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Luo C.,Zhejiang University | Qian C.,Zhejiang University | Luo H.,CAS Shanghai Advanced Research Institute | Feng L.,Zhejiang Jianye Chemical Co. | And 2 more authors.
Asia-Pacific Journal of Chemical Engineering | Year: 2014

The performance of the CuO-NiO/γ-Al2O3 catalyst used in the synthesis of N-alkylmorpholines from diethylene glycol, alcohol, and ammonia was studied. The catalyst was prepared with Ni and Cu as the active components, and the optimum contents were 4.2-4.4% and 16.8-18.9%, respectively. The catalytic activity decreased rapidly as the catalyst deactivated gradually under the high temperature and liquid hourly space velocity reaction condition. The fresh and deactivated catalysts were characterized by inductively coupled plasma atomic emission spectrometry, scanning electron microscope, X-ray diffraction, thermo gravimetric analyzer, element analysis instrument and N 2 adsorption-desorption. It was found that the catalyst was covered with carbon deposition, which stunted the active center of catalyst surface and blocked the channels of the support. In addition, the sintering of the copper crystallites resulted in reunion of active metal and reduction of the active sites. At last, the catalysts were regenerated by calcination with high temperature, and the yield of the regeneration catalytic reaction was restored to 88.9% of its original levels. Copyright © 2013 Curtin University of Technology and John Wiley & Sons, Ltd. © 2013 Curtin University of Technology and John Wiley & Sons, Ltd.


Liu J.-Q.,Luoyang Normal University | Li Y.-Y.,Luoyang Normal University | Wang A.-Y.,Zhejiang Jianye Chemical Co. | Hong D.-F.,Luoyang Normal University | And 4 more authors.
Journal of Chemical and Engineering Data | Year: 2014

The solid-liquid equilibria of 4-amino-3,6-dichloropyridazine (ADCP) in seven pure organic solvents including methanol, acetone, ethanol, dichloromethane, ethyl acetate, 1,4-dioxane, and tetrahydrofuran were determined with the synthetic method from (278.15 to 333.15) K at atmospheric pressure using a laser monitoring observation technique. The measured solubility data increased with the rise of temperature. These solubility data were correlated with two models: the modified Apelblat and λh (Buchowski) equation. The relative deviation of the modified Apelblat equation was no more than 2.1 %, while that of λh equation was less than 4.5 %. Better correlation results were obtained in most solvents with modified Apelblat equation. Furthermore, using van't Hoff plot, the calculation was performed to obtain the apparent dissolution enthalpy and entropy of the solution of ADCP in these solvents, based on which the apparent dissolution Gibbs free energy change was deduced. (Graph Presented). © 2014 American Chemical Society.


Liu J.-Q.,Luoyang Normal University | Wang Y.,Luoyang Normal University | Tang H.,Luoyang Normal University | Wu S.,Luoyang Normal University | And 4 more authors.
Journal of Chemical and Engineering Data | Year: 2014

The solubility of aceclofenac in six pure solvents from (293.35 to 338.25) K was experimentally measured using a synthetic method. The experimental results indicate obviously that the solubility of aceclofenac in the selected solvents increases with elevated temperature. Furthermore, the experimental solubility data were fitted with modified Apelblat and Wilson models. The results show that the data calculated by the two models agree with the measured data with RMSD values of no more than 2.75 %. © 2014 American Chemical Society.


Wu Z.-J.,Zhejiang University | Qian J.,Zhejiang Jianye Chemical Co. | Wang T.-T.,Zhejiang University | Huang Z.-Z.,Zhejiang University | Huang Z.-Z.,Nankai University
Synlett | Year: 2014

An unprecedented DCC reaction between chromene and aldehydes catalyzed by proline has been developed via direct C-H functionalization. A plausible mechanism using DDQ to activate α-C-H of chromene and proline to activate aldehyde is also proposed. © Georg Thieme Verlag Stuttgart New York.


Wu S.,Hangzhou Dianzi University | Cui Y.-C.,Zhejiang Jianye Chemical Co. | Zhang R.-D.,Hangzhou Dianzi University
Chinese Control Conference, CCC | Year: 2014

The issue of cutoff error in conventional dynamic matrix control algorithm (DMC) can be solved by modifying the shifting matrix when applied to integrating processes, but the system will reach a different steady state if the process encounters a continuous and constant disturbance. Based on the modified shifting matrix, a novel error correction method is introduced to compensate for the process state, which will be regulated gradually and recovered to its steady set-point finally. Simulation results show that the proposed algorithm can guarantee good tracking performance and disturbance rejection simultaneously. © 2014 TCCT, CAA.


