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Current Issue
2012 Vol.29 Issue.01,
Published 2012-01-15
Article
Article
1
Synthesis of Cyclic Carbonate from CO
2
and Epoxide Catalyzed by Phosphonium Halides ILZinc Halide
YAO Rui, WANG Hua, HAN Jin-Yu, RONG Mei-Zhu, NIU Yu-Fei
An efficient Lewis acid/base catalyst composed of zinc chloride and trihexyl(tetradecyl)phosphonium bromide ionic liquid was developed and showed surprisingly high activities for the coupling reaction of CO
2
and epoxides.The effects of reaction temperature，CO
2
pressure，time and various compositions of the catalyst have been investigated systematically.A high PC yield（95%）could be reached at 100 ℃ with a low CO
2
pressure(2 MPa)for 15 min in the presence of [(C
6
H
13
)3P(C
14
H
29
)]Br/ZnCl
2
(molar ratio is 2∶1).The catalyst was also applicable to the coupling reaction of CO
2
and other epoxides.At the end，a possible reaction mechanism of the catalyst was proposed.
2012 Vol. 29 (01): 1-6 [
Abstract
] (
2435
) [
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1KB] [
PDF
384KB] (
4138
)
7
Synthesis and Performance of LiCo
1/3
Mn
1/3
Ni
1/3
O
2
Cathode Material for Lithiumion Battery
LIU Huan, LI Yong-Mei, YAO Yao-Chun, WEI Qin-Shuai, DAI Yong-Nian, FAN Yan-Min
The LiCo
1/3
Mn
1/3
Ni
1/3
O
2
cathode materials for lithiumion batteries were synthesized by mechanical activationhigh temperature solidstate method.The effect of reaction conditions（
n
(Li）/
n
(M）and ball milling effects）on the structure of the products was investigated.The products were analyzed by Xray diffraction spectroscopy（XRD），scanning electron microscopy（SEM）and electrochemical tests.Under optimum condition the materials LiCo
1/3
Mn
1/3
Ni
1/3
O
2
cathode had good cyclic performance.The initial discharge capacity was 160 mA·h/g at a current density of 20 mA/g between 2.7—4.5 V and the discharge capacity retention was 9698% after 30 cycles.
2012 Vol. 29 (01): 7-11 [
Abstract
] (
4044
) [
HTML
1KB] [
PDF
451KB] (
3085
)
12
Hydrogenation Refined Process of Ethylene C9
LI Da-Wei, CAO Zu-Bin
The ethylene cracking C9 from Shanghai Jinshan Petrochemical was used as raw material.Twostage hydrogenation process was carried out in a microreactor.The results showed that colorless transparent solvent oil or gasoline blending stock of highoctane value could be obtained by hydrogenation of cracking C9.Through bromine value of hydrogenation product，the effect of processing conditions on the hydrogenation was investigated.The optimal conditions of hydrogenation were as follows：for first period,reaction temperature 70 ℃，reaction pressure 3.0 MPa，space velocity 2.0 h
-1
，volumatic ratio of hydrogen to oil 200∶1；for second period,reaction temperature 250 ℃，reaction pressure 3.0 MPa，space velocity 2.0 h
-1
，volumatic ration of hydrogen to oil 200∶1.
2012 Vol. 29 (01): 12-16 [
Abstract
] (
1880
) [
HTML
1KB] [
PDF
513KB] (
2869
)
17
Preparation of Cyclopentanol By Direct Hydration of Cyclopentene（Ⅱ）：Optimization of the Reaction
YANG Xiao-Hui, SONG Jian, WU Jie, FENG Rong-Xiu
The preparation of cyclopentanol by direct hydration of cyclopentene was studied with strong acidic cation Amberlyst36 as catalyst and 1-butanol as solvent.The influences of reaction temperature，reaction time，cocatalyst type，the molar ratio of H
2
O to cyclopentene and dosage of catalyst were studied.The optimum reaction conditions were obtained：molar ratio of H
2
O to cyclopentene was 1∶4，dosage of catalyst was 9% of the total mass，reaction temperature 150 ℃，reaction time 2 h，the conversion of cyclopentene was 12.42%，and the selectivity to cyclopentanol was 95.78%.And in this condition the stability of the catalyst was investigated.The results showed that the catalyst was stable.
2012 Vol. 29 (01): 17-20 [
Abstract
] (
1612
) [
HTML
1KB] [
PDF
361KB] (
2930
)
21
Synthesis Technology for Bistriphenylsilyl Chromate
WANG Jun, LI Yun, LI Cui-Qin
Bistriphenylsilyl chromate was prepared from triphenyl chlorosilane and potassium dichromate.The effect of solvent on the reaction was studied and found glacial acetic acid as solvent could promote substitution reaction of S
N
1-Si.Binary solvent was chosen to improve the postprocessing method and the product purity，and to reduce pollution to environment.The optimized conditions for synthesizing were as follows：the reaction temperature was 30 ℃，the reaction time was 2 h，the molar ratio of triphenyl chlorosilane to potassium dichromate was 2.0∶1.2，the volume ratio of glacial acetic acid to cyclohexane was 2∶1.Under the optimal condition，the yield of star antioxidant was above 79% and the melting point was 155—156 ℃.The structure was characterized by elemental analysis，DSC and IR.
