Gamma-butyrolactone (GBL) is the simplest aliphatic lactone comprising four carbon atoms. It plays a vital role in the production of various chemicals, including tetrahydrofuran (THF), methylpyrrolidone (NMP), N-ethylpyrrolidone (NEP), 2-pyrrolidinone, and polyvinylpyrrolidone (PVP), among others. This compound serves as a viscosity modifier in plant growth regulators, a rubber additive, and a...