Optimum conditions for the lithium-liquid ammonia reduction of 4-t-butylcyclohexyl methanesulfonate(I) to t-butylcyclohexane(II) and traps-4-t-butylcyclohexanol(III) were determined. The mesylate I eater was synthesized from alcohol III which was prepared by the lithium aluminum hydridealuminum chloride reduction of commercial 4-t-butyloyclohexanone.The parameters of the lithium-liquid ammonia medium studied were: lithium concentration, proton source, reduction temperature, cosolvent, and reduction time. These parameters were examined in relation to their effect on the lithium-liquid ammonia medium to convert mesylate I to hydrocarbon II and alcohol III. The experimental results for these parameters demonstrated the optimum conditions for the production of hydrocarbon II to be the following: lithium concentration, 0.17 M; added acid, ethanol; reduction temperature, -3300; and cosolvent, ethyl ether. A reduction time of one hour is sufficient when these optimum conditions for the lithium-liquid ammonia medium are satisfied.Vapor phase chromatography and nuclear magnetic resonance spectroscopy were determined to be reliable techniques for the quantitative analysis of the reduction products. The nuclear magnetic resonance spectra of mesylate I and alcohol III were compared.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1961. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 169-173).

Thesis (Ph. D. in Chemistry)--University of California, Berkeley, Sept. 1960. / Includes bibliographical references (leaves 71-72).

Abstract The research focus on the study the market segmentation and product strategy of ultra-high purity anhydrous liquefied ammonia. Liquefied ammonia gas has wide applications in current industrial markets, ultra high purity ammonia gas is a key process material in light emission diode, solar cell and integrated circuit industries. How to develop a new generation NH3 purification process, select multi-type high pressure containers with global logistic supply ability, and qualified international standard iso-container supply system are key successful factors to develop a competitive product promotion and marketing strategy. The research can help domestic green product manufacturers improve their final products market value. Based on expert interview records and secondary data collection, Michael Porter¡¦s five forces model was used to analyze external technical environment challenges and the SWOT analysis was used to analyze the interior condition of special gas. The result shows that the ultra-high purity ammonia gas is facing a highly dynamic environment. The internal human resource management, manufacturing process update flexibility, and diversity in product mix are key factors that affect the relationship between gas suppliers and customers in electronics. Therefore, specialty gas providers need to have a comprehensive gas manufacturing capability, adequate storage capability, and global operational channel in order to meet the need of end customers. Moreover, the speed and capability of the supply system is the key to the future product strategy of high purity ammonia gas.

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 199-214). Available also in a digital version from Dissertation Abstracts.

Orientador : Laszlo Halasz / Dissertação (mestrado) - Universidade Estadual de Campinas, Faculdade de Engenharia de Alimentos e Agricola / Made available in DSpace on 2018-07-15T18:54:42Z (GMT). No. of bitstreams: 1 Murr_FernandaElizabethXidieh_M.pdf: 23760384 bytes, checksum: 9c96226b1d9b16ba4363c6d80ddaa85b (MD5) Previous issue date: 1981 / Resumo: Considerando a importância da provisão dos gêneros alimentícios, parece razoável que todas as novas fontes de energia em potencial sejam utilizadas. Análises e aplicação da energia solar na estocagem e no congelamento de alimentos, surgiram desta preocupação mundial. A Faculdade de Engenharia de Alimentos e Agrícola - Unicamp, proje-tou e construiu um sistema frigorífico de absorção operado por energia solar cujas características principais: aqueci-mento direto da solução e resfriamento a ar o fazem diferenciar dos demais sistemas. Uma simulação em regime permanente foi feita, cujos resultados mostraram alternativas que poderão ser testadas experimentalmente para um futuro apri-moramento do sistema / Abstract: In view of the importance of food supply, it seems rational that all potencial energy sources should be utilized. This worldwide concern led to a wide analysis and application of solar energy for cooling and freezing of foods. The Faculdade de Engenharia de Alimentos e Agrícola- - Unicamp designed and built a solar absorption refrigeration system with the unique feature of direct heating of the solution and air-cooling. The present study concerns a working out of data on intensity of solar radiation inciding on the flat-plate collector and studies of the behavior of the system under local conditions. A steady state simulation was carried out and the results pointed out alternatives that should be confirmed experimentally for future performance im-provement / Mestrado / Mestre em Engenharia de Alimentos

M.S.

A systematic investigation of the reducing action of different metals on an organic compound in liquid ammonia is reported for the first time. / Master of Science

M.S.

A new model for the complex dielectric constant, ε, of aqueous ammonia (NH4OH) has been developed based on laboratory measurements in the frequency range between 2-8.5 GHz for ammonia concentrations of 0-8.5 %NH3/volume and temperatures between 277-297 K. The new model has been validated for temperatures up to 313 K, but may be consistently extrapolated up to 475 K and ammonia concentrations up to 20 %NH3/volume. The model fits 60.26 % of all laboratory measurements within 2σ uncertainty. The new model is identical to the Meissner and Wentz (2004) model of the complex dielectric constant of pure water, but it contains a correction for dissolved ammonia. A description of the experimental setups, uncertainties associated with the laboratory measurements, the model fitting process, the new model, and its application to approximating jovian cloud opacity for NASA's Juno mission to Jupiter are provided.