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extraction process entrainers Role of entrainers in supercritical fluid extraction of ... Jan 01, 1991 Extraction efficiencies ranging 1085 1086 from 70 - 100% were achieved with suitable entrainers/modifiers for polychlorinated biphenyls, toxaphene and DDT in soil.
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1996-10-1 The clean-up of contaminated soils by supercritical fluid extraction (SFE) can be increased significantly with entrainers. Lab-scale and technical-scale experiments were carried out with contaminated soils and PAH spiked soil, because of their low volatility which renders their removal. There ...
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1991-1-1 Experiments were carried out to optimize the extraction parameters and define the role of entrainers under varied matrix conditions. INTRODUCTION The increasing awareness of chemical pollutants and the desire to promote a cleaner environment have created a demand for improved decontamination technologies.
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2009-12-10 Entrainers under the same conditions and levels influence the extraction efficiency in the following order: acetic acid > ethanol > water. All three entrainers achieved the best effects at the highest concentration (15%), both at the temperatures of 40 and 70 °C, except for a slight decrease for acetic acid as a entrainer at 70 °C. SEM results showed that the crystal is the shortest and thinnest and XRD results showed that the highest crystallinity crystals were obtained when acetic acid ...
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A flow apparatus for measuring the solubility of a solid solute in a supercritical fluid with a small amount of entrainers was established. Ethanol, acetone and n-hexane were selected as entrainer, respectively, the solubilities of biphenyl, diphenylamine and beuzoic acid in supercritical CO_2 with one of these eutrainers were obtained in a pressure range of 10-30MPa and temperature range of ...
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1992-3-9 EFFECTS OF ENTRAINERS ON THE PHASE EQUILIBRIUM OF SUPERCRITICAL FLUID EXTRACTION PROCESS ZHANG Jianjun; ZHU Meiwen; YU Enping; ZHANG Zeting Beijing Institute of Chemical Technology, Beijing 100029, China Received:1992-03-09 ...
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With above calculations, an improved ACN extraction distillation process using ILs as an entrainer was proposed, and a configuration for the new process was constructed. Based on the established thermodynamic models which have considered the properties from the molecular structure of ILs, process simulation was performed to obtain the process parameters which are important for the new process
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2016-11-1 The conceptual engineering of a new process proposed for the aromatic–aliphatic separation from naphtha has been developed based on extractive distillation using the 1-ethyl-3-methyl imidazolium dycianamide [EMIM][DCA] ionic liquid as entrainer.
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2021-2-1 A suitable entrainer in liquid-liquid extraction should promote high selectivities (S ij ∞), and capacities (k j ∞), to provide an efficient separation of the components without the
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2021-6-15 In the process of ED, it is very important to choose a proper entrainer. Therefore, the extraction mechanism of HAc-H 2 O with different entrainers at micro level was studied based on quantum chemistry calculation method. COSMO-SAC model has been well received by the majority of scientific researchers because of its good prediction ability.
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2019-5-25 Ind. Eng. Chem. Res. All Publications/Website. OR SEARCH CITATIONS
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This process design is considered to be comparatively effective because of the lower total energy requirement needed in the process . The choice of extraction solvent severely affects the efficiency of the extraction process. Kürüm et al. (1995)[4] evaluated 34 types of possible entrainers
Read MoreA flow apparatus for measuring the solubility of a solid solute in a supercritical fluid with a small amount of entrainers was established. Ethanol, acetone and n-hexane were selected as entrainer, respectively, the solubilities of biphenyl, diphenylamine and beuzoic ...
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A multi-scale simulation method is proposed to enable screening of ionic liquids (ILs) as entrainers in extractive distillation. The 1,3-butadiene production process with acetonitrile (ACN) was chosen as a research case to validate the feasibility of the methodology. Ab initio calculations were first carried out to
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Sazonova, A., Raeva, V., Frolkova, A.: Design of extractive distillation process with mixed en-trainer: in uence of multiple inputs, Editor: Marko², J., ... entrainers have been chosen equal to L ...
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2015-9-17 the individual sand particles with small amounts of oil cover after extraction. The final extracted sand could be subjected to bioremediation prior to charging back to the mine as an environmentally friendly disposal mechanism. Keywords: Tar Sands, Supercritical Fluid Extraction, Carbon Dioxide, Entrainers, Environmentally Friendly Process . 1.
