Results 81 to 90 of about 2,636 (212)

Overcoming the Ethanol/Water Azeotrope: A Review on Advanced Technologies for Bioethanol Purification

Engineering Reports
Ethanol dehydration is a crucial task in the production of bioethanol for fuel applications. Such separation represents a challenge due to the presence of the ethanol‐water azeotrope.
Fernando Israel Gómez‐Castro, Hilda Elizabeth Reynel‐Ávila, Araceli Guadalupe Romero‐Izquierdo, Claudia Gutiérrez‐Antonio, Didilia Ileana Mendoza‐Castillo, Adrián Bonilla‐Petriciolet, Oscar Daniel Lara‐Montaño, Mayra Margarita May‐Vázquez, Salvador Hernández   +8 more
doaj   +1 more source

Using Dialkylimidazolium Ionic Liquids To Break the Methanol + Methyl Acetate Azeotrope

, 2019
Separating mixtures that form azeotropes or have relative volatilities close to 1.0 has always been a challenging problem. Conventional distillation cannot yield high purity products for these systems, so separating them often becomes a capital- and ...
Joshua M. Winnert (7945424), Joshua M. Winnert, V. K. P. Janakey Devi, V. K. P. Janakey Devi (7945427), Joan F. Brennecke (1335486), Joan F. Brennecke   +5 more
core   +1 more source

The Methanol-Trimethoxyborane Azeotrope as a Solvent for Acid-Catalyzed Reactions. Methyl Esterification [PDF]

, 1977
Carboxylic acids UIIldergo a rapid and complete acid-catalyzed methyl esterification in the methanol-trimethoxyborane azeotrope. The reaction is first order in cariboxylic acid and first order in strong acid catalyst.
Kantner, S. S., Kreevoy, M. M.
core   +1 more source

Simulation and optimization of a modified salt extractive distillation process for the production of anhydrous ethanol

Results in Chemistry
Producing anhydrous ethanol through ethanol dehydration is challenging due to the formation of an ethanol-water azeotrope. Traditional methods use carcinogenic liquid separating agents like benzene to break this azeotrope.
Manish Kumar Yadav, Saumya Agarwal, Shilpi Verma, Vimal Chandra Srivastava, Urška Lavrenčič Štangar, Praveen Kumar   +5 more
doaj   +1 more source

Dehydration of an azeotrope of ethanol/water by sodium carboxymethylcellulose membranes cross-linked with organic or inorganic cross-linker

eXPRESS Polymer Letters, 2010
To control the swelling of sodium carboxymethylcellulose (CMCNa) membranes, mixtures of CMCNa and glutaraldehyde (GA) and mixtures of CMCNa as an organic component and tetraethoxysilane (TEOS) as an inorganic component were prepared, and CMCNa/GA cross ...
doaj   +1 more source

Thermodynamic and topological analysis of the formation of internal tangential azeotropes in binary two-phase systems

Тонкие химические технологии, 2015
The analysis of properties of the internal tangential azeotrope that leads to biazeotropy as a result of the bifurcation was carried. Internal tangential azeotrope has a number of specific properties, some of which is identical to usual binary azeotropes,
L. A. Serafimov, T. V. Chelyuskina, R. A. Yakushev   +2 more
doaj  

Sustainable Approach to Waste-Minimized Sonogashira Cross-Coupling Reaction Based on Recoverable/Reusable Heterogeneous Catalytic/Base System and Acetonitrile Azeotrope

, 2016
In this contribution, we present a chemically efficient and sustainable protocol for the palladium-catalyzed copper-free Sonogashira cross-coupling reaction, based on the use of a heterogeneous catalytic system.
GRUTTADAURIA, Michelangelo, Vaccaro, L., Mclaughlin, M., Aprile, C., Vadym Kozell (3190974), Michael McLaughlin (778543), Stefano Santoro (1295103), Strappaveccia, Giacomo, BIVONA, Lucia Anna, McLaughlin, Michael, Lucia Anna Bivona (3190977), Santoro, S., Vaccaro, Luigi, Luigi Vaccaro (1496110), Michelangelo Gruttadauria (1713208), Giacomo Strappaveccia (1713205), Santoro, Stefano, Carmela Aprile (2394760), Aprile, Carmela, Kozell, V., Kozell, Vadym, Strappaveccia, G.   +21 more
core   +1 more source

The diagrams of -1-lines for ternary

Тонкие химические технологии, 2011
Different properties and types of α-1-lines for ternary zeotropic mixtures and ternary mixtures with one binary azeotrope are presented in a brief literature review.
K. Yu. Tarkhov, L. A. Serafimov
doaj  

The conditional extremum lines research for the soperfluous gibbs potential surface for stratified systems

Тонкие химические технологии, 2010
The possibility of a technique application revealing the probable existence area triple azeotrope, based on analysis of concentration dependences of activity coefficient complexes in liquid phases, in stratified zeotropic mixtures, mixtures containing ...
А. V. Frolkova, V. V. Illarionov, L. А. Serafimov   +2 more
doaj  

Tangential azeotropy in binary constituents of ternary azeotropic mixtures.

Тонкие химические технологии, 2009
Transformations of phase diagrams of vapor-liquid equilibrium for ternary systems containing single triple azeotrope are considered. The considered transformations include the stage of border tangential azeotropy.
L. A. Serafimov, V. M. Raeva, L. I. Chernykh   +2 more
doaj