Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 131 for “"liquid extraction"”.
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Liquid extraction with single droplets-effect of chemical reaction
… interfacial motion not usually observed when two liquids are in contact"--Abstract, page i-ii.
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The Modification of Solvents for Liquid-Liquid Extraction Processes
… to modify the efficiency of selected solvents in liquid-liquid extraction by the addition of small amounts of additives would offer advantages in extraction, solvent recovery and inventory costs. Therefore, the literature relating to desirable solvent properties, variations in solvent use, methods …
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Novel Liquid extraction method for detecting Native-wood Formaldehyde
… can hinder the complete formaldehyde extraction. In order to have a complete formaldehyde extraction, a stronger nucleophile than hydroxyl and water groups is needed. In this study cross-linked poly (allylamine) (PAA) beads were synthesized and used as a strong nucleophile to extract …
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Liquid-liquid extraction of rare earth elements from sulfuric acid
This thesis is concerned with the liquid-liquid extraction and separation of Y, Ce, La, binary mixtures, and ternary mixtures as well as synthesis of novel amide ligands for the extraction of rare earth elements. Chapter I is the general introduction of the practical process and applications of …
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Liquid-liquid extraction of carotenoids from palm oil (Elaeis guineensis)
… had values within the standards. The liquid-liquid extraction at temperatures of 40, 45, and 50 °C. First, studies were conducted to evaluate the phase-forming capability and extraction performance of low-toxicity, low-cost, and environmentally friendly organic solvents. According to …
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Liquid-liquid extraction in a pilot scale rotating disc contactor
… and mass transfer characteristics of a liquid-liquid extraction process in a 450 mm diameter, 4.30 m high Rotating Disc Contactor (R.D.C.) has been undertaken. The literature relating to this type of extractor and the relevant phenomena, such as droplet break-up and coalescence, drop …
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Advanced liquid-liquid extraction : studies in a laboratory mixer-settler
… obtained by the NRTL equation have been found. Extraction processes have been analysed. A model for determination of the time needed for a countercurrent stage-wise process to come to steady state has been derived. The experimental data was in reasonable agreement with this model. The discrete …
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Liquid-liquid Extraction Studies in a Pilot Scale Agitated Column
A study has been made of the hydrodynamics and mass transfer characteristics of the Rotating Disc Contactor. The literature relating to this extractor and relevant phenomena, e.g. droplet break-up and coalescence, single drop mass transfer, axial mixing and phase inversion/flooding, has been …
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Comparison of Liquid-Liquid Extraction and Solid Phase Extraction of Mephedrone
… This experiment focused on comparing liquid-liquid extraction to solid phase extraction to determine if there was a difference and which was more efficient. Synthetic urine samples were spiked with mephedrone, extracted using both methods, and analyzed with GC-MS. Spiked synthetic …
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Mechanisms of liquid extraction in a pilot plant sieve plate column
… and mass transfer in perforated (sieve)plate liquid-liquid extractor columns has been reviewed. An experimental investigation was conducted in a 450 mm diameter perforated plate extractor with four plates using four different designs with holes of 1.588 mm, 3.175 mm, 4.763 mm and 6.350 mm, …
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A study of liquid-liquid extraction in a sieve plate column
The literature relating to sieve plate liquid extraction columns and relevant hydrodynamic phenomena have been surveyed. Mass transfer characteristics during drop formation, rise and coalescence, and related models were also reviewed. Important design parameters i.e. flooding, dispersed phase …
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Liquid-Liquid Extraction in Agitated Contactors Involving Droplet Coalescence and Redispersion
Rotary agitated liquid-liquid extractors have been classified in terms of the rate of energy imparted to the dispersed phase, and whether contact is stagewise or differential. In the high energy contactors a droplet coalescence-redispersion mechanism predominates, The literature pertaining to these …
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Enhancing Bioethanol Fermentation through Removal of Acetic Acid Using Liquid-Liquid Extraction
… energy. Second-generation biofuel refers to liquid fuels that are produced from non-food resources and reduce the total greenhouse gas emission by at least 60 %. Acetic acid has been shown to be one of the most ubiquitous fermentation inhibitors in a bioethanol production facility which slows …
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Liquid-liquid extraction of biopolymers : selective solubilization of proteins in reverse micelles
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1986.
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The Development of Energy Efficient Wastewater Treatment: Electrochemical Oxidation and PFACs liquid-liquid Extraction
… compounds. For the third problem, we developed Liquid-liquid extraction to extract and separate specific refractory degradable: PFACs. To improve the EAOPs' energy efficiency, The EAOPs system was optimized at three levels: 1) System level: energy recovery system, and electric power mode; 2) …
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