化学工业与工程
Home  |   |  About Journal  |  Editorial Board  |  Instruction  |  Subscriptions  |  Download  |  Publication Ethics  |  Contacts Us  |  Chinese
化学工业与工程
 
Office  
Author Center
Peer Review
Editor Work
Office Work
Editor-in-chief
Journal  
Current Issue
Next Issue
Archive
Advanced Search
Read Articles
Download Articles
Email Alert
  Current Issue
 
2025 Vol.42 Issue.1,Published 2025-01-15

0
2025 Vol. 42 (1): 0-0 [Abstract] ( 28 ) [HTML 1KB] [ PDF 934KB] ( 28 )
1 Optimization of preparing crude microcrystalline cellulose from okara by response surface methodology
XU Lu, SUN Chongqing, XU Dehua, YAN Zhengjuan, LI Xue, ZHONG Benhe, WANG Xinlong
In this study, crude microcrystalline cellulose (CMCC) was prepared from soybean residue(okara) through combined treatment of potassium hydroxide and wet-process phosphoric acid. The crystallinity index was chosen as the response value and single factor experiments, Plackett-Burman experiments, and response surface methodology were used to optimize process conditions. The results suggested that alkali treatment temperature, acid treatment temperature, and acid treatment time had a significant impact on crystallinity index of CMCC and the optimal process conditions were identified as alkali treatment temperature 90 ℃, alkali treatment time 60 min, potassium hydroxide solution concentration 4%, wet-process phosphoric acid concentration 35%(P2O5), acid treatment time 60 min, and acid treatment temperature 95 ℃. The confirmatory experiment indicated the crystallinity index of CMCC was 42.89% under optimal conditions, which was only 0.12 percentage points lower than the predicted value, indicating that the optimization results obtained by the response surface optimization method are reasonable and feasible.
2025 Vol. 42 (1): 1-8 [Abstract] ( 13 ) [HTML 1KB] [ PDF 2808KB] ( 34 )
9 Efficient synthesis of 2,2’-bis(2-oxazoline) from dimethyl oxalate
GE Haodong, WU Linbo
In view of the problems in the synthesis of 2,2’-bis(2-oxazoline) (BOZ), such as high cost of raw materials, long reaction time, low yield and complex purification, BOZ was synthesized from dimethyl oxalate (DMO) and ethanolamine (MEA) via a three-step method. The optimum conditions were as follows: First, in ethanol, DMO and MEA reacted at molar ratio of 1∶2.6 at 40 ℃ for 20 min to obtain N,N-bis(2-hydroxyethyl) acetamide (BHEOA). Then in toluene, BHEOA and SOCl2 reacted at molar ratio of 1∶3 at 50 to 90 ℃ to obtain N,N-bis(chloroethyl) acetamide (BCEOA). Finally, in ethanol containing water absorbent, BCEOA and NaOH reacted at molar ratio of 1∶2 at reflux temperature for 1 h to obtain BOZ. The yields of the three steps were 98.1%, 96.3% and 73.6% respectively. After secondary crystallization of the filtrate in the third step, the yield increased to 85.8%.
2025 Vol. 42 (1): 9-18 [Abstract] ( 18 ) [HTML 1KB] [ PDF 2234KB] ( 41 )
19 Synthesis of organogelators with AIE characteristics and their reversible acid/base response properties
ZHANG Jiacai, DUAN Xingyu, SUN Yiping, ZHANG Xiaokun, QU Hongmei
Two coumarin organogelators with aggregation-induced emission (AIE) characteristics, cou-C8b and cou-C10b, were synthesized. They can form stable gels in several alcoholic solvents (such as ethanol, isopropanol and tert-amyl alcohol) and acetone, and multiple cycle transitions of sol-gel can be achieved by heating-cooling treatment. The Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), scanning electron microscope (SEM) and concentration-dependent 1H NMR indicated that hydrogen bonds, π-π interactions and van der Waals forces promoted the self-assembly process. The optical properties of two organogelators were studied by UV-Vis absorption spectra and fluorescence spectra, and it was indicated that the hot sol states exhibited almost none or very weak fluorescence, while the gel states appeared strong yellow fluorescence after cooling, showing an obvious AIE effect. Furthermore, the theoretical calculation indicated that the AIE effect may be due to the intermolecular non-covalent interactions which caused the restriction of the intramolecular motions (RIMs). In addition, these two organogels showed reversible acid/base response properties, after the addition of NaOH solution, the gel structures collapsed and showed bright cyan-blue fluorescence, while the samples can restore gels again and recover the original yellow fluorescence with the addition of HCl solution. This result indicates that this type of organogelators has the potential application value in the manufacture of light-emitting nanostructured devices.
