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US 6,835,324 B1Granted
Method for isolating oleic acid and producing lineloic dimer/trimer acids via selective reactivity
AssigneeArizona Chemical Company
InventorElso DiFranco
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Abstract
A method whereby polyunsaturated components of fatty acids are conjugated and selectively polymerized in the presence of monounsaturated components, mainly oleic acid. Separation techniques are employed to isolate oleic acid and the linoleic acid-based dimer/trimer acids produced.
Claims19
A method for treating fatty acids comprising:
- adding an iodine catalyst selected from the group consisting of iodine (I2) and iron iodine (FeI2) to a fatty acid, which contains polyunsaturated components, to form a mixture;
- heating said mixture to cause conjugation of said polyunsaturated components;
- further reacting said mixture under heat with the addition of a polymerization catalyst to cause polymerization of the conjugated polyunsaturated components to produce a composition containing about 100% by weight of a mixture of linoleic dimer/trimer acids and oleic acid;
- and recovering, based on the weight of the starting material, at least 50% or more oleic acid from said composition.
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Dependencies are inferred from the claim text.