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Study of an artificial boundary condition based on the damping-solvent extraction method

Qiang XU, Jianyun CHEN, Jing LI, Mingming WANG

Frontiers of Structural and Civil Engineering 2012, Volume 6, Issue 3,   Pages 281-287 doi: 10.1007/s11709-012-0167-5

Abstract: The boundary condition was based on the damping-solvent extraction method.The principle of the damping-solvent extraction method was described.artificial boundary condition was then established by setting two spring-damper systems and one artificial dampingCompared with the damping-solvent extraction method, this boundary condition is easier to be appliedto finite element method (FEM)-based numerical calculations.

Keywords： damping-solvent extraction method     structure-unlimited-foundation system     spring-damper system     artificialdamping limited region     finite element method    

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Extraction of hydrogen chloride by a coupled reaction-solvent extraction process

Yunzhao Li,Xingfu Song,Guilan Chen,Shuying Sun,Yanxia Xu,Jianguo Yu

Frontiers of Chemical Science and Engineering 2015, Volume 9, Issue 4,   Pages 479-487 doi: 10.1007/s11705-015-1512-8

Abstract: A coupled reaction-solvent extraction process was used to remove HCl from a simulated distiller wasteThe extraction performances of various extractants and diluents were compared and the apparent basicityThe yield of HCl from the coupled extraction was 75% with this extraction system.For the coupled extraction, the formation of an R NHCl ion-pair complex was involved in the HCl removalFor the direct extraction, the mechanism involved the formation of hydrogen bonds at high concentrations

Keywords： hydrogen chloride     distiller waste     coupled reaction and solvent extraction     N235     extraction mechanism    

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Vanadium(IV) solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 1,   Pages 56-67 doi: 10.1007/s11705-022-2185-8

Abstract: conditions of pH 0.8, di-(2-ethylhexyl)phosphoric acid concentration of 20%, phase ratio of 1:2, and extractiontime of 8 min, the vanadium extraction could reach 80.00%.reveal that, despite the fact that the chloride ion in the leachate could significantly promote vanadium extractionethylhexyl)phosphoric acid also enter the water phase more easily, which reduces the pH required for the extraction

Keywords： vanadium     black shale     solvent extraction     high acidity extraction    

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A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid

Tingting MA, Ying TENG, Peter CHRISTIE, Yongming LUO, Yongshan CHEN, Mao YE, Yujuan HUANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 1,   Pages 31-42 doi: 10.1007/s11783-012-0463-2

Abstract: optimized procedure based on gas chromatography-mass spectrometry (GC-MS) combined with accelerated solventextraction (ASE) is developed for the analysis of six phthalic acid esters (PAEs), which are priorityQuantification of PAEs in soil employs ultrasonic extraction (UE) (USEPA 3550) and ASE (USEPA 3545),Method reliability is assured with the use of an isotopically labeled PAE, di- -butyl phthalate-d4 (DnBP-D4Instrument detection limits (IDLs) for the six PAEs ranged 0.10–0.31 μg·L and method detection limits

Keywords： phthalic acid esters     quality assurance and quality control     soil type     accelerated solvent extraction     certified    

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Coextraction of vanadium and manganese from high-manganese containing vanadium wastewater by a solventextraction-precipitation process

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 5,   Pages 902-912 doi: 10.1007/s11705-019-1887-z

Abstract: High-manganese containing vanadium wastewater (HMVW) is commonly produced during the vanadium extractionIn this study, an efficient and environmentally friendly method was developed to recover valuable metalsby using a solvent extraction-precipitation process.In the solvent extraction process, 98.15% of vanadium was recovered, and the V O product, with a purityTherefore, this study provides a novel method for the coextraction of V and Mn from HMVW.

