scholarly journals Preparation of polycarbonate diols (PCDLs) from dimethyl carbonate (DMC) and diols catalyzed by KNO3/γ-Al2O3

RSC Advances ◽  
2018 ◽  
Vol 8 (61) ◽  
pp. 35014-35022 ◽  
Author(s):  
Menglu Song ◽  
Xiangui Yang ◽  
Gongying Wang
Keyword(s):  
Dimethyl Carbonate ◽  
Potassium Nitrate ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst

γ-Al2O3 loaded with potassium nitrate (KNO3/Al2O3) catalysts were prepared, characterized and employed as a type of heterogenous solid base catalyst in the synthesis of polycarbonate (1,4-butane carbonate)-diol (PBC–OH) via the transesterification of dimethyl carbonate (DMC) and 1,4-butanediol (BD).

Effective synthesis of dimethylhexane-1,6-dicarbamate from 1,6-hexanediamine and dimethyl carbonate using 3-amino-1,2,4-triazole potassium as a solid base catalyst at ambient temperature

2016 ◽  
Vol 18 (24) ◽  
pp. 6681-6686 ◽  
Author(s):  
Peixue Wang ◽  
Yuqing Fei ◽  
Qinghe Li ◽  
Youquan Deng
Keyword(s):  
Ambient Temperature ◽  
Dimethyl Carbonate ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Effective Synthesis

Efficient syntheses of N-substituted carbamates from linear amines and dimethyl carbonate over KATriz catalyst at ambient temperature.

scholarly journals Synthesis of Glycerol Carbonate from Glycerol and Dimethyl Carbonate Catalyzed by Solid Base Catalyst Derived from Waste Carbide Slag

2021 ◽  
Vol 2021 ◽  
pp. 1-14
Author(s):  
Jianye Wang ◽  
Zhu Wang ◽  
Haifeng Liu ◽  
Song Wang ◽  
Yifeng Sun
Keyword(s):  
Dimethyl Carbonate ◽  
Molar Ratio ◽  
Solid Base ◽  
Glycerol Carbonate ◽  
Significant Activity ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Glycerol Conversion ◽  
Carbide Slag ◽  
Calcination Method

Na2CO3 was loaded onto waste carbide slag (CS) by impregnation-calcination method to prepare the solid base catalyst, which was used to synthesize glycerol carbonate (GC) by the transesterification of glycerol with dimethyl carbonate (DMC). The prepared catalysts were characterized by a scanning electron microscope (SEM), thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and Brunner−Emmet−Teller (BET) techniques. The catalyst 15 wt.% Na2CO3-CS-800, which was prepared by impregnating CS to the Na2CO3 solution with the concentration of 15 wt.% weight of CS and calcined at 800°C for 3 hours, showed an excellent catalytic ability. When it was applied in the catalytic synthesis of GC, 98.1% glycerol conversion and 96.0% GC yield were achieved in 90 mins at 75°C with the catalyst dosage of 3 wt.% to total reactants and the DMC to glycerol molar ratio of 5. More importantly, the loading of Na2CO3 can effectively improve the reusability of catalyst. The 15 wt.% Na2CO3-CS-800 can still achieve 83.6% glycerol conversion and 80.5% GC yield after five-time reuse. Meanwhile, under the same reaction conditions, the CS-800, which was obtained by calcining CS at 800°C for 3 hours, experienced significant activity reduction with only 15.2% glycerol conversion and 14.1% GC yield after five-time reuse. FTIR and XRD characterization revealed that CO32- might play a key role in preserving active catalytic CaO component by forming protective CaCO3 shell on the catalyst surface.

Transesterification of glycerol with dimethyl carbonate over nanocrystalline ordered mesoporous MgO–ZrO2 solid base catalyst

2015 ◽  
Vol 23 (1) ◽  
pp. 185-193 ◽  
Author(s):  
Mohan Varkolu ◽  
David Raju Burri ◽  
Seetha Rama Rao Kamaraju ◽  
Sreekantha B. Jonnalagadda ◽  
Werner E. Van Zyl
Keyword(s):  
Dimethyl Carbonate ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Ordered Mesoporous

Application of zirconia modified with KOH as heterogeneous solid base catalyst to new non-edible oil for biodiesel

2014 ◽  
Vol 80 ◽  
pp. 117-125 ◽  
Author(s):  
Mohammed Takase ◽  
Min Zhang ◽  
Weiwei Feng ◽  
Yao Chen ◽  
Ting Zhao ◽  
...  
Keyword(s):  
Edible Oil ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Heterogeneous Solid
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