Controlled temperature process for making 2,2'-oxodisuccinates u

Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acids and salts thereof

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562580, C07C 59235

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active

047989076

ABSTRACT:
High yields of 2,2'-oxodisuccinate are secured by reacting maleate and malate in aqueous alkaline media containing mixtures of particular divalent (e.g., Ca.sup.2+) and solubilizing monovalent (e.g., Na.sup.+) cations. In a preferred embodiment, the process has both an elevated temperature primary reaction step and one or more low temperature maturation steps. Yields of 2,2'-oxodisuccinate are increased and formation of fumarate byproduct is minimized.

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