|4465636||Process for the manufacture of alkyl vanadates|
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...
|4465637||Alkyl vanadate color improvement|
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....