Study on the synthesis of melem catalyst and its application in synthesis of cyclic carbonate

In this paper, a series of mesoporous melem materials were prepared from melamine by solid-phase reaction using nano-silica (SiO₂) as the template. The mesoporous melem materials with high specific surface area (40−92 m²/g) and pore volume (0.179−0.407 cm³/g) were obtained by adjusting the ratio of SiO₂ template and melamine. The obtained melem was used as catalyst for the cycloaddition reaction between BDODGE and CO₂. The results showed that the catalytic activity was greatly improved with the increase of specific surface area of the catalysts. The catalyst mp-CN-450-2 showed the best performance. After 20 h reaction at 130 ºC, 2.0 MPa, 99.3% of BDODGE conversion and 99.5% of cyclic carbonate selectivity were acquired, respectively.