetic resin, R is aryl, alkyl, aralkyl or alkaryl with less than about 20 carbon atoms where the Rs attached to the phosphorus and the oxygen are the same or different, O is oxygen, h is an integer from 1 to 2 and i is 2-h.
Dependencies are inferred from the claim text.