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Zhao W.,Zhejiang Research Institute of Chemical Industry Ltd.
Asian Journal of Chemistry | Year: 2014

Electrochemical reductive dehalogenation reactions of ortho-halogenated phenols, namely, o-iodophenol (OIP), o-bromphenol (OBP) and o-chlorophenol (OCP) on Ag electrode in alkaline medium have been studied by in situ FTIR combined with cyclic voltammetry and computational calculations. The Ag electrode showed a high electrochemical activity for dehalogenation reactions of OBP and OIP in contrast with OCP under the similar conditions and the dehalogenation potential of OIP was more positive than OBP, reflecting more facile reduction of OIP on Ag electrode. On the basis of in situ FTIR of OCP on Ag electrode, it was not obvious and the electrochemical reduction reaction was quite weak. Therefore, the order of electrochemical reductive dehalogenation was OIP > OBP > OCP.


Lu S.,East China University of Science and Technology | Zhuang Y.,East China University of Science and Technology | Wu N.,East China University of Science and Technology | Feng Y.,East China University of Science and Technology | And 5 more authors.
Journal of Agricultural and Food Chemistry | Year: 2013

The neonicotinoids with a nitroconjugated system had excellent bioactivity, which could rival imidacloprid, and has been previously reported. However, the photodegradation and hydrolysis of this series of neonicotinoids was very quick according to our further investigation, which cannot be developed as a pesticide further. The approach to further enhance the conjugation was tried not only to increase the bioactivities but also to improve the stability in water and in the sun. A substituted phenyl group was introduced into the furan ring of compound 3. A total of 13 novel neonicotinoid analogues with a higher conjugation system were designed and synthesized. The target molecular structures have been confirmed on the basis of satisfactory analytical and spectral data. All compounds presented significant insecticidal activities on cowpea aphid (Aphis craccivora), cotton aphid (Aphis gossypii), and brown planthopper (Nilaparvata lugens). The stability test exhibited that the stability of novel analogues in water and under the mercury lamp has been improved significantly in comparison to compound 3. © 2013 American Chemical Society.


Zhou X.-F.,Xi'an Jiaotong University | Zhao X.-M.,Xi'an Jiaotong University | Guo Z.-K.,Zhejiang Research Institute of Chemical Industry. Ltd. | Liu Z.-G.,Xi'an Jiaotong University
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2012

A program was developed to calculate volumetric adiabatic exponent and temperature adiabatic exponent based on P-R equation. This program was used to calculate adiabatic exponent of HFC-161, HC-290 and HC-600a, graph lines which describe the relationships between volumetric adiabatic exponent, temperature adiabatic exponent and reduced pressure, reduced temperature were drawn. After comparison and analysis, both adiabatic exponents of HC-600a were smaller, thus it is more suitable for alternative refrigerant under the same import and export condition of compressor.


Yao C.-Q.,Xi'an Jiaotong University | Zhao X.-M.,Xi'an Jiaotong University | Guo Z.-K.,Zhejiang Research Institute of Chemical Industry LTD
Kung Cheng Je Wu Li Hsueh Pao/Journal of Engineering Thermophysics | Year: 2014

According to the transient hot wire method, a new apparatus was designed for measurement of thermal conductivity. The experiment system was tested with the standard matter nitrogen. And it indicated that the results measured by the new apparatus were accurate and reliable. The thermal conductivity of gaseous HFC161 was measured over the temperature range from 253 K to 373 K and at pressure from 139.9 kPa to 4470.3 kPa. The results were fitted by a polynomial as a function of temperature and pressure for future research.


Li M.-C.,Zhejiang University of Technology | Yi J.-M.,Zhejiang University of Technology | Lu J.-J.,Zhejiang University of Technology | Li J.,Zhejiang University of Technology | Zhao W.-J.,Zhejiang Research Institute of Chemical Industry Ltd.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2014

Micro-FTIR mapping technology was used to monitor the amount and distribution of Mg(OH)2 on the anodic coating of magnesium alloy which was immersed in the 7.3 Wt% Na2SO4 solution for different time. In the solution, part of the MgO on the surface of the Mg alloy could gradually transform into Mg(OH)2 which could be detached from the Mg alloy surface and dissolved into the solution. With immersion time of 2 h in 7.3 Wt% Na2SO4 solution 2h, FTIR mapping results showed that FTIR absorption signal of Mg(OH)2 was strongest and Mg(OH)2 was most on the surface of the anodic coating. After 4 hours, the content of Mg(OH)2 began to decrease, and the Mg alloy was etched gradually. The FTIR mapping results of another component Al2O3 with immersion time were almost similar to those of Mg(OH)2. The impedance of the oxide film was also analyzed using electrochemical impedance spectroscopy. It showed that the impedance changed with the immersion time and conformed to the corrosion law of the oxide coating. This research has a good guidance and application value for characterization of the anodic coating on magnesium alloy.