2012 Vol. 29 (01): 21-25 [
Abstract
] (
1841
) [
HTML
1KB] [
PDF
429KB] (
2746
)
26
Synthesis and Properties of Novel Sulfobetaine
DING Wei, LI Shu-Jie, YU Tao, QU Guang-Miao, YUAN Dan-Dan, LIU Kun, CHEN Yu-Ping, ZHANG Zhi-Wei
N，N-dimethyl-N-(2-hydroxy-3-o-nonyl phenoxy）propane ammonium（2 -hydroxy） propyl sulfobetaine was synthesized by 2-hydyoxy-3-chloro propanesulfate，dimethylamine，nonylphenol and epichlorohydrin as raw materials.The optimal synthesizing conditions of nonylphenol epoxy propyl ether were determined by orthogonal experiment.The structure of the end product was characterized by infrared spectroscopy，and the surface tension and critical micelle concentration（cmc）of zwitterionic surfactant were also determined by dropping volume method.The values of cmc and surface tension at cmc(
γ
cmc
）of the surfactant 9.12×10
-4
mol/L and 27.87 mN/m,respectivelyThe emulsifying performance of the surfactant was also investigated at 45 ℃
2012 Vol. 29 (01): 26-29 [
Abstract
] (
1660
) [
HTML
1KB] [
PDF
322KB] (
3415
)
30
Synthesis of Polypropylene Nucleation Agent DMDBS
DUAN Yuan-Chao, SONG Jian, PANG Xiao-Min, SUN Shu-Juan, FENG Rong-Xiu
The nucleation agent DMDBS was synthesized by aqueous precipitation and the optimization of the process was studied.Sorbitol and 3,4-dimethylbenzaldehyde were condensed in aqueous H
2
SO
4
in presence of the emulsifier OP-10.Factors such as the sulfuric acid concentration，molar ratio of aldehyde to alcohol,reaction temperature and reaction time，were investigated；and the preferred preparation conditions were reaction temperature 15 ℃，reaction time 10 h，the sulfuric acid concentration 45%，molar ratio of aldehyde to alcohol 1.5∶1.0.The crude product was refined with N,N-dimethyl-n-octadecylamine and acetone.Under this condition，the DMDBS was obtained with the yield of 75.56%，purity above 99%，melting point of 252—253 ℃，giving the product with quality of a high level.
2012 Vol. 29 (01): 30-33 [
Abstract
] (
2187
) [
HTML
1KB] [
PDF
195KB] (
3201
)
34
Technique and Kinetics for the Optimal Extraction of Siberian Cocklour Fruit Oil
RU Shao-Gang, ZHAO Wen-Ying, ZHU Qing-Shu, WANG Liu-Hua
The refluxing extracting process of Siberian Cocklour Fruit oil and its kinetics were investigated.The effects of main parameters（extraction temperature，particles size，extraction temperature，extraction time，etc.）on the recovery of oil were studied and the optimal extraction technology was obtained，and then the extracting kinetics was studied.The optimal refluxing extraction conditions were as follows：alcohol was selected as solvent，the ratio of alcohol to raw material was 9∶1，refluxing 6.5 h at 80 ℃，and raw material size was 60 meshes.The study of kinetics showed that the material size had an important influence on extraction efficiency of oil，and the kinetic model was accord with secondorder.The result can be used to optimize and control the process of extraction of Siberian Cocklour Fruit oil.
2012 Vol. 29 (01): 34-38 [
Abstract
] (
1913
) [
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1KB] [
PDF
367KB] (
2672
)
39
Prediction Model for Aromatization Reacting System of LPG Based on BackPropagation Neural Network
LI Xiao-Hui, ZHU Jian-Hua, WU Ben-Cheng, HAO Dai-Jun
In this paper，backpropagation neural network was applied to the system of LPG aromatizationThe neural network model of this reacting system was established under given reacting conditions.The networks training results have achieved present requirements and the network output could match the experimental data well.This model could predict products distribution of the LPG aromatization system under given conditions.The results could provide some reference for further development on LPG aromatization，prediction of product distribution and simulation of the industrial processes.
