Process for preparing dimethyl propanephosphonate
AssigneeBayer Aktiengesellschaft
InventorsJan-Gerd Hansel, Gert Jabs, Johannes Kaulen, Hans-Georg Adams, Hans-Günter Fröhlen
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Abstract
Process for preparing dimethyl propanephosphonate, characterized in that dimethyl phosphite is reacted with propene in the presence of a free-radical former at a reaction temperature of 60 to 95° C., the half life of the free-radical former being 0.1 to 20 min at the reaction temperature.
Claims12
Process for preparing dimethyl propanephosphonate, comprising reacting dimethyl phosphite with propene in the presence of a free-radical former at a reaction temperature of 60 to 95° C., the half life of the free-radical former being 0.1 to 20 min at the reaction temperature,
- wherein the dimethyl propanephosphonate is prepared at a yield that is more than 95% and formation of trimethyl phosphate in the amount of more than 0.1% by weight is avoided.
Dependencies are inferred from the claim text.