Process for obtaining bis(2,4-di-tert-butylphenyl) halophosphites
AssigneeHoechst Aktiengesellschaft
InventorsManfred Bohshar, Hans-Jerg Kleiner
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Abstract
The invention relates to a process for obtaining phosphorus acid-bis(2,4-di-tert-butylphenyl) ester halides in which a phosphorus acid-2,4-di-tert-butylphenyl ester dihalide is heated in the presence of a catalyst containing nitrogen or phosphorus, or both, to 130.degree. C. to 280.degree. C. and the phosphorus trihalide produced by disproportionation is removed from the reaction mixture.
Claims17
Process for obtaining bis(2,4-di-tert-butylphenyl) halophosphites of the formula ##STR4## in which X is a halogen having an atomic weight of at least 35, which comprises heating a 2,4-di-tert-butylphenyl dihalophosphite of the formula (II) ##STR5## to 130.degree. to 280.degree. C. in the presence of a catalytically active compound containing nitrogen and/or phosphorus and removing the phosphorus trihalide, formed in this way by disproportionation, from the reaction mixture.
Dependencies are inferred from the claim text.