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 21 for “"solvent recovery"”.
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Synthesis of batch processes with integrated solvent recovery
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1997.
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A new software tool to environmentally and economically evaluate solvent recovery in the pharmaceutical industry
… associated with the purification and reuse of solvent waste in the manufacture of active pharmaceutical ingredients (API's) were investigated. A software toolbox has been developed that combines Aspen Plus(R) process simulation with SimaPro(R) and Ecosolvent life cycle assessment (LCA) …
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Environmental Remediation Through Tailings Solvent Recovery Unit (TSRU) Waste: Synthesizing Activated Carbon-Zeolite (ACZ) Composites for Enhanced Carbon Dioxide Capture
… This study introduces the treatment of tailings solvent recovery unit (TSRU) tailings waste. It is generated during the oil sands treatment process. In this research, TSRU tailings waste is converted into the activated carbon-zeolite (ACZ) composite. In this thesis two different methods used for …
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The design of a high pressure solvent extraction process using liquid ammonia as solvent
… on the potential use of liquid ammonia as a solvent for the extraction of aromatic hydrocarbons from mixtures with paraffins, and the application of reflux, has been reviewed. Reference is made to extractors suited to this application. A pilot scale extraction plant was designed comprising a …
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Evaluation of solvents for extraction of acetic acid from aqueous solutions
… involves mixing the solution with an immiscible solvent, separating the two phases, and recovery of the desired materials and of solvent from the solvent phase, usually by distillation. Separation is accomplished if certain of the solution components are more soluble in the extracting solvent …
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The Recovery of Valuable Vapour Phase Solvents using Activated Charcoal Cloth
… activated charcoal cloth and their subsequent recovery by regenerating the cloth with low pressure steam was investigated. Additionally, present market areas for activated charcoals have been presented as well as outlining new market fields for activated charcoal cloth. The potential of …
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Design, construction, and evaluation of coal extraction pilot plant to manufacture coal-based carbon pitch
A solvent extraction technique for removing mineral matter, including the inorganic sulfur, from coal has been developed by the Department of Chemical Engineering at WVU. The extraction is preformed at mild conditions (202°C and atmospheric pressure) using the solvent N-Methyl-2-Pyrrolidone …
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Enhancing Bioethanol Fermentation through Removal of Acetic Acid Using Liquid-Liquid Extraction
… stover hydrolysate. Extraction coupled with a solvent recovery unit enhances the bioethanol production through improving the product yield as well as its production rate.</p> <p>Economic assessment of the proposed system showed that incorporating the extraction unit within an industrial scale …
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RECOVERY AND SEPARATION PROCESSES IN THE RECYCLING CHAIN OF POLYAMIDE PLASTIC MATERIALS TO OBTAINECO-SUSTAINABLE RAW MATERIALS
… Group), focused on developing and optimizing a solvent-based recycling process to selectively recover polyamide from post-industrial and post-consumer textile and plastic waste. The process, known as selective dissolution, involves the use of a specific solvent or solvent mixture to dissolve …
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Experimental Studies for Development of a Purification Process for Single and Mixed Amine Solvents
Amine solvents used for the removal of CO2 from flue gas are subject to solvent degradation, which results from the reaction of impurities in the gas stream. This leads to the formation of degradation products, which could lead to many operational problems such as changes in the solvent absorption …
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An investigation of the potential for and application of life cycle analysis in the pharmaceutical industry
… trends demonstrate that manufacture of virgin solvent and solvent waste management contribute significantly more life cycle emissions than comparable processes for commodity chemicals, with the majority of this waste consisting of CO2 and other green house gas emissions. Typically, between 80 …
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The Modification of Solvents for Liquid-Liquid Extraction Processes
The ability 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 …
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Sustainable P2 design for batch-based specialty chemical manufacture
… on the reduction of n-methyl-2-pyrrilodone (NMP) solvent waste in the manufacture of polyimide and polybenzoxazole precursors. The evaluation includes the environmental and economic assessment of solvent recovery and substitution strategies. A two-step distillation process proved effective in …
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Production of phenol-formaldehyde resin composites
… examined. Such a process would eliminate the solvent recovery plant - a necessary stage in current industrial processes. In situ polymerisation has been shown to be chemically feasible.
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Utilization of predispersed solvent extraction for removal and enzymatic degradation of chlorinated solvents in ground water
… extraction method termed Predispersed Solvent Extraction (PDSE) in an <i>ex situ</i> pump-and-treat system to remove trace amounts of dissolved chlorinated solvents like perchloroethylene (PCE) and trichloroethylene (TCE) from contaminated ground water has been investigated. In PDSE, …
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Doctoral Research Project : Sustainable production of bacterial polymers
… emerging as an excellent non-halogenated solvent, yielding 41% dcw of P(3HO-co-3HD-co-3HDD) and demonstrating good solvent recovery. However, chloroform emerged as the only solvent capable of extracting P(3HB), contrary to prevailing literature. Noteworthy, a novel biological extraction …
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A Numerical Simulation Study of the N-SolvTM Process
Given the search for recovery processes that are more efficient with lower water consumption and greenhouse gas emissions than Steam-Assisted Gravity Drainage (SAGD), solvent based recovery processes are a potential alternative. Vapor Extraction (VAPEX) and N-SolvTM are two potentially competing …
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Integrated continuous-flow chemistry enabled by multistage separations
… applications, from multicomponent solvent recovery to in-line removal of phase transfer catalysts. The thesis provides opportunities for future directions. For example, improvement in unit operations, such as pumping, solid handling, evaporation, and process control, will be needed …
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Developing a Novel Ultrafine Coal Dewatering Process
… to address this problem. However, organic solvents in solvent-coal slurries produced during HHS must be recovered for the method to be economically viable. Here, the experimental studies of recovering solvents from pentane-coal and hexane-coal slurries by combining liquid-solid filtration …
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Chemical treatment of bread corn during milling process to eliminate insect contamination
… apparatus based on the operation of the solvent-vapor degreaser for metal parts was constructed. In the resulting tests, it was found that with infested corn suspended in the vapor of boiling carbon tetrachloride or trichloroethylene the mortality of all stages of the rise weevil was 100 …
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