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 106 for “"Propanol"”.
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Preparation of green non-ionic surfactants from 2,3-epoxy-1-propanol
Non-ionic surfactants are important materials for use in textile, cosmetic and agricultural fields and have a large share of the overall surfactant global market. In addition, the use of bio raw materials in their production is important for sustainability aspects and can lead to “green” and …
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Dehydrogenation of N-Propanol to Propionaldehyde over a copper chromite catalyst
… from propionaldehyde via the BASF process. n-Propanol is readily available 'in South Africa as a byproduct of Fischer-Tropsch synthesis. This prompted an investigation into the production of propionaldehyde by the dehydrogenation of n-propanol. There is presently no established technology for …
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The synthesis and characterisation of novel ultra-flexible lipidic vesicles using propanol
… the thin film hydration method, this study used propanol for the hydration step for the synthesis and optimisation of propanosomes. Propanol was selected over other solvents due to its more bactericidal property. All formulations were characterised using laser diffraction, zeta sizer and lipid …
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In situ ¹³C NMR monitoring of the dehydration of 2-propanol over H-ZSM-5
… reaction is described. The dehydration of 2-propanol over H-ZSM-5 was observed using solution type techniques. Although this produces broad lines, several mechanistic details were elucidated. This study indicates that: 1) the dehydration does not proceed through a cyclopropyl carbenium ion …
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Solubilizacao e interacao de pigmentos com solventes organicos e agentes tenso-ativos
… monoclorobenzeno, tolueno, metanol, etanol, propanol-1, propanol-2, butanol-1 e octanol-1. Alguns valores representativos obtidos para o logarítimo da absortividade molar (E) da Mn-Pc, são os seguintes: o-diclorobenzeno (E = 4,94); DMSO (E = 4,39); octanol-1 (E = 3,90). Valores …
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Effect of Alcohol Treatments on Soybean Meal Utilization by Ruminants
… meal (SBM) for ruminants was evaluated. Ethanol, propanol and isopropanol were examind at 10, 20, 30 ... 90, 100% (v/v) concentrations. Soybean meal was soaked in an excess of the alcohol-water mixture at 22(DEGREES)C and, after 30 minutes, excess liquid was drained off and the SBM air dried. …
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Thermochemical Study of Crystalline Solutes Dissolved in Ternary Hydrogen-Bonding Solvent Mixtures
… Dibutyl ether, or 1,4-Dioxane), an alcohol (1-Propanol, 2-Propanol, 1-Butanol, 2-Butanol, or 2-Methyl-1-propanol), and an alkane (Cyclohexane, Heptane, or 2,2,4-Trimethylpentane) cosolvents. The Combined NIBS (Nearly Ideal Binary Solvent)/Redlich-Kister equation was used to assess the …
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Flüchtige organische Verbindungen in der Ausatemluft von Kindern und Jugendlichen mit Asthma bronchiale
… ethane, propane, methanol, ethanol, acetone, 2-propanol, n-pentane, isoprene, dimethylesulfide, benzende, toluene, a-pinene, limonene and eucalytole in breath samples from 20 asthmatic patients and 20 healthy controls (age 9-23 years). Three end-exhaled and one ambient air sample were collected …
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The enclathration of alcohols by cholic acid
… in the series CH₃(CH₂nOH (n= 0 to 3 and 2-propanol) were employed as guest molecules and enclathrated in the host lattice of Cholic acid during crystallization. Single crystal structure analyses were performed by X-ray diffraction. Two types of molecular packing were identified. Cholic acid …
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Chemical Identification and Organoleptic Evaluation of Iodine and Iodinated Disinfection By-Products Associated with Treated Spacecraft Drinking Water
… organic compounds: methanol, ethanol, 1-propanol, 2-propanol, 1-methoxy-2-propanol, acetone, and formaldehyde. NASA previously identified all of these compounds in wastewater sources under consideration for recycling into potable water. Experiments were performed at pH 5.5 and 8, iodine …
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Polymorph Selection with Morphology Control Using Solvents and Additives
… environment, and it is established that 1-propanol stabilizes the most metastable form I. This study examines the effect of a range of alcohols on polymorph selection and attempts to elucidate the mechanism. The role of the alcohol functional group in the polymorph selection process is thus …
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Towards a Membrane Electrode Assembly for a Thermally Regenerative Fuel Cell
… products of this fuel cell should be 1-phenyl-1-propanol and electricity. The 1-phenyl-1-propanol should then be converted back to propiophenone, while hydrogen is regenerated by using waste heat and a metal catalyst (Pd/SiO2). The first objective was to find a compatible polymer that would work …
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The oxidation of secondary alcohols by dipotassium tetraoxoferrate (VI) In concentrated and dilute potassium hydroxide solutions
… known purity was used to oxidize three alcohols (propanol-2, 1,1,1-trifluoropropanol-2, and 1,1,1,3,3,3- hexafluoropropanol-2) in 8 ~ potassium hydroxide, and a series of substituted phenyltrifluoromethyl carbinols (m-nitrophenyl-, m-bromophenyl-, p-methylphenyl-, and unsubstituted) in 0.5 …
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Thymol synthesis by acid catalysed isopropylation of m-cresol
… of operation for thymol synthesis from iso-propanol and m-cresol mediated by a commercially available H-MFI zeolite catalyst. A preliminary investigation uncovered seeming anomalies in the course of the synthesis process, in particular counterintuitive trends with respect to m-cresol …
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Reaction Kinetics and Dissociation constants of Tertiary Alkanolamines for Carbon Capture
… {1-[Bis [3-(dimethylamino) propyl] amino]-2-propanol, N, n, n′, n′′, n′′-pentamethyldiethylenetriamine, N, n, n′, n′-tetrakis (2-hydroxyethyl) ethylenediamine, and N, n, n′, n′-tetrakis (2-hydroxypropyl) ethylenediamine}. The experimental results were reported in the form of secondorder …
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The separation of specific enantiomers of anticancer reagent cytarabine using HPLC.
… mobile phase ratios consisting of n-hexane: 2-propanol (50:50, v/v), (60:40, v/v) (70:30, v/v) at a flow rate 1.5ml/min and n-hexane: 2-propanol: diethylamine (50:50:0.2, v/v/v) and (60:40:0.2, v/v/v) at flow rate 1ml/min with excessive overlap. The application of the Chiralcel OJ-H column …
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Síntesis de nanopartículas puras de Ca(OH)2 y suspensiones superhidrofóbicas: Consolidación e hidrofugado de materiales arquitectónicos de interés patrimonial
… a lo largo del tiempo en mezclas de 2-propanol / agua, en las que se encontró que la ausencia de agua era crítica para evitar la aglomeración de Ca(OH)2. Una vez dispersas en 2-propanol, las nanopartículas se han utilizado para consolidar sustratos reales (piedra, adobe y estuco) …
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