Azeotropic Distillation
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. CONCEPTUAL DESIGN OF NON-IDEAL MIXTURE SEPARATION WITH LIGHT ENTRAINERS
Abstract A method is proposed to study the separation of minimum-, maximum-boiling azeotropic, and low volatility mixtures with a light entrainer, to investigate feasible regions of the key operating parameters reboil ratio (S) and entrainer - feed flowrate ratio (FE/F) for continuous processes. The thermodynamic topological predictions are carried out for 1
Braz. J. Chem. Eng.. Publicado em: 2016-12
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2. Synthesis by coprecipitation of india-stabilized zirconia and codoping with MoO3, WO3, TaO2.5, or NbO2.5 for application as thermal barrier coatings
Coprecipitation synthesis of nanocrystalline india-stabilized zirconia with high surface area and codoping with MoO3, WO3, TaO2.5, or NbO2.5 is reported. The concentration of codopants was defined by the charge-compensating mechanism. Ethanol washing followed by azeotropic distillation and freeze drying were compared as dehydration techniques for the gels. A
Mat. Res.. Publicado em: 05/02/2016
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3. THERMODYNAMIC TOPOLOGICAL ANALYSIS OF EXTRACTIVE DISTILLATION OF MAXIMUM BOILING AZEOTROPES
Abstract This paper provides a feasibility study of azeotropic mixture separation based on a topological analysis combining thermodynamic knowledge of residue curve maps, univolatility and unidistribution curves, and extractive profiles. Thermodynamic topological features related to process operations for typical ternary diagram classes 1.0-2 are, for the fi
Braz. J. Chem. Eng.. Publicado em: 2015-12
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4. Simulation of ethanol extractive distillation with mixed glycols as separating agent
Extractive distillation is an alternative for ethanol dehydration processes that has been shown to be more effective than azeotropic distillation and, in close proximity, to be very competitive against the process that uses adsorption with molecular sieves. Glycols have been shown to be the most effective solvents in extractive distillation, mainly ethylene
Braz. J. Chem. Eng.. Publicado em: 2014-03
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5. Simulação do processo de adsorção psa para separação da mistura etanol-água / Simulation of the adsorption process psa for separation of ethanol-water mixtures
One of the problems with ethanol production is the high energy cost which is associated with the separation of ethanol due to of excess water and the existence of an azeotrope in the mixture ethanol-water, by conventional distillation the mixture can be separated up to 95% weight. Currently, there is great interest in the development of technological process
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/07/2011
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6. Separation of ethanol and water by extractive distillation with salt and solvent as entrainer: process simulation
The aim of this work is to simulate and analyze an extractive distillation process for azeotropic ethanol dehydration with ethylene glycol and calcium chloride mixture as entrainer. The work was developed with Aspen Plus® simulator version 11.1. Calculation of the activity coefficients employed to describe vapor liquid equilibrium of ethanol - water - ethyl
Brazilian Journal of Chemical Engineering. Publicado em: 2008-03
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7. Dehydration by azeotropic distillation of glycerine obtained as byproduct of biodiesel production. / Desidratação por destilação azeotrópica da glicerina obtida como subproduto da produção do biodisel.
O trabalho visa substituir processos comercialmente usados na indústria para purificação da glicerina obtida a partir de biodiesel. A purificação da glicerina até grau técnico ou P.A. (99,5 % em massa) implica em um grande consumo de energia nos processos de evaporação e destilação, pela necessidade de altos vácuos. Como alternativa, a desidrata�
Publicado em: 2008
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8. Desenvolvimento de um programa para geração de mapas de curvas residuais e aplicação a processos de destilação azeotropica e extrativa
Despite the development of new separation processes, the predominant unit operation used in chemical industries is, still, distillation, especially for large-scale separation of non-ideal mixtures. Many papers have dedicated special attention to the study of azeotropic mixtures, looking for the development of design and synthesis tools. Residue curve maps pl
Publicado em: 2002
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9. Estudo de processos de produção de etanol anidro através da destilação extrativa salina com recuperação do agente de separação
One technique has been used largely in production of anhydrous ethanol is azeotropic distillation with benzene, which carcinogenic properties are well-known. An alternative process, ecologically viable, is extractive distillation by salt effect. The use of a soluble salt in dehydration of ethanol allows a reduction in energy requirement, besides producing en
Publicado em: 1999
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10. Sintese e modelagem do processo de destilação azeotropica
This work represents a contribution to the synthesis of azeotropic distillation process, that is used to the separation of non-idealliquid mixtures, with the modelling of Steady-State Three-Phase Azeotropic Distillation Column. The following developments were carried out in this thesis: . Modelling and Simulation of Three-Phase Flash: development of the mode
Publicado em: 1998
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11. Minimização de emissão de poluentes na sintese de resinas fenolicas
This work describes the optirnization of a novolac resm synthesis catried out m a batch reactor. Basically, the main purpose of this work is to reduce the concentration of phenol in the efluent, because this is the largest problem in the process, since in the industry the concentration of phenol in the efluent is between 20.000 and 50.000 ppm, wich is a high
Publicado em: 1995
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12. Caracterização termodinamica de sistemas ternarios para escolha de processos de separação
The objective of this work is to develop a methodology for studing the vapor-(liquid)-liquid phase behaviour of ternary systems and for rapidly determining the partial miscibility presence by using the commercial simulator PROII. The methodology uses flash simulation to do liquid-(liquid)-vapor equilibrium calculations simulation results are used to generate
Publicado em: 1995