Síntese de líquidos iônicos N-Alquil-N-Aril-Imidazólicos e estudo exploratório de suas aplicações na indústria do petróleo
Ano de defesa: | 2012 |
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Autor(a) principal: | |
Orientador(a): | |
Banca de defesa: | |
Tipo de documento: | Dissertação |
Tipo de acesso: | Acesso aberto |
Idioma: | por |
Instituição de defesa: |
Universidade Federal do Espírito Santo
BR Mestrado em Química Centro de Ciências Exatas UFES Programa de Pós-Graduação em Química |
Programa de Pós-Graduação: |
Não Informado pela instituição
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Departamento: |
Não Informado pela instituição
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País: |
Não Informado pela instituição
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Palavras-chave em Português: | |
Link de acesso: | http://repositorio.ufes.br/handle/10/4682 |
Resumo: | In this work, a new class of ionic liquids has been prepared by Radziszewski’s reaction from aromatic amines resulting in N-aryl substituted imidazols. Alkylation of these compounds by either mesylates or tosylates generated aryl alkyl ionic liquids which by metathese reaction formed ionic liquids with tetrafluoroborate, hexafluorophosphate, bis(trifluoromethylsulfonyl)amide or 1,1,2,2,3,3,4,4,4-nonafluorbutanosulfonate anions. Reaction yields range from moderate to good.Nitrogen or sulfur extraction capabilities of the ionic liquids prepared were evaluated using a solution of nitrogen or sulfur compound in n-dodecane as a model oil. Good results were obtained when p-nitro aryl substituted ionic liquid was used with a 99.93 % removal of the nitrogen compound (acridine) and 72.88 % of sulfur compound (dibenzothiophene) whereas extraction with dialkyl imidazole ionic liquids (1-butyl-3-methylimidazol) resulted in 62.35 and 37.96% removal, respectively.Additionally, demulsifying action of the p-nitro aryl ionic liquid was tested on a medium crude (oAPI 27.4) with 5.60% emulsified water. Despite high efficiency on water removal on preliminary tests, further work is necessary due to deposition of solid material. |