Catalytic Characteristics of the Superbase Catalysts in the Synthesis Process of Tert-Amylbenzene with Sidechain Alkylation
Beijing Key Laboratory of Fuels Cleaning and Advanced Catalytic Emission Reduction Technology, College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
Abstract：The catalytic performance of the superbase catalysts was evaluated for side chain alkylation of cumene with ethylene in this paper. The effects of catalyst type, calcination temperature of carrier, loading amount of promoter, loading amount of alkali metal, and loading temperature on the catalytic performance were investigated. Lifetime test of the catalysts were also studied. For K/KOH/γ-Al2O3 catalyst, increasing loading amount of KOH and metal K resulted in volcano curves of the activity, and better activity of the catalyst could be achieved by calcination of the catalysts at elevated temperature. Moreover, the alkalinity, composition, and structure of superbase catalysts were characterized by CO2 temperature programmed desorption (CO2-TPD), Fourier infrared spectroscopy of CO2 preadsorbed (FT-IR) and X-ray diffraction (XRD). According to the experimental results, the optimum catalyst preparation conditions for catalysts were obtained. Under the optimal conditions of calcination temperature for carrier 550 ℃，loading amount of K 10% at temperature 290 ℃, loading amount of KOH 20% at 360 ℃, the cumene conversion could reach 99.8% with 97.9% selectivity to tert-amylbenzene.
PAN Jinwen,GAO Ge,HE Guangxiang et al. Catalytic Characteristics of the Superbase Catalysts in the Synthesis Process of Tert-Amylbenzene with Sidechain Alkylation [J]. 化学反应工程与工艺, 2019, 35(5): 393-401.
