Organic compounds -- part of the class 532-570 series – Organic compounds – Phosphorus containing
Reexamination Certificate
2011-01-18
2011-01-18
Witherspoon, Sikarl A (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Phosphorus containing
C568S454000, C502S166000, C502S213000
Reexamination Certificate
active
07872156
ABSTRACT:
Novel fluorophosphite compounds having the structure of general formula (I):where 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 compounds 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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Liu Yun-Shan
Rodgers Jody Lee
Eastman Chemical Company
Graves, Jr. Bernard J.
McGreevey William K.
Witherspoon Sikarl A
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