2025 Vol. 42 (1): 19-31 [Abstract] ( 16 ) [HTML 1KB] [ PDF 7086KB] ( 25 )
32 Controllable synthesis of poly (methyl methacrylate-1-decene) as viscosity index improver
DING Liqin, LIU Sifan, LIU Xinyi, XU Haisheng, LIANG Shengrong
The copolymerization of methyl methacrylate and 1-decene initiated by azodiisobutyronitrile (AIBN) in xylene solution was studied using Schiff base Ni complex as catalyst. The process conditions of the polymerization reaction were optimized by single factor method. The structure and properties of the polymer were characterized by GPC, FT-IR, 1H NMR and TGA, and its viscosity-temperature performance was evaluated. The results show that when the mass ratio of 1-decene to MMA is 1∶2, the amount of initiator is 0.5% of the total monomer mass, and the molar ratio of catalyst to initiator is 1∶100 at 90 ℃ for 10 h,the catalytic activity is 1.021×105 g·mol-1·h-1. The number average molecular weight of the copolymer (PDM) ranges from 1.05×104 to 1.26×104 and the polydispersity index PDI ranges from 1.31 to 1.82, the reaction is controllable. The initial decomposing temperature of copolymer is 264 ℃, indicating that the polymer has good thermal stability. Adding 0.5% copolymer to the Yumen lubricating base oil can increase the viscosity index by 31. Therefore, the copolymer PDM can be used as a viscosity index improver.
2025 Vol. 42 (1): 32-40 [Abstract] ( 17 ) [HTML 1KB] [ PDF 2697KB] ( 35 )
41 Efficient preparation of amphiphilic particles and analysis of their application prospects in oil recovery
SHI Lei, MA Zhi, YAN Haijun, ZANG Long, CAO Jie, SONG Ying, GUO Jintang
In view of the poor ability of nanoparticles to reduce the oil-water interface and emulsify in the displacement process, Janus nano-SiO2 with amphiphilic structure was successfully prepared by asymmetric modification of nano-SiO2 through pickering lotion interface protection method. Through verification, the lipophilic modifier hexadecyl trimethoxysilane was successfully introduced, and almost all of the nano-SiO2 was successfully protected by paraffin during the preparation process, and amphiphilic Janus nano-SiO2 was successfully prepared. By this method, Janus nano-SiO2 can be efficiently and simply prepared in large quantities, providing a basis for large-scale application needs in the oil field. Janus nano-SiO2 has stronger emulsifying ability and stability compared to hydrophilic and lipophilic nano-SiO2, so its oil carrying capacity is stronger. In the case of high water cut in the reservoir, the lotion droplets formed by Janus nano-SiO2 float on the water phase and can be brought out with the movement of water to improve the oil recovery of the reservoir; Janus nano-SiO2 can form a stable lotion layer at a lower concentration, which is conducive to cost saving and has application prospects in the oil field.
2025 Vol. 42 (1): 41-46 [Abstract] ( 20 ) [HTML 1KB] [ PDF 3479KB] ( 30 )
47 Effect of drug loading on the formation of insulin-contained W/O microemulsion
YANG Xu, YU Zhanfeng, WEI Zhenping
The advantages of microemulsion as an oral insulin carrier are its high dispersibility and retention of insulin biological activity, which benefit insulin intestinal absorption. Traditional formulation screening method of insulin-contained microemulsion (ICME) usually based on the addition of insulin to the insulin-free microemulsion (IFME) after IFME formulation is determined by pseudo-ternary phase diagram. However, as a biomacromolecule, insulin has effect on oil-water interface tension and structure, which means the pseudo-ternary phase diagram will change after adding insulin. In such situation, the stability of ICME will be impacted. In this study, pseudo-ternary phase diagrams of IFME and ICME were compared and the optimized formulation of ICME was determined. Results showed that the addition of insulin changed the microemulsion area in pseudo-ternary phase diagram and the maximum range is 56.1%. Based on ICME pseudo-ternary phase diagram, the optimal formulation of ICME was determined as Span-80 22.6%, Tween-80 9.7%, ethanol 8.1%, isopropyl myristate (IPM) 40.4% and aqueous phase 19.2%(mass fraction), with a diameter of 84.25 nm. The result in this experiment is valuable for the formulation screening of drug-contained microemulsion.
