The Chinese Journal of Process Engineering

Experimental Study on Choking Phenomenon of Gas-Powder Flow

WANG Xiao-ming;LI Qiang;ZOU Zong-shu;SHEN Feng-man

. 2005, 5(6): 591-596.

Asbtract ( )

PDF (418KB) ( )

Related Articles | Metrics

Based on the theory of two-phase homogeneous equilibrium model (HEM), the choking phenomena of gas-powder flow were experimentally studied and theoretically analyzed. Experiments were conducted in a horizontal constant cross-section duct with three kinds of powder: Al2O3, hollow Al2O3 and Al, with different densities, specific heat capacities and thermal conductivities, in order to understand the relationship between the mass flow-rate and the inlet stagnant pressure. Applying the choking principle, the apparent critical pressure ratio and apparent sonic velocity (ASV) of gas-powder flow were determined. Considering the thermal relaxation of the two-phase flow, the effective specific heat capacity (ESHC) of solid phase, the effective isoentropic exponent (EIE) of the mixture and the relative effective specific heat capacity (RESHC) were defined. The experimental results show that, with the increase of the stagnation pressure, the mass flow rate increases as a cubic polynomial function before choking and linearly after choking. The influence of the physical properties of powders on ASV of gas-powder flow is obtained by the comparison between experimental results of different powders. When solid mass loading (SML) is small, ASV is mainly affected by the thermal conductivity of the powder. When SML is large, the density of the powder affects ASV instead. ESHC of the solid phase decreases with the increase of its loading. The thermal conductivity is the main factor to affect ESHC, while density is hardly so. ESHC of the solid phase is very small (<0.5%), and may be ignored. Therefore, the isoentropic exponent of the gas phase can be used as that of the mixture to calculate the ASV of gas-particle flow.

Experiment and Numerical Simulation on Slug Fluidization of Geldart D Particles

YANG Fu-jun;WANG Jia-jun;GU Xue-ping;FENG Lian-fang

. 2005, 5(6): 597-600.

Asbtract ( )

PDF (400KB) ( )

Related Articles | Metrics

The fluidization of mono-diameter Geldart D particles was experimentally studied and numerically simulated with the two-fluid model based on the granular kinetic theory. The simulation results of voidage distribution show the clear characterization of slug fluidization. The predictions of bed expansion ratio and power spectrum density of pressure fluctuation calculated using FFT method are in agreement with those from experiments. Analysis on Froude number and particle kinetic energy is also carried out. The pseudo-periodicity of Froude number and particle kinetic energy against time reflects exactly the gas-solid heterogeneous flow structure and motion of large gas bubbles in slug fluidized bed.

Optimization of Dual-impeller Configuration of Gas-Liquid Surface Aerator

LI Xiang-yang;YU Geng-zhi;MAO Zai-sha

. 2005, 5(6): 601-604.

Asbtract ( )

PDF (438KB) ( )

Related Articles | Metrics

In view of the limitation to a gas-liquid surface aerator with single-impeller configurations that the aerated gas bubbles are concentrated in the upper region of the reactor, five dual-impeller configurations are tested with respect to specific power consumption, gas-liquid volumetric mass transfer and mixing time. It is found that the defects of single-impeller configurations are alleviated and the dual-impeller configuration consisting of upper Rushton impeller for surface aeration and lower upward-pumping axial impeller is the best configuration. Such configurations are in accordance with the principle of flow field coupling and enhancing.

Thermodynamic Analysis of Lipase-catalysed Esterification in Binary Organic Solvent Mixtures

WAGN Le-le;BAI Shu;SUN Yan

. 2005, 5(6): 605-608.

Asbtract ( )

PDF (301KB) ( )

Related Articles | Metrics

Two kinds of miscible organic solvents with marked discrepancy in polarity, 1,4-dioxane and heptane, were mixed at different mole proportions to create a series of binary solvent mixtures with different logP values. Lipozyme RM IM-catalysed esterification between 1-butanol and lauric acid in such binary solvent mixtures as well as singular solvents with corresponding polarities was comparatively investigated. The variation of enzyme activity calibrated by initial rate of esterification with the decrease of solvent polarity in solvent mixtures and singular solvent was compared, and different variation tendencies were observed. Based on the results in the effect of the solvent mixture on the thermodynamic activities of reactants, the activation energies of reactions were proposed to rationally explain the phenomena observed in the esterification.