Su J.,Zhejiang University | Li X.,Zhejiang University | Chen Y.,Zhejiang Jianye Chemical Co. | Cui Y.,Zhejiang Jianye Chemical Co. | And 3 more authors.
RSC Advances | Year: 2016

N-Methyl amines play a major role in the production of medicines, pesticides, surfactants and dyes. N-Methylation of primary or second amines with methanol is considered to be a green path for the synthesis of N-methyl amines and the catalyst is key. In this article, the combined Al2O3-mordenite catalyst (mass fraction of alumina is 40%) with good activity, selectivity, lifetime and stability was prepared for N-methylation of various amines with methanol in a hydrogen free system in a fixed bed reactor, and characterized by XRD, N2 adsorption and NH3-TPD. Furthermore, the methanol adsorption was investigated by in situ FTIR, and the result indicated that methoxyl species may be the active species for the N-methylation of amines. © 2016 The Royal Society of Chemistry.


Li Y.-Q.,Zhejiang University | Chen Y.-B.,Zhejiang Jianye Chemical Co. | Huang Z.-Z.,Zhejiang University | Huang Z.-Z.,Nankai University
Chinese Chemical Letters | Year: 2014

A substitution reaction of amines with alcohols for N-alkylated amines has been developed using inexpensive AlCl3 without any ligand or additive. Either aromatic or aliphatic amines and primary or secondary alcohols perform the AlCl3-mediated reaction smoothly to afford various N-alkylated amines in satisfactory yields. © 2014 Zhi-Zhen Huang. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.


Zhong J.-S.,Zhejiang Jianye Chemical Co. | Tang Z.-Y.,Zhejiang Jianye Chemical Co. | Yu W.-F.,Zhejiang Jianye Chemical Co.
Xiandai Huagong/Modern Chemical Industry | Year: 2012

The basic characteristics of GC analysis sec-butylamine product synthesized from sec-butylalcohol by cobalt-catalytic ammoniation under the condition of hydrogen are studied. The analytical methods for sec-butylamine using new-type mixed quartz capillary columns in industrial production are discussed. The results indicate that sec-butylamine has good separation degree and linear correlation on new-tape mixed quartz capillary columns. The relative standard deviation is in the range of 0.2% with good repeatability. The method can be operated rapidly and fulfilled within 7 minutes with quick speed and strong practical applicability.


Huang J.-M.,Zhejiang University | Qian C.,Zhejiang University | Feng L.,Zhejiang Jianye Chemical Co. | Chen Y.-B.,Zhejiang Jianye Chemical Co. | Chen X.-Z.,Zhejiang University
Monatshefte fur Chemie | Year: 2013

The amination of aliphatic alcohols in the gas-solid phase was investigated in a fixed-bed reactor in the presence of CuO-NiO/γ-Al2O 3 as the catalyst. This catalytic system was successfully applied for both the N-methylation of aliphatic amines and N-alkylation of piperidine with primary or secondary alcohols. N-Alkylation of piperidine with low-carbon alcohols resulted in high conversions and selectivities, and the conversion of piperidine and the selectivities toward the desired products declined gradually with the increase of the carbon number of aliphatic alcohols. The influence of varied conditions on the N-cyclohexylation of piperidine was also evaluated, including liquid hourly space velocity (LHSV), temperature and the catalyst; especially the catalyst had the greatest impact. Finally, the test of the catalyst's stability was performed. © 2013 Springer-Verlag Wien.


Luo C.,Zhejiang University | Luo H.,Zhejiang University | Qian C.,Zhejiang University | Chen Y.,Zhejiang Jianye Chemical Co. | And 2 more authors.
Research on Chemical Intermediates | Year: 2013

In situ diffuse reflectance Fourier-transform infrared spectroscopy was used to perform mechanistic investigation on the synthesis of N-alkylmorpholines from diethylene glycol (DEG), alcohol and ammonia. The results showed that the synthesis of N-alkylmorpholines on a heterogeneous catalyst proceeded along the reaction path between DEG and alkylamine when choosing CuO-NiO/γ-Al 2O3 as a suitable catalyst. In addition, the yield of methylmorpholine and ethylmorpholine was 86.4 and 76.6 %, respectively. © 2012 Springer Science+Business Media B.V.

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