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2004-9-7 Degussu AG, Process Technology, VT-F, D-63457 Hanau, Germany. Matthias Seiler, Degussu AG, Process Technology, VT-F, D-63457 Hanau, Germany. Wolfgang Arlt, Technische Universität Berlin, Institut für Verfahrenstechnik, Fachgebiet Thermodynamik und Thermische Verfahrenstechnik, D-10623 Berlin, Germany. Search for more papers by this author
Read More2021-1-9 When BD (dry) extraction is regarded as the benchmark for total lipid recovery [29, 46], DME method of 1st extraction process extracted 26.4% of the total raw lipids and 54.4% of the total FAMEs in the microalgae.Therefore, the DME preferred to extract lipid component (represented by FAME) rather than non-lipid part; otherwise, the ratio of total raw lipids and FAMEs being extracted should be ...
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Translations in context of "the extraction process" in English-French from Reverso Context: Different polymer compositions of the fibers (20) permit the 'chemical tuning' of the extraction process.
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Made available by U.S. Department of Energy Office of Scientific and Technical Information ...
Read MoreA flow apparatus for measuring the solubility of a solid solute in a supercritical fluid with a small amount of entrainers was established. Ethanol, acetone and n-hexane were selected as entrainer, respectively, the solubilities of biphenyl, diphenylamine and beuzoic acid in supercritical CO_2 with one of these eutrainers were obtained in a pressure range of 10-30MPa and temperature range of ...
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This paper presents a preliminary design framework for finding suitable homogeneous entrainers E to separate minimum boiling azeotropic mixtures AB by extractive distillation. The framework incorporates techniques such as Computer Aided Molecular Design (CAMD), addressing process needs and targeted thermodynamic properties. New thermodynamic criteria are considered for the entrainer design ...
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1990-2-1 The extraction of a broad range of hydrocarbons from crude oil in reservoirs induces dynamic miscibility within reasonable distances from reservoir injection. The efficiency of the process has been hindered, however, by poor sweep efficiency resulting from the unfavorable mobility of gaseous CO2 and gravity segregation.
Read More2021-3-12 Low transition temperature mixtures (LTTMs) are versatile alternatives to ILs. They share many properties with ILs, so they become a suitable choice for entrainers in extractive distillation processes. In this study, glycolic acid and choline chloride in a 3:1 molar ratio (GC3:1) were synthesized and explored as entrainers for separation of acetonitrile + water azeotropic mixtures. Isobaric ...
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The separation of azeotropic mixtures is an “old” engineering problem that cannot be solved by simple distillation processes. One of the current ways to overcome this problem is to use other types of processes, such as extractive/ azeotropic distillation or liquid–liquid extraction, where entrainers or extraction solvents are applied. Liquid–liquid extraction
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PROCESS PROGRAM SRI INTERNATIONAL ABSTRACT Menlo Park, Califomir 94025 Process Economics Program Report No. 197 SUPERCRITICAL FLUID PROCESSING
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Abstract Strawberries are one of the most popular fruits in Japan and they have a high antioxidant content. In this study, the contents in strawberry receptacles were extracted with supercritical carbon dioxide and entrainers. Using ethanol, acetone, and water as entrainers improved the antioxidant capacity and increased the amounts of total saccharides and cinnamic acid in the extract.
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Supercritical carbon dioxide extraction system. The basic configuration and flow diagram of the SFE system are shown in Fig. 6. The system is configured with a liquefied carbon dioxide feed pump (2), an entrainer feed pump (5), a high-pressure vessel (8), a thermostatic bath (10), an optional detector for monitoring the extraction process, and a back-pressure regulator valve for controlling ...
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2018-12-21 Methyl acetate is considered low toxicity volatile solvent produced either as a by-product during methanol carbonylation or via acetic acid esterification with methanol. In both cases, pure methyl acetate has to be isolated from the reaction mixture. Simulation of methyl acetate separation from its mixture with methanol by extraction distillation was carried out in ASPEN + software.
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الصين -تشنغ تشو -المنطقة الوطنية للتنمية الصناعية للتكنولوجيا المتطورة، جادة العلوم رقم 169.
الاتصال: 0371-86549132.