Process for the synthesis of diethyl ethylphosphonate
AssigneeAkzo Nobel N.V.
InventorFred Jaffe
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Abstract
Diethyl ethylphosphonate is formed by the catalytic rearrangement of triethyl phosphite in a reaction medium at elevated temperature, preferably using an ethyl iodide as the rearrangement catalyst, employing a heel of diethyl ethylphosphonate in the reaction medium when the reaction is begun with maintaining of the reaction medium at a temperature above the boiling point of the triethyl phosphite (for example, a temperature of from about 175.degree. C. to about 185.degree. C.) and addition of the triethyl phosphite to the reaction medium at a rate slow enough to maintain that temperature.
Claims7
In a process for forming diethyl ethylphosphonate by the alkylating agent-catalyzed rearrangement of triethyl phosphite at elevated temperature, wherein the improvements comprise:
- having a heel of diethyl ethylphosphonate in the reaction medium when the reaction is begun;
- maintaining the reaction medium at a temperature above the boiling point of the triethyl phosphite;
- and
- adding the triethyl phosphite to the reaction medium at a rate slow enough to maintain that temperature.
Dependencies are inferred from the claim text.