Process for making renewable source-based citrate esters and acylated citrate esters
AssigneeArcher Daniels Midland Company
InventorStephen Howard
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Abstract
Improved processes are described for making trialkyl esters and acylated trialkyl esters of carboxylic acids, as well as epoxidized trialkyl esters and acylated trialkyl carboxylate esters, such as are used in developing plasticized PVC compositions. In particular, processes are described for conducting the esterification and acylation steps involved in making the acylated trialkyl esters in a single vessel without an intermediate purification step, by means of a Lewis acid metal triflate catalyst.
Claims24
A process for making a trialkyl carboxylate ester, comprising reacting a carboxylic acid, carboxylic acid anhydride or carboxylic acid chloride with an alcohol in the presence of a Lewis acid metal triflate catalyst, and recovering at least a portion of the catalyst from the reactor.
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Dependencies are inferred from the claim text.