SBA-15-Oxynitrides as a Solid-Base Catalyst: Effect of Nitridation Temperature on Catalytic Activity

2015 ◽  
Vol 127 (20) ◽  
pp. 6083-6087 ◽  
Author(s):  
Baljeet Singh ◽  
Kaustubh R. Mote ◽  
C. S. Gopinath ◽  
P. K. Madhu ◽  
Vivek Polshettiwar
Keyword(s):  
Catalytic Activity ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Catalyst Effect ◽  
Nitridation Temperature

SBA-15-Oxynitrides as a Solid-Base Catalyst: Effect of Nitridation Temperature on Catalytic Activity

2015 ◽  
Vol 54 (20) ◽  
pp. 5985-5989 ◽  
Author(s):  
Baljeet Singh ◽  
Kaustubh R. Mote ◽  
C. S. Gopinath ◽  
P. K. Madhu ◽  
Vivek Polshettiwar
Keyword(s):  
Catalytic Activity ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Catalyst Effect ◽  
Nitridation Temperature

Synthesis of curcumin catalyzed by KF/Al2O3

2016 ◽  
Vol 45 (4) ◽  
pp. 225-233 ◽  
Author(s):  
Lihong Gao ◽  
Jiang Chen ◽  
Jun Zheng ◽  
Haiyan Zhang
Keyword(s):  
Catalytic Activity ◽  
Photoelectron Spectroscopy ◽  
Condensation Reaction ◽  
Solid Base ◽  
Reactant Ratio ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
Synthetic Process ◽  
Content Type ◽  
X Ray

Purpose The purpose of the study reported in this paper is to synthesis curcumin, which was reported to possess broad pharmacological effects and excellent dyeing properties, via Claisen-Schmidt condensation reaction catalysed by an efficient and green solid base catalyst, KF/Al2O3. Design/methodology/approach A series of catalysts with different KF loadings and varying calcination temperatures had been prepared, characterised by Brunauer–Emmett–Taller surface area, temperature-programmed desorption with CO2 using infrared spectroscopy, X-ray powder diffraction and X-ray photoelectron spectroscopy, and tested in the Claisen–Schmidt condensation reaction. The effects of different reaction parameters such as temperature, the amount of catalyst, reactant ratio and time on the synthesis of curcumin were examined. The possibility of recycling the catalyst was also investigated in detail. Moreover, the reaction mechanism and the role of KF/Al2O3 in the synthetic process were discussed. Findings The study provides an efficient and green solid base catalyst, KF/Al2O3, and 64.3 per cent yield of curcumin was obtained under the optimum reaction conditions. Experimental results indicate that the third reused catalyst could retain part of the catalytic activity, and the regenerated one could be reused with reasonable catalytic activity. Besides, K3AlF6 was proposed as the active site of the catalyst for the reaction by the analysis of the characterization results of KF/Al2O3. Originality/value KF/Al2O3 was found to be an efficient catalyst for catalytic synthesis of curcumin and could be easily recycled several times. This information may be useful for further research and practical applications of curcumin.

scholarly journals Calcium Oxide from Limestone as Solid Base Catalyst in Transesterification of Reutealis trisperma Oil

2018 ◽  
Vol 16 (2) ◽  
pp. 208 ◽  
Author(s):  
Suprapto Suprapto ◽  
Tikha Reskiani Fauziah ◽  
Meiske S Sangi ◽  
Titie Prapti Oetami ◽  
Imroatul Qoniah ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Fourier Transform ◽  
Catalytic Activity ◽  
Transesterification Reaction ◽  
Molar Ratio ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst ◽  
X Ray ◽  
Ester Yield

CaO catalysts were synthesized from limestone by thermal decomposition and coprecipitation methods. The CaO and MgO reference catalysts were also synthesized for comparison. The catalysts were characterized by X-ray diffractometer (XRD) and the analysis result was refined by Rietica software. CaO catalyst obtained by coprecipitation method has higher purity of CaO and lower MgO content than those of calcined CaO. The catalysts were also characterized by Fourier Transform Infrared (FTIR) spectroscopy. FTIR spectra showed that the catalysts can be easily hydrated and carbonated in air. The catalytic activity of the catalyst was studied in transesterification reaction of Reutealis trisperma (Kemiri Sunan) oil with methanol. Transesterification reaction was carried out at oil to methanol molar ratio 1:1 and 1% of catalyst at 60 °C for 2 h. Catalytic activity of CaO catalyst obtained by coprecipitation was higher than calcined CaO. The methyl ester yield obtained from synthesized CaO, CaO from coprecipitation, calcined CaO, and synthesized MgO catalysts were 56.13; 37.74; 15.97; and 3.61%, respectively.

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

Transesterification of soybean oil to biodiesel using CaO as a solid base catalyst

Fuel ◽  
2008 ◽  
Vol 87 (2) ◽  
pp. 216-221 ◽  
Author(s):  
Xuejun Liu ◽  
Huayang He ◽  
Yujun Wang ◽  
Shenlin Zhu ◽  
Xianglan Piao
Keyword(s):  
Soybean Oil ◽  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst

Reconstructed Mg/Al hydrotalcite as a solid base catalyst for synthesis of jasminaldehyde

2010 ◽  
Vol 386 (1-2) ◽  
pp. 34-42 ◽  
Author(s):  
Sumeet K. Sharma ◽  
Parimal A. Parikh ◽  
Raksh V. Jasra
Keyword(s):  
Solid Base ◽  
Base Catalyst ◽  
Solid Base Catalyst
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