FOOD CHEMISTRY
·
2024
·
IF 8.5
Yimei Wang,Yaoyao Zhang,Xing Qiao,Shangde Sun
Tyrosol is a natural phenolic compound with potent antioxidant properties in the field of food manufacturing. However, the low lipophilicity of tyrosol limited its application. Therefore, the construction of tyrosol laurate (Tyr-L) could effectively overcome the limitations of tyrosol. In this work, four ionic liquids (ILs) were applied for TYr-L preparation. Among them, the 1-butyl-3-methylimidazolium hydrogen sulfate ([Bmim]HSO 4 ) showed the best catalytic performance. The maximum TYr-L yield was achieved (94.24 ± 1.23 %) under the optimal conditions (reaction temperature 119 °C, substrate ratio 1:6.7, IL dosage 9.2 %, and reaction time 12 h). The kinetic and thermodynamic parameters were also evaluated and it was found that E a, Δ H , Δ S , and Δ G were 80.81 kJ·mol −1 , 77.63 kJ·mol −1 , −82.08 J·(mol·K) −1 , and 109.89 kJ·mol −1 , respectively. The acidic [Bmim]HSO 4 demonstrated excellent reusability and stability, even after 6 cycles. Furthermore, TYr-L showed superior ABTS radical scavenging ability, which could be further applied in various industrial processes.
研究领域:
化学
·
食品科学
·
催化
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING & TECHNOLOGY
·
2019
·Vol. 43
·期 3
·403-411
·
IF 2.418
Huan Li,Tian Ma,Zhensheng Shen,An Li,Jie Yang,Dong Xiang,Jiuyi Liu,Shuguang Deng,Yingqiang Sun
1-Butyl-3-methylimidazolium hydrogen sulfate ([Bmim][HSO 4 ]) is utilized to catalyze transesterification of camelina oil with methanol. The major compositions of camelina biodiesel are saturated fatty acid esters (C16:0, C18:0), monounsaturated, and polyunsaturated fatty acid esters (C18:2, C18:3). The effects of reaction temperature, reaction time, M methanol : M Camelina oil , and M [Bmim][HSO4] : M Camelina oil on biodiesel production are investigated in detail, and a general mathematical model is developed to well predict the biodiesel yield. Also, [Bmim][HSO 4 ] is thermally stable to recycle for four times with a high biodiesel yield. The fuel properties of camelina biodiesel are all comparable to the American Society for Testing Materials (ASTM) standards.
研究领域:
能源科学
·
化学工程
✓ 已验证
DOI
高影响因子
JOURNAL OF CHEMICAL THERMODYNAMICS
·
2018
·
IF 2.631
Qian Zeng,Biao Hu,Hongye Cheng,Lifang Chen,Junmei Huang,Zhiwen Qi
Isobutyl isobutyrate is an important chemical which can be formed in a reactive extraction process with ionic liquid as dual solvent-catalyst. To design such an intensified process, the liquid-liquid equilibria (LLE) data for the esterification system involving ionic liquid are essential. In this work, the LLE of ternary systems {isobutyl isobutyrate (IBIBE) + isobutyric acid (IBAc) or isobutanol (IBOH) + 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIm][HSO 4 ])} and the quinary system {IBAc + IBOH + IBIBE + H 2 O + [BMIm][HSO 4 ]} were measured at temperature T = (298.2, 323.2 and 353.2) K, T = (323.2, 333.2, 343.2 and 353.2) K and atmospheric pressure, respectively. Based on the experimental data, the solute distribution coefficient and the selectivity were determined, which confirms the feasibility of the ionic liquid for isobutyl isobutyrate formation. The phase behaviour was explained by the molecular interaction using σ -potential analysis. Moreover, the binary parameters of the NRTL model for [BMIm][HSO 4 ] catalysed isobutyl isobutyrate formation system were fitted.
研究领域:
化学工程
·
物理化学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2019
·
IF 4.888
Qian Zeng,Zhen Song,Hao Qin,Hongye Cheng,Lifang Chen,Ming Pan,Yi Heng,Zhiwen Qi
Butyl hexanoate (BuHE) is currently synthesized through the Fischer esterification with mineral acid as catalyst, which suffers from the problems of side reaction, difficult recycling, and corrosion. To overcome these disadvantages, ionic liquid 1-butyl-3-methylimidazolium hydrogen sulfate ([BMIm][HSO 4 ]) is employed as dual catalyst-solvent for the esterification of hexanoic acid (HeAc) with n-butanol (BuOH) in a reactive extraction process. The dual functions of [BMIm][HSO 4 ], extraction and catalysis, were confirmed by liquid-liquid equilibria for the two systems {[BMIm][HSO 4 ] + HeAc + BuHE} and {[BMIm][HSO 4 ] + BuOH + BuHE}, and by the comparison of esterifications with or without [BMIm][HSO 4 ], respectively. Moreover, the optimal reactive extraction conditions for BuHE formation were obtained. Finally, the possible mechanism of intensification of [BMIm][HSO 4 ] on BuHE formation in reactive extraction process was proposed.
研究领域:
化学工程
·
催化科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）