Chen H.,Zhejiang Research Institute of Chemical Industry LTD | Yu S.,CAS Institute of Electrical Engineering | Zhu G.,Zhejiang Research Institute of Chemical Industry LTD | Xu W.,Zhejiang Research Institute of Chemical Industry LTD
2014 17th International Conference on Electrical Machines and Systems, ICEMS 2014 | Year: 2015

As a frontier cooling technology in the electric machine field, the evaporative cooling technology has significant advantages in cooling performance, insulativity, maintainability, and reliability. These advantages make the evaporative cooling technology fulfill the requirements of cooling system in hydro, turbo, and wind power generators. However, a suitable evaporative cooling medium is hard to obtain. This paper proposes the standards of choosing the cooling medium for the evaporative cooling system. © 2014 IEEE.


Su C.,Cooperation Technology | Yang F.,Cooperation Technology | Ye Y.,Cooperation Technology | Xu L.,Zhejiang Research Institute of Chemical Industry LTD. | And 2 more authors.
Journal of the Electrochemical Society | Year: 2013

In this work, two poly[tris(thienylphenyl)amine] derivatives, poly[tris(4-(2-thienyl)phenyl)amine] (PPT1N) and poly[4,4,4- tris(bithienylphenyl)amine] (PPT2N) are successfully synthesized. And the chemical structure and electrochemical performance of the prepared materials are characterized by 1H NMR, UV-vis, FT-IR spectra and galvanostatic charge-discharge testing by simulated lithium ion half-cell method. The results show that the introduction of thiophene units as both electrochemically redox active moieties and "bridge" linkage into polytriphenylamine benefits the charge carrier transportation along molecular chain and optimizes the particle morphology of the resulting polymers. As a result, the obtained polymers, as cathode materials for lithium ion batteries exhibit improved specific capacity, cycling stability and rate capability, compared to that of polytriphenylamine-based cathode. Especially, the PPT1N-based electrode demonstrates a higher specific capacity of 129.3 mAh g-1 and retains over 83% of the initial capacity with a 10 times increase in the current from 50 to 500 mA g-1. These enhanced electrochemical performances are partly attributed to the introduction of electrochemically redox active thiophene units, the improved charge carrier transportation and the improved spherical micro-morphology. © 2013 The Electrochemical Society.


Yao C.,Xi'an Jiaotong University | Zhao X.,Xi'an Jiaotong University | Lv S.,Xi'an Jiaotong University | Guo Z.,Zhejiang Research Institute of Chemical Industry LTD.
Fluid Phase Equilibria | Year: 2014

The thermal conductivity of ethyl fluoride (HFC161) was measured in both the saturated liquid and the gaseous phase by the transient hot wire method. Measurements of the thermal conductivity of the saturated liquid HFC161 were reported over the temperature range from 233. K to 373. K and in gaseous phase from 233. K to 373. K along 15 quasi-isotherms and at pressure up to 4470. kPa. The total uncertainty of the gaseous experiment data was less than ±3% and that of liquid experimental results would be better than ±2%. The results of liquid phase were correlated as a function of temperature and the gaseous phase results were correlated as a function of temperature and pressure for the purpose of interpolation. The absolute mean deviation and maximum deviation of the liquid results from those calculated by polynomial were 0.53% and -1.84%, respectively. The maximum deviation and the absolute mean deviation of the gaseous results from the correlation were 2.94% and 1.18%, respectively. © 2014 Elsevier B.V.


Lv S.,Xi'an Jiaotong University | Zhao X.,Xi'an Jiaotong University | Yao C.,Xi'an Jiaotong University | Wang W.,Xi'an Jiaotong University | Guo Z.,Zhejiang Research Institute of chemical Industry Ltd.
Fluid Phase Equilibria | Year: 2014

The paper describes an improved Maxwell type oscillating-disk viscometer. The experimental system was calibrated by argon, carbon dioxide, nitrogen, hydrogen and verified by nitrogen. The viscosities of gaseous HFC-161 were measured from 293. K to 369. K at pressures from 0.1. MPa up to the saturated vapor pressure. An empirical viscosity equation is proposed to interpolate the present experimental data as a function of density and temperature. The uncertainty of the reported viscosity was estimated to be within 1%. © 2014 Elsevier B.V.


Ma J.,Zhejiang University of Technology | Hu Z.,Zhejiang University of Technology | Li M.,Zhejiang University of Technology | Zhao W.,Zhejiang Research Institute of Chemical Industry Ltd. | And 6 more authors.
Tetrahedron | Year: 2015

An efficient 2,3-dichloro-5,6-dicyano-1,4-benzoquinone/tert-butyl nitrite-catalyzed aerobic oxidation of diarylmethane sp3 C-H bonds in the presence of acetic acid has been developed. Under the optimal reaction conditions, a number of diarylmethanes can be directly converted to their corresponding diarylketones in good to excellent yields. In addition, a plausible reaction mechanism has been investigated. © 2015 Elsevier Ltd. All rights reserved.

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