Effect of Alkali Treatment of HY Zeolite on Continuous Synthesis of Triacetonamine

The continuous synthesis of triacetonamine from acetone and ammonia over HY was realized. Meanwhile, alkali‐treated HY with different structure and acidities were prepared and examined. The results indicated that the acid sites, especially Brønsted acid sites, played a vital role on the selectivity of triacetonamine and the conversion of acetone. It was further confirmed by X‐ray diffraction (XRD), N2 adsorption and desorption experiments, IR spectra of adsorbed pyridine, and NH3 temperature‐programmed desorption. Meanwhile, the generation mechanisms of triacetonamine and impurities were speculated.