Stauffer Chemical Company

Alan J Abramson

Gershon J Davis

Edward D Weil

George C Ciomo

The color of alkyl vanadate compounds that have become discolored is improved by treating the vanadates with an oxygen-containing gas, e.g., air, preferably at elevated temperature.

Alkyl vanadate color improvement

The yield of alkyl vanadate formed by the reaction of vanadium pentoxide and an alkyl alcohol in the presence of an azeotroping agent and, preferably, a catalyst is improved by the present invention. It involves lowering, prior to the reaction, the amount of vanadium having a valence lower than +5 in the vanadium pentoxide reagent.

Process for the manufacture of alkyl vanadates

Alkyl vanadates are formed by the reaction of vanadium pentoxide and an alkyl alcohol in the presence of an azeotroping solvent to assist in the removal of byproduct water, using an effective amount of a basic nitrogenous compound as a catalyst.

Process for forming alkyl vanadates using a catalyst

An improved process for phosphite rearrangement wherein the phosphite is rearranged to the phosphonate. The improvement comprises conducting the phosphite rearrangement reaction in an aliphatic solvent which is miscible with the reactants at reaction temperatures, and immiscible with the product at lower temperatures. Increased yields of the phosphonate product are obtained without the need for additional distillation for solvent separation.

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White Plains, NY, United States of America

Alan J Abramson