Ethyl Corporation

Charles R Bergeron

Thomas J Walter

Alfred P Anderson

A process for purification of dialkyl phosphorochloridothioate by contacting a crude material containing oxygenated phosphorus compound impurities with an alcohol and separating the product dialkyl phosphorochloridothioate from the reaction product, for example, by distillation.

Process for the purification of dialkylphosphorochloridothioates

A process for the recovery of materials suitable for recycle to the manufacture of alkoxy or aryloxyphosphazenes including, inter alia, solvents, hydroxy compounds, acid acceptors and the like, from flash distillation of the washed phosphazene product together with a second vapor stream produced from the aqueous wash of the crude phosphazene product, whereby an aqueous phase and an organic phase are produced and recyclable materials are extracted from the aqueous phase into the organic phase, separating the organic phase from the aqueous phase and separating the organic phase into components by conventional methods which are suitable recycle streams for the phosphazene product manufacturing process.

Solvent recovery process

Improved fire retardant phosphonitrilate polymer compositions are prepared by reacting a chlorophosphazene with a metal alcoholate, preferably sodium propoxide, and an alkali metal hydroxide, preferably sodium hydroxide which is first prepared by mixing alcohol and water and adding this to a dispersion of alkali metal in a solvent.

Phosphonitrilate polymers and method of preparation

A method for the selective purification of phosphonitrilic chloride polymer mixtures to obtain substantially pure cyclic trimeric and tetrameric phosphonitrilic chloride polymers by distillaton under reduced pressure with inert solvent passed through the molten phosphonitrilic chloride mixture, optionally with prior solvent extraction and/or subsequent recrystallization from solvent.

Process for purification of phosphonitrilic chloride polymers

It is disclosed that amides are readily prepared by reacting an ester of a volatile alcohol with a volatile amine reactant in an anhydrous system and at moderate pressure. Excess amine reactant is fed to the reaction system and allowed to escape therefrom in the course of the reaction to remove alcohol liberated during the reaction.

Growing community of inventors

Baton Rouge, LA, United States of America

Charles R Bergeron