Phosphite containing catalysts for hydroformylation processes

Details Phosphite containing catalysts for hydroformylation processes Phosphite containing catalysts for hydroformylation processes

2011-04-19

2011-04-19

Witherspoon, Sikarl A (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C502S166000, C502S213000

Reexamination Certificate

active

07928267

ABSTRACT:
Novel trivalent organophosphite ligands having the structure of general formula (I):wherein R is an alkyl or aryl group containing 1 to 30 carbon atoms; Ar1and Ar2are aryl groups containing 4 to 30 carbon atoms; R1 to R6 are H or alkyl or aryl hydrocarbon radicals containing 1 to 40 carbon atoms; and X is a connecting group or a simple chemical bond, were developed and found to be very active for hydroformylation processes for ethylenically unsaturated substrates. Catalyst solutions prepared from these ligands with a Rh metal show an unusual “ligand acceleration effect” for simple alkenes, i.e., the hydroformylation activity increases as the concentration of ligand increases, and are capable of producing linear or branched aldehydes under typical hydroformylation conditions.

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