Kinetics of Reduction of Sodium Chlorate with Pyrite to Produce Chlorine Dioxide

PENG Qing-jing;FU Wei-chang;CAI Shi-jian

. 2005, 5(6): 609-612.

Asbtract ( )

PDF (300KB) ( )

Related Articles | Metrics

The reduction kinetics of sodium chlorate with pyrite to produce chlorine dioxide was investigated. It was shown that selectivity of chlorate ion reduced to chlorine dioxide was over 99.7%. The reaction has been found in zero and first orders with respect to ClO3- and H+, respectively. The kinetic equation is rD=kCB, the apparent activation energy is 52.9 kJ/mol, and the reaction rate constant k=2.14x107exp(-6360/T) L/(m2.min), respectively.

Porous St/DVB Copolymer Microspheres for Immobilization of Lipase by Layer-by-Layer Selfassembly

SHANG Yuan-yan;ZHU Yi-hua;YANG Xiao-ling

. 2005, 5(6): 613-616.

Asbtract ( )

PDF (429KB) ( )

Related Articles | Metrics

Lipase layers, being separated by polyelectrolyte [poly(diallyldimethylammonium chloride)] with opposite electric charges each by each (PDADMAC), were deposited onto porous S/DVB copolymer microspheres with hydrophobic surface using layer-by-layer selfassembly. The optimal conditions for the selfassembly of single lipase layer were determined as pH 5.5, adsorption time 0.5 h, ratio of lipase to carriers 3:1 (mass ratio). Three lipase layers were assembled onto porous St/DVB copolymer microspheres based on the above optimal conditions. The experimental results showed that the activity of two lipase layers increased 24% comparing with that of single lipase layer and the activity of three lipase layers increased slightly comparing with that of two lipase layers when the outermost layer was lipase. In addition, under the pH of lipase solution of 7.5, the influence of ion strength of PDADMAC solution on the different layer of selfassembly of lipase was also investigated. The result showed that the activity of lipase decreased with the increase of layer number when the outermost layer was either lipase or PDADMAC.

Preparation of Gelatin Submicron Particles with Emulsion Method

CAI Meng-jun;ZHU Yi-hua;YANG Xiao-ling

. 2005, 5(6): 617-620.

Asbtract ( )

PDF (863KB) ( )

Related Articles | Metrics

Gelatin submicron particles were prepared by emulsion chemical cross-linking method using gelatin (type A) as core material and paraffine as oil phase. The morphology and particle size of gelatin submicron particles were observed by scanning electron microscopy (SEM). The effects of gelatin concentration, emulsion stirring speed, emulsion temperature, emulsifier and cross-linking agent on particle size distribution, were investigated. The results show that increasing gelatin concentration, enhancing emulsion and using mixed emulsifier can decrease the gelatin submicron particle diameter using glutaraldehyde as cross-linking agent. In addition, the gelatin submicron particles with an average particle size about 450 nm and an orbicular spheric morphology were produced by using a high emulsion stirring speed of 7000 r/min in the optimum procedure.

Coke Oven Gas Recycling in Coke Dry Quchening and Coke Desulfurization

HUANG Xiao-wen;GUO Zhan-cheng

. 2005, 5(6): 621-625.

Asbtract ( )

PDF (564KB) ( )

Related Articles | Metrics

The coke dry quchening process by using coke oven gas to replace nitrogen as circulating heat transfer medium was investigated experimentally. Coke cooling and desulfurization were realized in this process. The calculated results of mass and heat balance showed that the ratio of gas to coke was reduced remarkably when circulating coke oven gas replacing nitrogen, the circulating gas was reduced when the ratio of gas to coke in inlet gas was higher and the energy consumption of coke dry quchening setup was smaller. The results of coke hydrodesulfurizing experiments showed that the sulfur content of coke could be reduced markedly when coke oven gas was recycled in coke dry quenching.

Reduction Technology of Preparation of Ferronickel Powder from Nickel Concentrate

LIU Yan;ZHAI Yu-chun;ZHANG Ji-qian;YUAN Lei

. 2005, 5(6): 626-630.