2025 Vol. 42 (1): 47-53 [Abstract] ( 22 ) [HTML 1KB] [ PDF 3489KB] ( 45 )
54 Investigation of the preparation and desalination property of magnetic chitosan hybrid nanofiltration membranes
DENG Bo, GUO Shiqi, WU Yonghong, HUANG Heming, ZHANG Bing
Nanofiltration membranes were prepared using polyacrylonitrile as membrane matrix and magnetic chitosan (MCs) as dopant. The thermal stability and surface functional groups of the membranes were correspondingly characterized by thermogravimetric analysis and infrared spectroscopy. The effects of some factors including dopant content, feed concentration and trans-membrane pressure on the desalination of the membranes were investigated. The results show that the thermal stability of the nanofiltration membrane increases, and the Ca2+ rejection first increases then decreases, with the increasing of MCs content in membranes. The Ca2+ rejection can reach to 100% for the as-prepared nanofiltration membranes with MCs content of 2% in raw materials under the conditions of feed concentration of 40 mg·L-1 and transmembrane pressure of 0.10 MPa.
2025 Vol. 42 (1): 54-58 [Abstract] ( 20 ) [HTML 1KB] [ PDF 2452KB] ( 38 )
59 Laccase-like activity of Mn3O4 nanoparticles and its application in degrading acridine orange
HAN Qian, GE Zhiqiang
Natural laccase suffers from several inherent drawbacks, such as complex purification process, poor stability and high cost, significantly constraining their practical applications. The construction of inorganic nanozymes with laccase activity is a promising strategy to overcome these limitations. In this study, Mn3O4 nanoparticles were prepared using a chemical precipitation method. The laccase-like activity was evaluated using 2,4-dichlorophenol as the substrate. Additionally, the removal performance of the nanoparticles towards AO in aqueous solution was investigated. This study shows that Mn3O4 nanoparticles have redox activity similar to laccase, and enzyme kinetics experiments demonstrate that Mn3O4 nanozyme has higher catalytic efficiency than natural laccase at the same concentration. Furthermore, Mn3O4 nanozyme have a wider temperature (25—75 ℃) and pH (6—7) tolerance range, and the storage stability at room temperature is significantly higher than that of natural laccase. In the presence of the redox mediator HBT, Mn3O4 nanoparticles can swiftly and effectively remove AO from aqueous solution, with a removal efficiency of 70% in just 5 min. Therefore, Mn3O4, as a laccases-like nanozyme, has excellent developing potential in treatment of dye wastewater due to high catalytic activity, superior storage stability, simplicity of preparation and low cost.
2025 Vol. 42 (1): 59-68 [Abstract] ( 21 ) [HTML 1KB] [ PDF 4635KB] ( 39 )
69 Preparation and properties of (NixCo1-x)0.85Se nano spherical cathode material for supercapacitor
ZHANG Weiguo, CHEN Guangyao, WANG Hongzhi, YAO Suwei
Ni-Co bimetal selenide (NixCo1-x)0.85Se electrode material was prepared by solvothermal method. The microstructure and elemental composition of the electrode material were measured by XRD, SEM, TEM and XPS. The electrochemical properties of the electrode material were tested by three-electrode system. (NixCo1-x)0.85Se presents a nano-spherical structure with a diameter of 200—500 nm. By adjusting the experimental conditions, the materials with different Ni/Co ratios were synthesized, in which (Ni0.50Co0.50)0.85Se had the maximum specific capacitance (2 900 F·g-1, 1 A·g-1). (Ni0.50Co0.50)0.85Se was assembled with activated carbon to form hybrid supercapacitor, and the cycle stability was good (the capacitance retention rate was 83.21% after 2 500 charge-discharge cycles at 1 A·g-1 current density), indicating that Ni-Co selenide has high application value in the field of supercapacitor.
