The Linde A-Type zeolite (LTA zeolite) was synthesized from ball clay through two steps of calcination at 600 °C with the addition of NaOH/Al(OH) 3 in a mass ratio of 1:1.2/0.43 and hydrothermal treatment at 60 °C for 48.0 h. A certain amount of 3.0 wt% Ru 3+ was introduced before the hydrothermal treatment, and the Ru 0 -nanoparticles were in-situ fixed in the zeolite in a facile way. The synthesized materials were characterized by X-ray diffraction, infrared spectroscopy , field-emission scanning electron microscopy, transmission electron microscopy , and X-ray photoelectron spectroscopy. The zeolite with LTA structure was successfully synthesized from ball clay, and the catalytic performance was checked by using hydrogenation of benzene at 150 °C and P H2 = 5.0 MPa, and the turnover frequency (TOF) of cyclohexane reached 4000 mol/(mol·h). The good stability was demonstrated by the high conversion of 94.0% and 98.0% of benzene after cycling use for many runs of catalysis and calcination at 550 °C.
A type of clay-supported catalysts was developed for cycloaddition of CO 2 by immobilizing metal-free ionic liquids (IL) on ball clay (BC) via a one-step strategy. The metal-free IL was loaded on the surface of BC via thermal and acid treatment. The synthesized materials (IL@P-BC) were characterized by Fourier transform infrared spectroscopy (FTIR), N 2 adsorption-desorption, and transmission electron microscopy (TEM). The composite IL@P-BC demonstrated excellent catalytic performance (yield 94.0%, selectively >99%) for coupling of CO 2 with epoxides to produce cyclic carbonates under the lack of any co-catalyst. The good recyclability and excellent suitability were obtained for the composite IL@P-BC. These experimental analyses deepen comprehension of the rational design of clay-based catalysts for CO 2 cycloaddition, further confirmed ball clay was a promising support.
危险品化学品经营许可证（带存储）