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 10 of 10 for “"Alkylbenzene"”.
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Porous Carbon Fiber Functionalization and Thermochemical Degradation of Polystyrene-based Plastics for Resource Recovery
… PS-based engineering plastic into benzene and alkylbenzene were explored. In the first project, a greener REE leaching method followed by solid-phase extraction using functionalized PCF was developed. To dissolve REE in NdFeB magnets, citrate-assisted leaching was developed and achieved over …
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Investigation of the composition of linear alkylbenzenes with emphasis on the identification and quantitation of some trace compounds using GS/MS system in both electron impact and chemical ionization modes
Linear alkylbenzenes, LAB, formed by the Alel3 or HF catalyzed alkylation of benzene are common raw materials for surfactant manufacture. Normally they are sulphonated using S03 or oleum to give the corresponding linear alkylbenzene sulphonates In >95 % yield. As concern has grown about the …
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Experimental and simulation analysis of the jitter response of a single-shot oil switch with a high-K particle suspension
… and branched olefins, silicone and ester fluids, alkylbenzene and transformer oil. Following the oil chemistry evaluation, a high-K particle dielectric was added in concentrations up to 5 % (by weight) to the best-performing fluids. Parameters such as particle concentration, gap spacing, electrode …
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Experiments and Monte Carlo Analysis for the Optical Properties of the Scintillator in SNO+
… scintillator in SNO+ will be made from linear alkylbenzene (LAB). Both the LAB solvent and the Nd loading are new developments. The optical properties of this scintillator and information about radioactive backgrounds should be studied. A calibration source known as the scintillator bucket was …
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QSAR studies of surfactant toxicity to Daphnia magna.
… of this class of anionic surfactant to linear alkylbenzene sulphonate (LAS), it was considered that the log P based QSAR originally developed to describe the toxicity of LAS to D. magna (Roberts, 1989) also would be a good predictor of the acute toxicity for FAES substances. Results of the …
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P-glycoprotein and membrane permeability as determinants of xenobiotic bioavailability and bioaccumulation
… The pesticide dieldrin and surfactant linear alkylbenzene sulfonate (LAS) were selected as mixture components thought to have potential interactions with these determinants of disposition. Initial in situ experiments demonstrated dieldrin and tetracycline both significantly inhibited biliary …
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Life cycle assessment comparison between Pepfactant® and chemical surfactant production.
… of traditional chemical surfactant Lineal Alkylbenzene Sulphonate (LAS) production. Following LCA methodology, a life cycle inventory was compiled based on the simulated AM1 manufacture, which determined the environmental impact assessment for both AM1 and LAS production. In the LCA …
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Pyrolysis-gas chromatography by direct injection of solutions
… for analyzing aqueous solutions containing the alkylbenzene sulfonates. This method provides not only a measure of the total detergent present but also differentiates between the various alkyl groups found in the commercial products. The alkyl groups form the 1-alkenes which can be easily …
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Investigation of oil retention and pressure drop in suction lines using R134a with AB ISO 32
In refrigeration systems, a small quantity of oil, meant for compressor lubrication, is removed from the compressor during operation, by the high velocity refrigerant vapor exiting it, which forms a mixture with the oil. This circulating refrigerant/lubricant mixture affects the system performance …
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Bioaccumulation of microcystins in terrestrial food plants and the development of novel sorbents for monitoring microcystins in irrigation water
… with other pollutants such as metals and Linear Alkylbenzene Sulfonates (LAS), and these can have synergistic effects on the crops irrigated by such waters and exacerbate the human health risks posed by MCs. The current study investigated the bioaccumulation and effects of MCs on food plants, …