How is Trioctyl borate (CAS: 2467-12-1) typically synthesized?

Trioctyl borate is typically synthesized by the reaction of boric acid with octanol in the presence of a base catalyst. The reaction is carried out at elevated temperatures, and the product is purified by recrystallization. The selectivity is high, and the yield is around 90%. This method allows for the production of a pure, crystalline product suitable for various applications.