Keywords： high-manganese containing vanadium wastewater     solvent extraction     carbonate precipitation     vanadium titano-magnetite    

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Selective removal of iron(III) from highly salted chloride acidic solutions by solvent extraction using

Guoping Hu, Yue Wu, Desheng Chen, Yong Wang, Tao Qi, Lina Wang

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 528-537 doi: 10.1007/s11705-020-1955-4

Abstract: Di(2-ethylhexyl)phosphate acid (D2EHPA) showed high extraction rate and selectivity of Fe over otherThe acidity of the aqueous solution is crucial to the extraction of Fe , and the stoichiometry ratioThe enthalpy for the extraction of Fe using D2EHPA was 19.50 kJ/mol.The extraction of Fe was ≥99% under the optimized conditions after a three-stage solvent extraction

Keywords： solvent extraction     iron     di(2-ethylhexyl)phosphate acid     separation    

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A method of analysis for modal aero-damping of vibrating blade in incompressible flow

Jun XING, Lin LI,

Frontiers in Energy 2009, Volume 3, Issue 4,   Pages 465-471 doi: 10.1007/s11708-009-0037-6

Abstract: By establishing a research model for aero-damping in a uniform incoming flow, the three-dimension analyticalalgorithm of the modal aero-damping based on the equivalent viscous damping principle was establishedThe algorithm, which is suited for low-speed flow, to compute aero-damping is based on classical liftAccording to the analytical equations, the modal aero-damping ratio for different nature frequenciesThe results show that the aero-damping cannot be neglected comparing with the structure damping.

Keywords： compressor     different     three-dimension analytical     classical     low-speed    

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Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Frontiers of Structural and Civil Engineering 2007, Volume 1, Issue 2,   Pages 129-141 doi: 10.1007/s11709-007-0014-2

Abstract: The assumption and problem of the mode-superposition response spectrum method in seismic design codeThe scope of application for the classical damping theory is analyzed and the necessity of the researchon mode-superposition method for non-classical damping is presented.This includes: 1) the complex mode superposition method (in real form) for the non-classically dampedthe non-classically damped system with overcritical damping and the calculation method of seismic response

Keywords： generalization     classical damping     mode-superposition response     calculation formula     damping theory    

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Dynamics of structural systems with various frequency-dependent damping models

Li LI,Yujin HU,Weiming DENG,Lei LÜ,Zhe DING

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1,   Pages 48-63 doi: 10.1007/s11465-015-0330-5

Abstract: over some damping kernel functions.By choosing suitable damping kernel functions of frequency-dependent damping model, it may be derivedBoth the mode superposition method and Fourier transform method are developed for calculating the dynamicresponse of the structural systems with various damping models.conditions into an equivalent one with zero initial conditions and therefore present a Fourier transform method

Keywords： damping     viscoelasticity     dynamic analysis     mode superposition method     Fourier transform method    

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Approximation of structural damping and input excitation force

Mohammad SALAVATI

Frontiers of Structural and Civil Engineering 2017, Volume 11, Issue 2,   Pages 244-254 doi: 10.1007/s11709-016-0371-9

Abstract: The more sensitive parameter to the damage is the damping behavior of the structure.The complexity of structural damping mechanisms has made this parameter to be one of the ongoing researchDespite all the difficulties in the modeling of damping, there are some approaches like as linear andIn the presence of a mathematical model of the damping mechanisms, it is possible to estimate the dampingIn this paper model-based damping approximation method and a model-less structural input estimation are

Keywords： structural modal parameters     damping identification method     input excitation force identification     Inverse    

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Technologies for extracting lipids from oleaginous microorganisms for biodiesel production

Cunwen WANG, Lu CHEN, Bajpai RAKESH, Yuanhang QIN, Renliang LV

Frontiers in Energy 2012, Volume 6, Issue 3,   Pages 266-274 doi: 10.1007/s11708-012-0193-y

Abstract: The process of biodiesel production from microorganisms involves many steps, of which the lipids extractionTherefore, searching for an effective and economical extraction system is critical.Various approaches of lipids extraction are discussed in this review, including traditional extractionprocedures such as solvent extraction, pressing and solvent integrated extraction, as well as some new

Keywords： oleaginous microorganisms     biodiesel     solvent extraction     ultrasound-assisted extraction     microwave-assistedextraction     supercritical fluid extraction (SFE)    

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Dynamic characteristics analysis of active constrained layer damping plate with various boundary conditions

Jing LU, Yu XIANG, Qiao NI

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4,   Pages 449-455 doi: 10.1007/s11465-011-0240-0

Abstract: layer wised principle, the integrated first order differential equation of an active constrained layer dampingThen, this method was expanded to the ACLD plate with cantilever boundary condition by virtue of geometricanalogy method.the extended homogeneous capacity precision integration approach, a high precision semi-analytical methodThe comparison with the literature results has verified the accuracy and effectiveness of the present method

