INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
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2018
·
IF 3.141
Xingang Li,Rui Wang,Jian Na,Hong Li,Xin Gao
The feasibility of employing reversible reactions to convert the separation of ethanediol (EG) and 1,2-butanediol (1,2-BDO) azeotropic system was analyzed in our previous work. This article aims at systematically screening the feasible reactants for the reaction-assisted separation process. A screening principle was brought up and applied. Through preliminary screening, acetic acid, acrylic acid, acetaldehyde, propionaldehyde, propanol, and butanone were obtained as potential reactants. Propionaldehyde was chosen as the proper one after fully comparing the reaction selectivity difference and conversion of EG and 1,2-BDO in the reaction process, the separation efficiency in the purification process, and final EG yield. The separation efficiency was predicted based on the relative volatility of EG, 1,2-BDO, and their corresponding products and was verified by distillation experiments. The stratification appeared in the reaction was found beneficial to the coupling of reaction and separation.
研究领域:
化学工程
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分离技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
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2019
·
IF 2.298
Chunli Li,Xuefei Wang,Hao Li,Cong Duan,Le An,Qing Liu
Experimental liquid–liquid equilibrium (LLE) data for the system ethylene glycol (EG) + 1,2-butanediol (1,2-BD) + 3-heptanone were measured at atmospheric pressure at 293.15, 303.15, and 313.15 K and the ternary LLE for systems of EG + 1,2-BD + anisole were also investigated at 303.15 K at 101.3 KPa by using liquid–liquid equilibrium kettle method. Distribution coefficient and selectivity were obtained and applied to evaluate the extraction capacity of 3-heptanone and anisole. The reliability of the experimental data was confirmed by the Hand correlation and the Othmer–Tobias correlation. The experimental LLE data were correlated by NRTL and UNIQUAC models, and the corresponding parameters were obtained. The root-mean-square deviations (RMSD) between the experimental data and calculated values were less than 1.22%. Topological concepts related to the Gibbs stability test were used to validate the consistency between model parameters and experimental data. The liquid–liquid equilibrium data provide the basic physicochemical properties for design of extraction process of 1,2-BD from EG by 3-heptanone and anisole. According to comprehensive correlation coefficient analysis, 3-heptanone is more suitable for the extraction of 1,2-BD from EG than anisole.
研究领域:
化学工程
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2019
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IF 5.107
Rui Wang,Xingang Li,Jian Na,Yan Wu,Runnan Zhao,Yutao Yan,Hong Li,Xin Gao
Reversible reaction-assisted technology for ethanediol (EG) and 1, 2-butanediol(1,2-BDO) azotropic mixture separation was proved effective. However, the missing acetalization kinetic parameters hinder the process design and industrialization. This paper addresses the competitive kinetics of EG and 1,2-BDO mixture towards propyl aldehyde. The reaction mechanism was illustrated, and the impacts of feed composition, temperature and solution inhomogeneity were explored. The pseudo-homogeneous model was derived for the system, and the kinetic parameters were obtained. Results demonstrated that the aldehyde and 2-ethyl-1,3-dioxione (2ED) inputs were crucial manipulation variables for reversible reaction-assisted separating (RRAS) process design. The RRAS process was proposed, based on the competitive kinetics, to evaluate the techno-economic performance of RRAS. Two promising processes, which differed in the conversion of EG, were proposed to implement the separation. The economic evaluation revealed that the flowsheet with EG and 1,2-BDO both being converted to acetals and EG then being recovered through 2ED hydrolyzation, has more potential for industrial application.
研究领域:
化学工程
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工业催化
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF THERMOPHYSICS
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2025
·Vol. 47
·期 1
·7
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IF 2.9
Zhang Qiang,Han Yongliang,Ren Jiayao,Wu Fangli,Zhang Rixin,Yang Yuxin,Bi Shengshan
The dispersion stability and thermophysical properties of ternary composite nanofluids (NF) containing graphene oxide (GO), aluminum oxide (Al 2 O 3 ), and silica (SiO 2 ) at different concentrations and ratios, with water-based ethylene glycol and 1,2-butanediol added as antifreeze agents, were investigated. First, the ternary nanofluid was prepared using a two-step method, and the prepared nanoparticles were characterized using field emission scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). The influence of surfactant addition on the stability of the nanofluid was analyzed. The density and thermal conductivity (TC) of NF were measured at different volume concentrations (0.2–0.6 vol%) and temperature ranges (298.15–333.15 K and 293.15–363.15 K, respectively). As the GO concentration increased, the proportion of thermal conductivity improvement showed a stepwise increase with concentration changes. When the GO concentration reached 80 % in the three types of nanoparticles, the thermal conductivity of NF at 363.15 K was 58 % higher than that of the base fluid. For the two different base fluids, under the same ratio, concentration, and temperature conditions, the base fluid containing 1,2-butanediol showed a more significant effect in enhancing thermal conductivity.
