Showing papers by "Gongying Wang published in 2013"
TL;DR: A zeolitic imidazolate framework (ZIF-8) was developed as a novel efficient heterogeneous catalyst for the synthesis of ethyl methyl carbonate from dimethyl carbonate and diethyl carbonate as discussed by the authors.
Abstract: A zeolitic imidazolate framework (ZIF-8) was developed as a novel efficient heterogeneous catalyst for the synthesis of ethyl methyl carbonate from dimethyl carbonate and diethyl carbonate. ZIF-8 was characterized by element analysis, X-ray powder diffraction (XRD), Fourier transform infrared (FT-IR), temperature programmed desorption (TPD), N2 adsorption–desorption and thermogravimetric analysis. The effects of catalyst amount, temperature and reaction time on the yield of ethyl methyl carbonate were also tested. The results showed that ZIF-8 performed excellent activity, selectivity and reusability under mild reaction conditions.
54 citations
TL;DR: In this article, a nano-Cu2O catalyst was used to obtain the optimal catalytic performance for methylene di(phenylisocyanate) (MDI) under solvent-free conditions.
5 citations
TL;DR: In this paper, metal-organic frameworks based on Zn2+ and different aromatic carboxylic acid ligands were prepared and characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy.
Abstract: Metal-organic frameworks based on Zn2+ and different aromatic carboxylic acid ligands were prepared and characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. They were then used as the catalysts for the transesterification between diphenyl carbonate (DPC) and 1, 4-butyldiol (1, 4-BD) to polycarbonate diol (PCDL). Their catalytic activities in the transesterification process were evaluated by the yield of phenol, and their catalytic activities in the polycondensation process were determined by the number-average molecular weight (Mn) and the hydroxyl value.
2 citations
1 citations
TL;DR: In this paper, a metal-organic framework based on Zn2+ and terephthalic acid (TPA) was prepared and characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy.
Abstract: Metal-organic framework based on Zn2+ and terephthalic acid (TPA) was prepared and characterized by X-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectroscopy. It was then used as the catalyst for the transesterification between diphenyl carbonate (DPC) and 1, 6-hexandiol (1,6-HD) to polycarbonate diol (PCDL). Compared to Mg-Al layered double hydroxide, triethylenediamine, sodium ethoxide and sodium methoxide, it exhibits the highest catalytic activity for the synthesis of PCDL. Under optimal reaction conditions(n(1,6-HD)/n(DPC) = 1.2, w(catalyst) = 0.03%, 198 °C), the yield of phenol is up to 90.1% in the transesterification process, and PCDL with higher Mn and lower hydroxyl value can be synthesized