Asbtract ( )

PDF (850KB) ( )

Related Articles | Metrics

Ferronickel powder was prepared by the processes of oxidation-reduction-magnetic separation. The content of Ni in raw nickel concentrate is 19.5%. Single factor experimental results show that the grade of Ni and Fe in magnetic products can be improved by increasing the reduction temperature and time, the grade of Ni and Fe is the highest when the average particle size of oxidized products is about 2.25 mm, while the grade of Ni and Fe decreases with increasing the flow rate of H2. The optimum technological conditions of reduction processes were obtained through orthogonal experiment L9(34): reduction temperature 900℃, reduction time 8 h，H2 flow rate 1.784 mL/s and average particle size of oxidation products 2.25 mm. The contents of Ni and Ni-Fe are 56.8% and 93.2% in ferronickel alloy powder prepared by this method, respectively. And the recovery rate of Ni is 87.0%.

Liquid-phase Oxidation of Cyclohexane to Cyclohexanone in a Bubble Column Reactor

GUO Zhi-wu;JIN Hai-bo;XIANG Zhi-jun;TONG Ze-min;CHENG Li-quan;HU Zhen-hua

. 2005, 5(6): 631-635.

Asbtract ( )

PDF (373KB) ( )

Related Articles | Metrics

Liquid-phase air oxidation of cyclohexane to cyclohexanone and cyclohexanol with cobalt napthenate as catalyst was carried out in a continuous bubble column reactor. The effects of reaction conditions including temperature, pressure, residence time of cyclohexane, superficial air velocity and catalyst concentration on cyclohexane conversion and the selectivities to cyclohexanone, cyclohexanol and cyclohexanyl hydroperoxide were studied. When the reaction was conducted in the system temperature range from 413 to 423 K, system pressure range from 1.2 to 1.5 MPa, superficial air velocity range from 2.5 to 3.5 cm/s and cyclohexane residence time of 30~40 min, the cyclohexane conversion of 5%~7% and the total selectivity to cyclohexanone, cyclohexanol and cyclohexanyl hydroperoxide of 80%~85% were obtained.

Biodecomposition of Low-grade Rock Phosphate with Some Bacteria and Fungi

CHI Ru-an;XIAO Chun-qiao;GAO Hong;WU Yuan-xin;LI Shi-rong;WANG Cun-wen

. 2005, 5(6): 636-639.

Asbtract ( )

PDF (338KB) ( )

Related Articles | Metrics

Decomposition of low-grade rock phosphate with three strains of Bacillus subtilis, Pseudomonas sp. and Aspergillus sp. was investigated. The experimental results show that the decomposition of rock phosphate is promoted in culture medium, and the highest rate of phosphorus leaching is 7%. The decomposition of rock phosphate with Aspergillus sp. is far better than that of Bacillus subtilis and Pseudomonas sp., confirming that the decomposition of rock phosphate with fungi is better than that with bacteria. The lower the content of rock phosphate, the higher the rate of phosphorus leaching. The rate of phosphorus leaching increases gradually with the culture time, but when cultured for more than 15 d, the leaching seems to be saturated. Moreover, the rate of phosphorus leaching reaches the highest value in Bacillus subtilis and Pseudomonas sp. culture media when the concentration of carbon source is 3%, but in Aspergillus sp. culture medium, the concentration of carbon source is 2%. Higher or lower than the suitable concentration restrains the phosphorus leaching.

Analysis of Reaction Process in Preparation of Chlorocyclohexaneby Direct Chlorination of Cyclohexane

XU Jun;QIAO Xu;CUI Mi-fen;TANG Ji-hai;ZHANG Jin-ping

. 2005, 5(6): 640-643.

Asbtract ( )

PDF (311KB) ( )

Related Articles | Metrics

The yield of chlorocyclohexane increased slowly with rising of reflux rate during the reactive distillation process of chlorocyclohexane preparation by photochlorination of cyclohexane. Thus, the existence of parallel reactions in this system was confirmed tentatively. The chlorinated liquid from the process for preparation of chlorocyclohexane by photochlorination of cyclohexane was analyzed by gas chromatography-mass spectrometry. The structures of 8 main products were determined. 3 parallel reactions were determined through the macroanalysis of reaction process. The consecutive-parallel reaction network mechanism was determined preliminarily. The present work may present a reference for research of reaction kinetics and optimization of preparation of chlorocyclohexane with reactive distillation process.

Synthesis of ZnCO3 via Solid State Reaction at Room Temperature and the Characteristics of Its Spontaneous Crystallization

WANG Jian-she;LIAO Sen;SONG Bao-ling;SUN Ya-bo

. 2005, 5(6): 644-647.