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产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Xin Gao,Yiwei Wang,Rui Wang,Chengna Dai,Biaohua Chen,Jiqin Zhu,Xingang Li,Hong Li,Zhigang Lei
1,2-Butene carbonate (BC) is an important five-membered cyclic carbonate with a high commercial value, but its massive production is limited by the lack of raw material 1,2-butanediol (1,2-BDO). 1,2-BDO is coproduced with ethylene glycol (EG) in the hydrogenation process in the coal-to-EG route, one-pot conversion of biomass to liquid fuels and chemicals, and fermentation of broths. However, the separation and purification of 1,2-BDO are difficult. In this paper, an intensified reactive distillation process for the separation of the EG and 1,2-BDO azeotropic mixture via dimethyl carbonate assisted chemical looping technology and coproduction of BC and EG products is proposed. The transesterification reactions of EG and 1,2-BDO were investigated individually in the presence of basic resin catalyst KIP321, and the kinetic parameters were imbedded into Aspen plus (V11) for the design of the reactive distillation column to perform the transesterification process. The proposed flowsheet, which includes the transesterification unit, a DMC and methanol separation unit, and an EG recovery unit, was designed and simulated. Remarkably, the conversions of diols are over 0.998, the yield of 1,2-butylene carbonate is 99.86%, and the yield of the EG product is theoretically 100%, which shows excellent potential for industrial application.
研究领域:
化学工程
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工艺化学
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催化
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分离技术
✓ 已验证
产品关联
DOI
高影响因子
Reaction Chemistry & Engineering
·
2022
·Vol. 7
·期 12
·2636-2649
·
IF 5.2
Chunrui Han,Rui Wang,Chang Shu,Xingang Li,Hong Li,Xin Gao
Reactive distillation is an effective technique for separating azeotropic systems, especially ethylene glycol (EG) and 1,2-butanediol (1,2-BDO), and mastering the reaction network and competitive kinetics is vital for the successful design of a reactive distillation process. Herein, a reactive distillation process using dimethyl carbonate (DMC) as a reactant to recover EG and the high-value-added byproduct 1,2-BC was developed. The reaction systems EG–DMC, 1,2-BDO–DMC, and EC–1,2-BDO were investigated through experiments in the presence of the catalyst KIP321p and the kinetic parameters were subjected to regression analysis; a unified power-law model describes the kinetics of transesterification reactions very well. The heat absorption values of the EG–DMC and 1,2-BDO–DMC systems are 7.18 kJ mol−1 and 9.56 kJ mol−1, respectively; as EG has fewer ethyl groups in its molecular structure than 1,2-BDO, this lower spatial resistance resulted in a faster reaction rate under the same conditions. The enthalpy change of the EC–1,2-BDO system is 1.53 kJ mol−1, and the small positive value indicates that BC is more thermodynamically stable than EC. The transesterification of EG/1,2-BDO with DMC was also investigated experimentally, and the experimental data were compared with the predicted results from the reaction kinetic models obtained in this work. These kinetic parameters can be employed to design reactive distillation methods for the implementation of transesterification reactions of mixed glycols with DMC.
研究领域:
化学工程
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反应动力学
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过程设计
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热力学
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2024
·
IF 8.1
Qiyu Meng,Yupei Wang,Meng Rong,Huifang Xing,Liangrong Yang,Huizhou Liu,Ru-An Chi,Congmei Chen
The separation of 1,2,4-butanetriol (BT) through phenylboronate anion reactive extraction in fermentation broth has been proposed based on the process where the boronic acid groups specifically recognize the cis -dihydroxyl groups. To fully elucidate the affinity process of boronic acid group and polyols, here we have investigated the binding constant ( K a ) and thermodynamic data of four phenylboronic acid derivates (PBADs) and four structurally similar linear polyols (BT, 1,2-butanediol (1,2-BD), 1,3-butanediol (1,3-BD), and 1,4-butanediol (1,4-BD)) through fluorescence spectroscopy, isothermal titration calorimetry (ITC), and computational chemistry. It can be concluded that the substituent group of boronic acid, the numbers and relative positions of the hydroxyl group in polyols affected the affinity of the boronic acid group to it. The ionized boronic acid group preferentially reacts with the 1,2-dihydroxy group to form a pentacyclic phenylboronate. Compared with other three butanediols, phenylboronic acid (PBA) has a larger binding constant and shows a smaller Gibbs free energy change with BT.
研究领域:
化学
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材料科学
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分析化学
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物理化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xianqiang Zeng,Chen Liu,Xue Wang,Yan Cao,Peng He,Huiquan Li,Liguo Wang
The demand for underwater pressure sensitive adhesives (PSAs) is rapidly increasing in fields such as underwater engineering and biomedicine. However, the achievement of underwater adhesion of PSAs remains a challenge because of the hydration layer that hinders the interaction between the adhesive and the substrate. Herein, a new type of underwater PSA was synthesized by the copolymerization of hydrophobic unsaturated poly(1,2-butylene oxide) (UPBO) and hydrophilic itaconic acid monomers using solvent-free ultraviolet curing. The PSA has demonstrated substrate-independent underwater adhesion strengths ranging from 108 to 141 kPa on both hydrophilic (glass, wood, steel) and hydrophobic (PET, PMMA, PTFE) substrates. The underwater adhesion performance of PSA remains stable during 30 adhesion–detachment cycles and incubation in water for 20 days. Notably, PSA shows cytocompatibility, antimicrobial, and degradable properties and can be used for rapid hemostasis of skin wounds. Experimental characterizations confirm that the process of underwater adhesion is achieved by hydrophobic alkyl side chains of the PBO chain segments, which repel water at the adhesive–substrate interface. This study should provide both practical and facile design strategies for multifunctional underwater PSAs that can be used in a variety of applications.
研究领域:
材料科学
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聚合物化学
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生物医学工程
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水下工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
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