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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.

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.

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.

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.

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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