2025 Vol. 42 (1): 69-77 [Abstract] ( 21 ) [HTML 1KB] [ PDF 5679KB] ( 35 )
78 Progress in chemical detection and treatment technology for decomposition products of SF6 in power equipment
ZHANG Wen, JIA Qinxiang, SUN Jiahong, NIU Feiyu, WU Yuying
Sulfur hexafluoride (SF6) is widely used in various medium and high voltage electrical equipment because of its excellent insulation and arc extinguishing performance. However, when there is a small amount of water, oxygen and other impurities in the equipment, SF6 will decompose and generate many kinds of complex products. The generation mechanism of decomposed products, trace chemical detection methods and catalytic degradation are discussed from the chemical point of view, current adsorption treatments and trace detection technologies of impurity gases are summarized and the new insulating gases that may replace SF6 are proposed.
2025 Vol. 42 (1): 78-87 [Abstract] ( 16 ) [HTML 1KB] [ PDF 1514KB] ( 36 )
88 Preparation and application of α-Fe2O3/reduced graphene oxide (RGO)
WANG Hongzhi, BAO Saisai, SU Zhan, YU Jinshan, ZHANG Weiguo
The α-Fe2O3/RGO composite with α-Fe2O3 nanoparticles (FeCl3·6H2O as the iron source) uniformly dispersed on reduced graphene oxide (RGO) flakes was successfully prepared by a hydrothermal method to achieve high electrochemical performance of asymmetric supercapacitors (ASCs). It was characterized by SEM, TEM, XRD, and XPS. And electrochemical properties were tested using a standard three-electrode system. The results show that the highly assembled α-Fe2O3/RGO has a large specific capacitance of 740.8 F·g-1 at 1 A·g-1 and a long cycle stability of 80.0% (10 000 cycles) at 5 A·g-1. The NiCo2O4//α-Fe2O3/RGO asymmetric supercapacitor was assembled with the prepared α-Fe2O3/RGO as the negative electrode and NiCo2O4 as the positive electrode. The energy density of 47.8 Wh·kg-1 was obtained at 792.8 W·kg-1, and 78.6% cyclic stability (10 000 cycles) was maintained at 5 A·g-1. This greatly promotes the application of ASCs in energy storage systems.
2025 Vol. 42 (1): 88-97 [Abstract] ( 18 ) [HTML 1KB] [ PDF 6943KB] ( 30 )
98 Research progress on performance evaluation methods for vapor phase corrosion inhibitors
DING Yao, LI Wenqiang, WEN Yonghong, ZHAN Tianrong
Vapor phase corrosion inhibitor, as a rust prevention method with long anti-rust period, simple operation and low cost, has attracted much attention and made great progress in recent years. With the emergence of various vapor phase corrosion inhibitors, how to evaluate the effect of a vapor phase corrosion inhibitor more effectively and comprehensively has become particularly important. The evaluation methods of the corrosion inhibition performance of vapor phase corrosion inhibitors are reviewed, including conventional experimental methods, electrochemical evaluation methods, modern analytical testing methods and structure-activity relationship calculation methods, and the development trend of their evaluation methods is prospected.
2025 Vol. 42 (1): 98-105 [Abstract] ( 17 ) [HTML 1KB] [ PDF 1241KB] ( 38 )
106 Determination of two genotoxic impurities in sulconazole nitrate by combining derivatization with LC-MS method
GUO Zhiqiang, LI Tiejun, SUN Yingji, LI Peipei, WANG Qi
An analytical method was established for the determination of alkyl sulfate esters genotoxic impurities in sulconazole nitrate, including dimethyl sulfate and diethyl sulfate. The separation was performed on an HILIC column(2.1 mm×50 mm, 3 μm) utilizing the aqueous phase of 20 mmol·L-1 ammonium formate solution-formic acid (1 000∶1) and the organic phase of acetonitrile with isocratic elution(10∶90) at the flow rate of 0.2 mL·min-1. The column temperature was set at 20 ℃. Multiple reaction monitoring (MRM) mode was performed on quantitative determination. Effects of temperature and time for derivatization were investigated. Under the conditions, the linear correlation coefficient of dimethyl sulfate and diethyl sulfate were 0.999 7 and 0.998 9, respectively. And the recovery were 80.3%—102.3% and 90.3%—100.0%, respectively. The operation is simple and meets the requirements of quantitative analysis.
