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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Estudo de parâmetros reacionais em moinho de bolas na síntese de aril(heteroaril)-1h-pirazóis / Study of reaction parameters in ball mill in the Synthesis of aryl(heteroaryl)-1h-pyrazoles

Paveglio, Guilherme Caneppele 08 August 2012 (has links)
Conselho Nacional de Desenvolvimento Científico e Tecnológico / This paper describes a study of reaction parameters in a ball mill in the synthesis of 1H-pyrazole acid catalyzed. The studied parameters were: amount of reactants, frequency, reaction time, amount of catalyst, number of milling balls, different catalysts, diameter and material of the milling balls. Another study was conducted to study the mechanism of solid-solid reaction involved in the cyclocondensation between enaminones and hydrazine hydrochloride acid catalyzed. These mixtures were studied by thermal analysis (TGA and DSC), where eight enaminones were evaluated and four eutectic mixtures were identified. / Este trabalho descreve o estudo de parâmetros reacionais em moinho de bolas na síntese de 1H-pirazol catalisada por ácido. Os parâmetros estudados foram: quantidade de reagentes, frequência, tempo, quantidade de catalisador, número de esferas, diferentes catalisadores, diâmetro e material das esferas de moagem. Outro trabalho realizado foi o estudo do mecanismo de reação sólido-sólido envolvido na reação de ciclocondensação entre enaminonas e cloridrato de hidrazina catalisada por ácido. Estas misturas foram estudadas através de análises térmicas (TGA e DSC), sendo que de oito enaminonas avaliadas, 4 misturas eutéticas binárias foram identificadas.

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