Keywords： active constrained layer damping (ACLD) plate     dynamic characteristics     semi-analytical method     extended    

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Survey on Extraction Methods of Transition Region

Liu Suolan,Yang Jingyu

Strategic Study of CAE 2007, Volume 9, Issue 9,   Pages 89-96

Abstract:  Having the aid of extraction of transition region to segment image is a kind of burgeoning technology

Keywords： transition region     extraction     image segmentation     gradient method     non-gradient method    

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Environmental and economic assessment of vegetable oil production using membrane separation and vapor recompression

Weibin Kong, Qi Miao, Peiyong Qin, Jan Baeyens, Tianwei Tan

Frontiers of Chemical Science and Engineering 2017, Volume 11, Issue 2,   Pages 166-176 doi: 10.1007/s11705-017-1616-4

Abstract: Solvent extraction of crude oil from oilseeds is widely applied for its high production capacity andIn this process, solvent recovery and tail gas treatment are usually performed by adsorption, paraffinNearly 73% of energy can be saved in the process of vegetable oil extraction by the novel processing

Keywords： vegetable oil     solvent-extraction     membrane separation     vapor recompression     environmental and economic assessment    

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Research Advance of Ionic Liquids in Extraction of Metal Ions

Liu Limei,Su Yongqing,Li Cong,He Fei,He Yongfu, Zhong Yun

Strategic Study of CAE 2007, Volume 9, Issue 11,   Pages 187-190

Abstract: They have become a hot research field in separation of metal ions by solvent extraction.

Keywords： ionic liquids     extraction     metal ions     green solvent    

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Title Author Date Type Operation

Study of an artificial boundary condition based on the damping-solvent extraction method

Qiang XU, Jianyun CHEN, Jing LI, Mingming WANG

Journal Article

Extraction of hydrogen chloride by a coupled reaction-solvent extraction process

Yunzhao Li,Xingfu Song,Guilan Chen,Shuying Sun,Yanxia Xu,Jianguo Yu

Journal Article

Vanadium(IV) solvent extraction enhancement in high acidity using di-(2-ethylhexyl)phosphoric acid with

Journal Article

A new procedure combining GC-MS with accelerated solvent extraction for the analysis of phthalic acid

Tingting MA, Ying TENG, Peter CHRISTIE, Yongming LUO, Yongshan CHEN, Mao YE, Yujuan HUANG

Journal Article

Coextraction of vanadium and manganese from high-manganese containing vanadium wastewater by a solventextraction-precipitation process

Zishuai Liu, Yimin Zhang, Zilin Dai, Jing Huang, Cong Liu

Journal Article

Selective removal of iron(III) from highly salted chloride acidic solutions by solvent extraction using

Guoping Hu, Yue Wu, Desheng Chen, Yong Wang, Tao Qi, Lina Wang

Journal Article

A method of analysis for modal aero-damping of vibrating blade in incompressible flow

Jun XING, Lin LI,

Journal Article

Development of a seismic design method based on response spectra for building structures

ZHOU Xiyuan, YU Ruifang

Journal Article

Dynamics of structural systems with various frequency-dependent damping models

Li LI,Yujin HU,Weiming DENG,Lei LÜ,Zhe DING

Journal Article

Approximation of structural damping and input excitation force

Mohammad SALAVATI

Journal Article

Technologies for extracting lipids from oleaginous microorganisms for biodiesel production

Cunwen WANG, Lu CHEN, Bajpai RAKESH, Yuanhang QIN, Renliang LV

Journal Article

Dynamic characteristics analysis of active constrained layer damping plate with various boundary conditions

Jing LU, Yu XIANG, Qiao NI

Journal Article

Survey on Extraction Methods of Transition Region

Liu Suolan,Yang Jingyu

Journal Article

Environmental and economic assessment of vegetable oil production using membrane separation and vapor recompression

Weibin Kong, Qi Miao, Peiyong Qin, Jan Baeyens, Tianwei Tan

Journal Article

Research Advance of Ionic Liquids in Extraction of Metal Ions

Liu Limei,Su Yongqing,Li Cong,He Fei,He Yongfu, Zhong Yun

Journal Article