Avaliação de diferentes adsorventes na recuperação de metanol utilizado em cromatografia líquida de alta eficiência (CLAE)

• Ano de defesa: 2006
• Autor(a) principal: Ferreira, Leonardo Oliveira
• Orientador(a): Maria, Luiz Cláudio de Santa
• Banca de defesa: Marques, Mônica Regina da Costa , Pacheco, élen Beatriz Acordi Vasquez
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade do Estado do Rio de Janeiro
• Programa de Pós-Graduação: Programa de Pós-Graduação em Química
• Departamento: Centro de Tecnologia e Ciências::Instituto de Química
• País: BR
• Palavras-chave em Português: Metanol; Resina de troca iônica; Cromatografia líquida de alta eficiência
• Palavras-chave em Inglês: Methanol recovery; Ion-exchange resin; High performance liquid chromatography
• Área do conhecimento CNPq: CNPQ::CIENCIAS EXATAS E DA TERRA::QUIMICA::QUIMICA ANALITICA
• Link de acesso: http://www.bdtd.uerj.br/handle/1/15810

In this dissertation, different absorbent materials were evaluated for extraction of organic compounds from methanolic solution used for high efficiency liquid chromatography (CLAE). The active coal, Betonite K-10 clay, commercial resins from Rohm and Haas: Amberlyst A26OH (resin containing quaternary ammonium group) and Amberlyst 15WET (resin containing sulfonic group) and three synthetic resins: RP03 (based on acrylonitrile and divinylbenzene), RP09 (based on methacrylamide, styrene and divinylbenzene) and RP12 (based on acrylic acid, styrene and divinylbenzene) were evaluated. These resins had been prepared by means of the copolymerization in glyceric suspension of the involved comonomers using the free radical initiation. The copolymer pearls had been produced in the presence of a diluent system aiming the production of porous structures. The copolymers had been characterized by means of apparent density, specific area, average diameter and volume of pores, optical (OM) and scanning electron microscopies (SEM) and elemental analysis (CHN). These materials had been evaluated in the removal of sibutramine and biperidene chlorhydrates dissolved in methanol in different extraction times. The extractions had been carried out in batch at ambient temperature. The initial and final concentrations had been determined by high efficiency liquid chromatography (CLAE). In a general way, the synthetic and commercial copolymers had presented the best extraction capacities of the chlorhydrates. In special, the Amberlyst 15WET resin has presented the more efficient sorption of the two chlorhydrates compared to the other absorbent.