Asbtract ( )

PDF (453KB) ( )

Related Articles | Metrics

The nano-crystals of ZnCO3 were synthesized via solid state reaction at room temperature, when ZnSO4×7H2O reacted with NH4HCO3 containing PEG-400 as template, the average particle size of the crystals was about 25 nm. The experimental results showed that the crystals with ideal crystallization were obtained, while keeping NH4HCO3 excessive all the time to keep from impurity forming under optimal mixing of reactants. It was not necessary to let the reaction mixtures deposit for crystallization, for the product of zinc carbonate had spontaneously crystallized into ideal crystals within 20 min grinding time. On the contrary , the byproduct would form in long depositing time, resulting in formation of basic zinc carbonate. The template reagent played a key role for controlling composition of the product. The product was nano-crystals of zinc carbonate with the template, and leaving the rest mixture without the template, which contained basic zinc carbonate in majority and zinc carbonate. Comparing the product with that from microemulsion synthesis method reported in the literature, it was supposed that the controlling role of the template was played via forming microemulsion with water releasing from crystallized water in the reactants during the grinding process.

Influence of Aliphatic Polyols on the Products Reduced from Cu2+ at Different Hydrothermal Temperatures

CHEN Qin-chun;LIU Xiao-dong;DENG Hui-yu

. 2005, 5(6): 648-650.

Asbtract ( )

PDF (2199KB) ( )

Related Articles | Metrics

With CuSO4×5H2O and NaOH as main sources, three kinds of aliphatic polyols such as adonitol, xylitol and D-sorbitol as reductives, via XRD and SEM the reduction of Cu2+ was studied at different hydrothermal temperatures of 80, 150 and 180℃, respectively. The results show that all the products are Cu2O at 80℃ and their morphologies are different size octahedrons with addition of adonitol and xylitol, and octahedron at large sizes only with addition of D-sorbitol; at 150℃, the products are all Cu2O too, they are octahedrons and angle-free octahedrons with addition of adonitol and different size octahedrons with addition of xylitol and D-sorbitol; while the temperature is 180℃, the products are all Cu, and they are spheres consisting of small particles when adonitol added, not ordered particles with addition of xylitol, and octahedrons consisting of small particles when D-sorbitol added. It is concluded that the reductive ability order is adonitol>xylitol>D-sorbitol and the Cu forms after Cu2O.

Preparation of High Specific Surface Area Carbon Aerogels via CO2 Activation

HOU Jin-qiang;SHEN Jun;XUE Hui;WU Guang-ming;ZHOU Bin;NI Xin-yuan

. 2005, 5(6): 651-653.

Asbtract ( )

PDF (448KB) ( )

Related Articles | Metrics

Carbon aerogels were synthesized from sol-gel polymerization of resorcinol-formaldehyde and dried under ambient pressure and room temperature. The specific surface area of carbon aerogels after the CO2 activation would be three times larger than that of normal ones. The microstructures of carbon aerogels were investigated by scanning electron microscope (SEM) and specific surface area measurement, and the process parameters were optimized.

Evaluation on Eco-industrial System

ZHANG Da-wei;YANG Li;HU Shan-ying;CHEN Ding-jiang

. 2005, 5(6): 654-658.

Asbtract ( )

PDF (347KB) ( )

Related Articles | Metrics

On the basis of the principles of industrial ecology and according to the characteristics of eco-industrial system (EIS), a three factors model, economy-environment-structure, is presented to reflect development degree of an eco-industrial system. Based on the model, a series of evaluation indicators are proposed, such as eco-productivity index (EPI), exergy depletion index (yDP), environment index (EI), and couple degree (CD), etc. Through the integration of evaluation indicators, three composite indicators, economic development degree, environmental harmony degree and structure-coupled degree are obtained. In order to fully express the development characteristics, the conception of development difference is defined. The balance degree of system development can be studied by difference analysis. Finally, the proposed evaluation method is applied to valuate and analyze Lubei eco-industrial system at four different development stages. The result shows that these evaluation indicators can better reflect the degree of system development, which also can be used to guide the direction of system improvement.

Oxidation and Antioxidation of Hemoglobin in the Process of Membrane Separation

SHI Xiao-dong;LU Xiu-ling;ZHENG Chun-yang;YU Peng-zhan;SUO Xiao-yan;WANG Yong-quan;SU Zhi-guo

. 2005, 5(6): 659-664.

