Buscar
Mostrando ítems 1-10 de 30
H3PO4- and H2SO4- treated niobic acid as heterogeneous catalyst for methyl ester production
(SpringerDordrechtHolanda, 2010)
Esterification of acetic acid with alcohols using supported niobium pentoxide on silica–alumina catalysts
(2008)
Supported niobium pentoxide catalysts are active for a variety of acid and redox catalyzed reactions such as dehydration, hydrogenation and esterification. In this work, niobium pentoxide has been supported on silica–alumina ...
Valorización catalítica de triosas: obtención de ésteres del ácido láctico y otros oxigenados valiosos
(2017-06-30)
En esta tesis se investigó la transformación en fase líquida de un compuesto hidroxicarbonílico obtenido durante la conversión de azúcares en las biorefinerías, la dihidroxiacetona (DHA). El objetivo fue convertir DHA en ...
Influence of Water on Enzymatic Esterification of Racemic Ketoprofen with Ethanol in a Solvent-Free System
(Springer/Plenum Publishers, 2019-05)
The effect of water added in the kinetic resolution of rac-ketoprofen with ethanol catalyzed with Candida antarctica lipase B was investigated under reaction conditions and at a molecular level. The reaction was performed ...
Producción de acetato de fusel por destilación reactiva
(Bogotá - Ingeniería - Doctorado en Ingeniería - Ingeniería QuímicaUniversidad Nacional de Colombia - Sede Bogotá, 2020-07-02)
En este trabajo se investigan las trayectorias directas de procesos de destilación reactiva (DR) para la síntesis de acetatos a partir de la esterificación de ácido acético con aceite de fusel (AF). El problema se encuentra ...
Desenvolvimento e otimização da produção de diésteres de etileno glicol (biolubrificantes) por hidroesterificação enzimática do óleo de fritura
(Universidade Federal de Minas GeraisBrasilENG - DEPARTAMENTO DE ENGENHARIA QUÍMICAPrograma de Pós-Graduação em Engenharia QuímicaUFMG, 2021-10-29)
The aim of this Dissertation (Master of Science) has been the production of na enzimatic biocatalyst capable of synthesizing diesters with lubricant properties (biolubricants) through hydroesterification of used soybean ...
Propuesta de desarrollo de recetas de cocina experimental con base en tres frutas de la familia de las rosáceas
(2017)
This intervention project analyzes the particularities of certain fruits that make up the Rosacea`s family. We will work directly with strawberries, raspberries and blackberries; will be the base for producing experimental ...
Produção de materiais à base de carbono a partir do bio-óleo e suas aplicações como catalisadores ácidos
(Universidade Federal de Minas GeraisExternas/Outras Instituições, 2022)
Produção de polietileno furanoato a partir do diéster metílico do ácido 2,5-furanodicarboxílico derivado do xarope de glicose
(Universidade Federal de Santa MariaBrasilUFSMCentro de Tecnologia, 2022-02-09)
The polyethylene furanoate (PEF) is an alternative over traditional fossil derived polymers, contributing for the reduction of greenhouse gases emissions. Thus, the present work is about the design of an industrial plant ...
Avaliação da toxicidade aguda de fotocatalisadores de nióbio em Daphnia magna e Artemia salina
(Universidade Tecnológica Federal do ParanáCuritibaDepartamento Acadêmico de Química e Biologia, 2014-08-26)
The niobium oxide (Nb2O5) is a white solid, insoluble in water and stable. It's materials are used pure in heterogeneous catalysis, such as promoters and / or carriers. Due to its acidity, is applied to catalytic reactions ...