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ARS Home » Midwest Area » Peoria, Illinois » National Center for Agricultural Utilization Research » Functional Foods Research » Research » Publications at this Location » Publication #276145

Title: Characterization of the solvent properties of oleochemical carbonates

item HUYNH, T - University Of Arkansas
item SRINIVAS, K - University Of Arkansas
item Kenar, James - Jim
item KING, J - University Of Arkansas

Submitted to: Meeting Abstract
Publication Type: Abstract Only
Publication Acceptance Date: 4/29/2012
Publication Date: 5/2/2012
Citation: Huynh, T., Srinivas, K., Kenar, J.A., King, J.W. 2012. Characterization of the solvent properties of oleochemical carbonates. AOCS Annual Meeting and Expo.

Interpretive Summary:

Technical Abstract: Oleophilic carbonates, such as hexadecyl carbonate, can be characterized with respect to their solvent properties using inverse gas chromatography (IGC). Physicochemical properties of these renewable lipid derivatives are of importance for applications such as their use as phase change materials, fuel additives, and as reagents in chemical synthesis. Initial IGC measurements have been conducted using hexadecyl carbonate over the temperature range of 70-100 C. The logarithm of the solute specific retention volumes follow a linear trend with respect to the reciprocal of absolute temperature based on the solute's relative volatility or molecular weight. Solute mole fraction activity coefficients in the carbonate stationary phase are positive for four of the classes of solutes consisting of aliphatic hydrocarbons, select ketones, and homologous series of the lower aliphatic alcohols and acids; while negative deviations from Raoult's Law occur for the selected aromatic and chlorinated solutes. Similarly, weight fraction activity coefficients, Henry's Law constants, partition coefficients, and chi solute-solvent interaction parameters have been established for the six solute classes. Chi interaction parameters support the use of aliphatic-, aromatic- and chlorinated solutes to dissolve in the lipophilic carbonates.