Submitted to: American Chemical Society Abstracts
Publication Type: Abstract Only
Publication Acceptance Date: January 1, 2005
Publication Date: March 13, 2005
Citation: Doll, K.M., Erhan, S.Z. 2005. The improved synthesis of carbonated soybean oil in supercritical carbon dioxide. American Chemical Society Abstracts. p.74. Technical Abstract: Carbonates from oleochemical origin have shown recent promise in the cosmetics, filter, and detergent industries. Carbonates may also form building blocks for polymeric materials. Especially of interest are cyclic carbonates, which upon addition with an amine, form a non-isocyanate urethane. Many traditional preparations of carbonates are expensive and involve environmentally unfriendly phosgene, or metal catalysis. However, it is possible to use a simple base catalyst to directly add carbon dioxide to an epoxide. We have synthesized and characterized carbonated soybean oil from commercially available epoxidized soybean oil using a tetrabutylammonium bromide catalyst. Our synthesis takes advantage of the higher density of super critical carbon, as compared to the gas, to considerably reduce the time required for the reaction. Fully epoxidized product could be produced in 40 hours at 100 deg C (1500 PSI of CO2), as opposed to the 70 hours required in the literature.