Abstract：Aiming at the defects of low efficiency of γ-Al2O3 for regeneration of degradation products in anthraquinone process, γ-Al2O3-supported CaO/γ-Al2O3 catalysts with different CaO loadings were prepared via impregnation method. The effects of CaO loading on regeneration of the ethylanthraquinone working solution were investigated, and the optimized CaO loading was selected to be 3.0% (the catalyst is denoted as 3.0CaO/γ-Al2O3). On the basis of this, the CaO and MnO2 double modification catalysts were further prepared and the effects of MnO2 loading on 3.0CaO/γ-Al2O3 for regeneration of the ethylanthraquinone working solution were investigated, and the catalyst (3.0CaO0.5MnO2/γ-Al2O3) with a MnO2 loading of 0.5% had better performance. The physicochemical properties of three representative catalysts were characterized by X-ray fluorescence spectroscopy, N2 low temperature physisorption, and X-ray power diffraction. The results showed that compared with the unmodified γ-Al2O3 and 3.0CaO/γ-Al2O3, the double modified 3.0CaO0.5MnO2/γ-Al2O3 not only significantly promoted the regeneration of tetrahydro-2-ethyl-hydroxyl- anthrone(OXOH4eAQ) and 2-ethyl-tetrahydroanthraquinone epoxide(EPOXH4eAQ) in the working solution, but also accelerated the conversion of tetrahydro-2-ethylanthraquinone (H4eAQ) to 2-ethylanthraquinone. Therefore, the optimized 3.0CaO0.5MnO2/γ-Al2O3 catalyst has certain industrial application prospects.
Cheng Yi 1,2,3 et al. Catalytic Regeneration of Ethylanthraquinone Working Solution by CaO and MnO2 Double Modified γ-Al2O3 Catalyst[J]. 化学反应工程与工艺, 2018, 34(5): 431-439.