Asbtract ( )

PDF (363KB) ( )

Related Articles | Metrics

The effect of different antioxidation agents on the reduction of methemmoglobin (MetHb) was investigated. Five antioxidation agents, i.e. vitamin C (Vc), reduced glutathione (GSH), cysteine, n-acetul-cyateine and sodium sulfite were used and compared according to different changes of MetHb content. The experimental results showed that all the antioxidation agents could protect the bioactivity of Hb from oxidation, while Vc had strong ability to reduce MetHb. The optimal conditions [Vc/Hb=8 (mole ratio), pH=8] obtained were applied to the membrane filtration process following the ion-exchange chromatography step. Bioactivity of the hemoglobin was well maintained when Vc was added as antioxidation agent, and the content of MetHb was successfully controlled to 2.3% in the final purified hemoglobin product.

Production of Ethyl (S)-(-)-4-Chloro-3-hydroxybutyrate by Asymmetrical Reduction of Ethyl 4-Chloroacetoacetate with Aureobasidium pullulans SW0202

ZHONG Ping;SUN Zhi-hao

. 2005, 5(6): 665-669.

Asbtract ( )

PDF (325KB) ( )

Related Articles | Metrics

Aureobasidium pullulans SW0202 with high enantioselectivity for asymmetric reduction of ethyl 4-chloroacetoacetate (COBE) to ethyl (S)-4-chloro-3-hydroxybutyrate (S-CHBE) was isolated. The asymmetric reduction of COBE to optically active CHBE catalyzed by Aureobasidium pullulans SW0202 in aqueous phase was also investigated. The reduction was conducted in K2HPO4-KH2PO4 buffer, and the concentrations of COBE and CHBE as well as optical purity of the product were determined by capillary gas chromatography (GC) and chiral capillary GC respectively. The results showed that the optimal conditions for the conversion were the initial cell concentration 0.32 g/mL(wet weight), the initial COBE concentration 20 g/L, pH 7.0 and the temperature 30℃. The molar conversion rate reached 79.6% (20.32 g/L CHBE), with 97.8% e.e. Subsequently the experimental results of batch supplement of substrate indicate that this strategy can greatly reduce substance inhibition.

Relationship between Fatty Acid Ester and Maituolaimycin Production in Streptomyces regensis 099

WANG Zhi-ping;LI Liang-zhi;YUAN Ying-jin

. 2005, 5(6): 670-674.

Asbtract ( )

PDF (426KB) ( )

Related Articles | Metrics

To establish the relationship between the biosynthetic pathway of a primary metabolite fatty acid ester and that of a novel macrolide maituolaimycin, a multi-separation chromatographic method was used to separate and purify the fatty acid ester from the fermentation broth of Streptomyces regnesis 099. And the structure of this fatty acid ester was identified using NMR and ESI-MS. A rational model was built in regard to the relationship of the two mentioned above and was validated by the fermentation experiments. The results showed that both polyketide biosynthetic pathway and fatty acid ester biosynthetic pathway existed in the strain, which is helpful to the optimization of fermentation technology.

Fermentation of Penicillium sp. to Produce Lignin Peroxidase

RUAN Fang-yong;YUAN Hong-li

. 2005, 5(6): 675-679.

Asbtract ( )

PDF (343KB) ( )

Related Articles | Metrics

The optimal liquid-state fermentation conditions of Penicillium sp. P6 to produce lignin peroxidase were studied. The effects of rice bran, maize bran, wheat bran, GMY media, the volume of medium and temperature of culture were investigated. In addition, the effects of adding benzyl alcohol and MnSO4 to the media on LiP formation were also studied. The results of orthogonal experiments on the effects of supplemented MnSO4, wheat bran content and medium pH showed that the optimal conditions for LiP production were as follows: wheat bran 50 g/L, initial pH 4.8 and MnSO4 5 mmol/L, and the maximum activity of LiP reached 2.69 U/mL. The whole results showed that the suitable conditions were inoculum of 1.1×106 mL-1, fermentation time 8 d, added liquid volume ratio of 150 mL to 500 mL triangular flask, wheat bran content in medium of 50 g/L, pH 4.8 and MnSO4 5.66 mmol/L.

Effect of Ultrasonic Wave on the Extraction of Shikonin and Its Derivatives from Arnebia euchroma Roots

GUAN Yi;GE Feng;WANG Xiao-dong;ZHAO Bing;WANG Yu-chun

. 2005, 5(6): 680-683.