2025 Vol. 42 (1): 106-112 [Abstract] ( 16 ) [HTML 1KB] [ PDF 2473KB] ( 36 )
113 Research and development of helium-extraction from natural gas
WANG Zi, ZHU Lin, YANG Zhe, ZENG Xingyan, WANG Yuan, FAN Junming
Helium is a strategic resource widely used in defense and high-tech industries. The main source of industrialization in helium extraction is helium-type natural gas. There are few natural gas resources containing helium in China’s proven natural gas, and a small amount of natural gas resources containing helium also have low helium content. Helium resources are extremely precious and difficult to extract. The technology at home and abroad is introduced and summarized: PSA (pressure swing adsorption) method and membrane separation method own the simple flow and high purity of helium product; cryogenic method, although it suffers from high consumption in energy, is a mature technology with high recovery of helium and is currently the widely used technology. Integrated helium-extraction technologies are a combination of multiple technologies for separation, such as helium extraction integrated with cryogenic method and membrane separation, light hydrocarbon recovery and denitrification, hydrate and catalytic dehydrogenation, which improving the recovery and purity of helium and reduced the cost, thus have broad prosperity of application.
2025 Vol. 42 (1): 113-129 [Abstract] ( 23 ) [HTML 1KB] [ PDF 6831KB] ( 44 )
130 Hydrodynamic calculation of structured packing column based on neural network and CFD
LI Xing, ZENG Aiwu
A multi-scale calculation method combining computational fluid dynamics (CFD) and back propagation neural network (BPNN) was proposed to calculate the hydrodynamic behavior of structured packing column. According to the actual size of the representative elementary units, a small-scale 3D CFD model was established, and the flow distribution of single gas phase and gas-liquid two-phase fluid in the packing column was studied, which made up for the defects in the pressure drop of the column wall unit and the interlayer conversion unit. A node network model was established to calculate the macroscopic information such as the fluid distribution of the whole column. Two neural network models were trained with the data set collected by CFD calculation, and the dry pressure drop and liquid holdup were calculated respectively with the node flow as input neuron. Compared with the relevant experimental data, the average relative deviation of the prediction model for dry pressure drop was 8.63% and the maximum relative deviation was 14.2%. The average relative deviation and maximum relative deviation of the prediction model for liquid holdup were 9.63% and 13.97%, respectively. The trained artificial neural network model was proved to be prospective to determinate dry pressure drops and liquid holdup of structured packing columns.
2025 Vol. 42 (1): 130-137 [Abstract] ( 21 ) [HTML 1KB] [ PDF 2774KB] ( 30 )
138 Dynamic simulation of mass transfer-reaction process in three-phase internal air-lift reactor
SONG Zihang, CAI Wangfeng, WANG Yan
The three-phase internal air-lift reactor is widely used in fields such as sewage treatment and microbial cultivation. In this paper, a dynamic mass transfer-reaction model for the three-phase internal air-lift reactor is established, the model calculates the distribution and variation of the operation parameters such as gas-holdup, circulation liquid velocity, and oxygen content in the gas and liquid phases along the axial direction. At the same time, the model calculates the ratio of gas holdup between the downcomer and the riser and the gas reflux ratio at the top of the reactor under different operating conditions, with values ranging from 0.75—0.89 and 0.44—0.52, respectively. Finally, the microbial first-order reaction kinetics equation is used to simulate the process of phenol degradation to verify the accuracy of the model. The calculated results are compared with experimental data from the literature, and the relative errors between the simulated values and experimental data under different operating conditions are shown to be 8.81% and 6.86%, respectively, which demonstrates the good reliability.
2025 Vol. 42 (1): 138-147 [Abstract] ( 21 ) [HTML 1KB] [ PDF 4702KB] ( 33 )
148 Characteristics of mass transfer and pressure drop of a new structured packing
QIN Tao, ZHU Huiming
A flow dynamics and mass transfer CFD model was established based on non-intrusive surface reaction gas mass transfer experiments which were carried out to measure the distribution of mass transfer coefficient on the surface of structured packings. A new type of packing was developed using the CFD model and orthogonal experiments. The channel shape of the new packing is modified from the traditional triangle to a quadrangle to increase the hydraulic radius. The CFD simulation results show that the new packing with optimized geometry can reduce the pressure drop by 22.22%~23.03% while maintaining good mass transfer performance.