2012 Vol. 29 (01): 39-42 [
Abstract
] (
2132
) [
HTML
1KB] [
PDF
529KB] (
2717
)
43
Simulation and Distribution Performance Analysis of Annular Distributor in Multitubular FixedBed Reactor
BAI Lu, ZHANG Min-Hua, GENG Zhong-Feng
Annular distributor plays an important role in achieving uniform distribution in the shell of multitubular fixedbed reactor.The static pressure distribution characteristics and the influence of the structure parameters of annular distributor such as inlet number and outlet number on the uniform performance were analyzed based on the calculated fluid dynamic（CFD）method.The simulation results showed that when outlets of the same size were opened，and other structure parameters and import condition kept unchanged，decreasing outlet number in a certain range and increasing inlet number were beneficial to uniform distribution of fluid inside the annular distributor.Moreover，according to the pressure characteristics in annular distributor，the fluid distribution depends on the pressure drop of main channel and the pressure drop of outlets.Based on simulation results,
U
was defined as the ratio of the pressure drop of outlets to the total pressure drop between inlet and outlet.If
U
was at 0.95—1.06，that means the fluid has been uniformly distributed even outlets of the same size were opened.
2012 Vol. 29 (01): 43-47 [
Abstract
] (
3239
) [
HTML
1KB] [
PDF
381KB] (
3325
)
48
RP-HPLC Determination of Glycolicacid in Presence of Methyl Glycolate
HUANG Guang-Xiao, XU Yan, ZHAO Yu-Jun, MA Xin-Bin
A method for quantification of methyl glycolate and the hydrolysis product glycolic acid using high performance liquid chromatography was developed.The apparatus type was an HP1100 series high performance liquid chromatography with VWD.Separation was performed on a ZORBAX SBC18 column（4.6 mm×150 mm，5 μm）The column temperature was 25 ℃ and the mobile phase was acetonitrile and phosphoric acid aqueous solution（20∶80，V/V）The flow rate was 0.4 mL/min with ultraviolet detection wavelength at 214 nm.A good linear regression curve was obtained with a favorable correlation coefficient（greater than 0.999 6）.The method showed high average recoveries for the samples ranged from 99.30% to 105.96% and good precision（RSD）ranged from 0.3% to 1.0%.The results showed that the method was simple，fast and accurate enough to apply to the hydrolysis system of methyl glycolate.
2012 Vol. 29 (01): 48-51 [
Abstract
] (
1728
) [
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1KB] [
PDF
213KB] (
3496
)
52
Development and Application of Purifying Device of Surplus Ammonia Water
CHEN De-Yun
The adoption of boardscraping coal tar remover setup for purifying the surplus ammonia water produced during the coking which uses the 4.3 m and 5.3 m stampcharging coke oven has many problems, such as the tar content is high after purification, the flow rate fluctuates, and the pH value is unstable. Therefore the requirements of water purifying process cannot be met. Based on the technological retrofit, through adding a tarammonia water sedimentation separator and automatic control equipment in the purification process of surplus ammonia water, the difficult problems mentioned above can be resolved successfully.
2012 Vol. 29 (01): 52-56 [
Abstract
] (
1598
) [
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1KB] [
PDF
535KB] (
2749
)
57
Review of Waste Heat Utilization Technologies for Industry Processes
FENG Hui-Sheng, XU Fei-Fei, LIU Ye-Feng, DAN Chun
This paper reviewed the characteristics and applications of waste heat recovery technologies such as heat transfer utilization. refrigeration and heat pump. power generation by organic Rankine cycle (ORC) system and Kalina cycle. The thermodynamic principle and research method existing in the recovery of waste heats were carried out. The dissemination of ORC system and Kalina cycle system are necessary for increasing the effective of waste heat utilization. Meanwhile. refrigeration and heat pump technologies should be combined with specific industry process， application of simulation to the design also should be enhanced.
2012 Vol. 29 (01): 57-64 [
Abstract
] (
2127
) [
HTML
1KB] [
PDF
427KB] (
4572
)
65
Development of Sulfate Removal and Preparation Method of Zr(IV) Composite
MENG Fan-Zhong, MA Hong-Qin
In chloralkali industry, sulfate is one of the common impurities and has lots of hazards. This paper summarized the development of sulfate removal, pointed out the advantages and disadvantages of all kinds of removal methods and considered that the new removal method equiped with Zr(IV) composites could overcome the defects of the present methods after the successful preparation of new materials. The influence factors in the preparation process were analyzed and idea to prepare Zr(IV) composites was proposed.
2012 Vol. 29 (01): 65-72 [
Abstract
] (
2512
) [
HTML
1KB] [
PDF
740KB] (
3058
)
73
Progress in Production of Biodiesel with Supercritical Fluid Technology
FU Cun-Ting, LIU Cheng, ZHANG Min-Hua
The latest research progress in supercritical fluid technology for biodiesel production was reviewed. The reaction mechanism and kinetics, and the influence of operation conditions, water and free fatty acids in raw materials, cosolvents and additional catalysts on transesterification reaction were introduced. The advantages, disadvantages, and developing tendency of supercritical fluid technology for biodiesel production were also advanced.
2012 Vol. 29 (01): 73-78 [
Abstract
] (
1919
) [
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1KB] [
PDF
268KB] (
3159
)
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