Asbtract ( )

PDF (310KB) ( )

Related Articles | Metrics

The ultrasonic extraction technique was used to extract shikonin and its derivatives from Arnebia euchroma roots. The effects of ultrasonic power, temperature, extracting time, herbal powder size and liquid-to-solid ratio on the extraction of shikonin were studied. The ultrasonic wave extraction results showed that the optimal extraction conditions were as follows: the powder size of Arnebia euchroma roots was 80 mesh (180 mm), liquid-to-solid ratio 12 mg/L, temperature 50℃, extraction time 25 min and ultrasonic power 1800 W.

Effect of Ammonium Salt on the Growth of Spirulina platensis

LI Bo;KANG Rui-juan;ZHANG Xu;CONG Wei;TAN Tian-wei;CAI Zhao-ling

. 2005, 5(6): 684-687.

Asbtract ( )

PDF (330KB) ( )

Related Articles | Metrics

The effects of different concentrations of ammonium sulphate and ammonium acetate in the medium on the growth of Spirulina platensis were studied. The results showed that the ammonium salts as nitrogenous resources can be used by S. platensis effectively. The endurable concentrations of ammonium sulphate and ammonium acetate by S. platensis were 0.5 and 0.6 g/L, and related concentrations of NH4+-N were 212 and 109 mg/L, removal efficiencies of NH4+-N were 85.38% and 99.7% respectively. The content of protein was increased markedly when ammonium acetate was added to the medium.

Synthesis and Lower Temperature Sintering of Nanocrystalline Ce0.8Gd0.2O2-d

LIANG Jin;ZHU Qing-shan

. 2005, 5(6): 688-692.

Asbtract ( )

PDF (2296KB) ( )

Related Articles | Metrics

Reactive nanocrystalline Ce0.8Gd0.2O2-d (GDC) nanopowder has been successfully synthesized via a modified carbonate coprecipitation method. Azeotropic distillation treatment was applied to dry the carbonate precipitates, where the dehydration process was proved to be effective to alleviate hard agglomerate formation during high temperature calcination, as confirmed by the BET and FESEM characterizations. The results showed that after calcination at 600℃, the powder from the precursor with the azeotropic distillation treatment has a specific surface area of 49.0 m2/g, which is substantially higher than that of the powder from the precursor without the azeotropic distillation treatment. Sintering behavior of these two kinds of powder was investigated via dilatometry and isothermal sintering, and revealed that the powder from the precursor with the azeotropic distillation treatment showed better sintering activity, where uniaxially pressed compacts were sintered to over 98% of theoretical density at 1100℃ for 10 h. The superior sinterability was mainly attributed to the fact that azeotropic distillation treatment reduced the tendency of hard agglomeration formation for the as-synthesized powders, which allows to form green compacts in high green density with high homogeneity.

Nanosized ZnO Prepared by Microwave Homogeneous Precipitation and Its Photocatalytic Property

;

. 2005, 5(6): 693-697.

Asbtract ( )

PDF (746KB) ( )

Related Articles | Metrics

Using zinc sulfate and urea as raw materials, nanosized ZnO was prepared by homogeneous precipitation under microwave irradiation. The effects of reaction temperature, reaction time, reactant concentrations and reactant ratio on the nanosized ZnO were investigated. TEM, SEM, IR, TGA, XRD and UV-Vis were used to characterize the synthesized ZnO nanoparticles. The UV-Vis absorption property was detected by the UV-Vis spectrophotometer. The results show that the nanosized ZnO has an extremely strong absorption at the wavelength range between 200 and 380 nm, and also a relatively strong absorption at visible region. The photocatalytic degradation of methyl orange by ZnO under UV ray irradiation was studied. The concentration of methyl orange in the ZnO solution was measured by spectrophotometry. The photocatalytic properties of nanosized ZnO synthesized with different methods were compared. The rate constant K was obtained.

Database and QSPR of Physical Properties of Ionic Liquids

SUN Ning;ZHANG Suo-jiang;ZHANG Xiang-ping;LI Zeng-xi

. 2005, 5(6): 698-702.

Asbtract ( )

PDF (371KB) ( )

Related Articles | Metrics

The data of physical properties for ionic liquids in the period from 1984 to 2004 were collected and a database of ionic liquids was established. There are totally around 600 ionic liquids and 3500 data in the database. The quantitative structure-property relationship (QSPR) of the melting points was studied for two common kinds of ionic liquids, disubstituted imidazolium tetrafluoroborate and disubstituted imidazolium hexafluorophosphate. This work is of importance to the design and application of ionic liquids.

Table of Content