2025 Vol. 42 (1): 148-156 [Abstract] ( 20 ) [HTML 1KB] [ PDF 2992KB] ( 38 )
157 Numerical simulation and verification of flow characteristics of asphalt-based spherical activated carbon gas-solid fluidized bed
GE Qiannan, YANG Zhen
The hydrodynamic behavior of a gas-solid fluidization bed of asphalt-based spherical activated carbon is numerically simulated and experimentally verified in conjunction with particle flow dynamics theory. The hydrodynamic properties of two-dimensional gas-solid fluidized beds were investigated using the computational fluid dynamics software ANSYS Fluent. A multi-fluid Eulerian model is used to analyze the simulation results of five traction models, numerical parameters, inlet velocity, bed pressure drop, and expansion height by comparing cold-mode tests. It is shown that the numerical calculation parameters of the gas-solid fluidized beds under the Syamlal-O’Brien model are best simulated using a second-order discrete format with a time step of 0.000 1 s and a convergence criterion of 10-3. The ideal speed for bed operation is between 0.35 and 0.45 m·s-1 when the particles in the bed are fluidized. The experimental and simulated results for bed pressure drop and expansion height are verified to be in good agreement.
2025 Vol. 42 (1): 157-164 [Abstract] ( 19 ) [HTML 1KB] [ PDF 3438KB] ( 28 )
165 Process simulation of CHF3/N2 separation by pressure swing adsorption using SIFSIX-3-Ni
ZHANG Qicheng, CHEN Xia, ZHANG Donghui, WANG Ming, ZHANG Hui, DONG Zixu, WANG Shoudong, FU Qiang
The adsorption column was filled with SIFSIX-3-Ni (MOF) as the adsorbent. The purification process of CHF3 from CHF3/N2 mixture by pressure swing adsorption (PSA) was simulated by a two-bed six-step model using Aspen adsorption. The effects of adsorption pressure, feed flow rate, adsorption time, pressure equalization time, blow down time and vacuum degree on the purity and recovery of CHF3 were studied. The optimum process simulation conditions have been achieved when the adsorption pressure, feed flow rate, adsorption time, pressure equalization time, blow down time and vacuum degree are 1.5 bar, 0.6 m3·h-1, 165 s, 22 s, 95 s, 0.1 bar, respectively. Under this condition, the purity of CHF3 is above 99% and the recovery is above 90%.
2025 Vol. 42 (1): 165-172 [Abstract] ( 17 ) [HTML 1KB] [ PDF 3401KB] ( 41 )
173 Integrated DNA storage system for massive digital data
WEI Yanan, LIU Qian, QI Hao
With the advent of the big data era, the total amount of digital data generated in the world has grown explosively. Due to the natural advantages of extremely high theoretical storage density and long storage time, DNA is considered to provide stable and low-cost storage for massive data. Since the concept was proposed, DNA storage technology has made progress in core aspects such as encoding and decoding algorithms, data recovery and repetitive reading. However, it is still difficult to imagine how the information storage technology based on biomolecular DNA can realize large-scale and stable digital information storage. There is a huge gap between the storage capacity of any reported DNA information storage prototype system and the actual information storage demand. Therefore, in order to realize practical information storage of DNA molecules, in addition to solving the problem of core synthesis cost, there is still a lack of technology for stable preservation and high integration of DNA stored in different files, and when faced with massive data storage, it is necessary to design appropriate indexes for DNA libraries to achieve specific file retrieval, and how to interface with existing electronic systems for DNA biomolecule storage devices. This review focuses on the impact of storage methods on the physical storage density of DNA and file retrieval methods, and introduces the methods of file retrieval and research progress in the development of automated equipment, in order to promote DNA with high physical storage density and convenient file selective retrieval and development of storage systems to facilitate commercial applications of integrated DNA data storage.
2025 Vol. 42 (1): 173-182 [Abstract] ( 20 ) [HTML 1KB] [ PDF 3436KB] ( 63 )
News More
· 《化学工业与工程》入编2020年版《中文核心期刊要目总览》
·
· 《化学工业与工程》创刊30周年庆
·
· 2012年第4期目录
· 2012年第3期目录
·
·
Links More
·   www.ccs.ac.cn
·   www.tju.edu.cn
 
Copyright ©2020 Chemical Industry and Engineering, all rights reserved.
Tianjin University 50A305, No.135 Yaguan Road, Haihe Education Park, Tianjin 300350, China
Tel: 86-22-27406054; E-mail: hgbjb@tju.edu.cn
Support by Beijing Magtech Co.Ltd, E-mail: support@magtech.com.cn