Results 241 to 250 of about 43,768 (290)

Mass transfer modelling for solvent dehydration by pervaporation

Separation and Purification Technology, 2000
Abstract A set of equations for design and optimisation of solvent dehydration by pervaporation is developed based on a model of mass transport through membranes that permeate preferentially water. This model assumes a mechanism of sorption–diffusion–desorption and introduces a diffusion coefficient which is dependent on the membrane water ...
Jorge Miguel Neto, Maria Norberta Pinho
exaly   +2 more sources

Solvent effect in H-BEA catalyzed cyclohexanol dehydration reaction

Journal of Chemical Physics
The solvent effect on H-BEA catalyzed cyclohexanol dehydration was investigated in water, dioxane, and cyclohexanol. The dynamic evolution of the Brønsted acid site of zeolite and its interaction with reactant molecules in different solvents were explored with ab initio molecular dynamics simulations, providing reliable configuration sampling to obtain
, Huimin Chen
exaly   +3 more sources

Analysis of Dynamic Characteristics and Control Strategies of a Solvent Dehydration Distillation Column in a Purified Terephthalic Acid Plant

Processes, 2020
In this study, a solvent dehydration column of purified terephthalic acid (PTA) plant was used as the research object. Based on a dynamic model of the solvent dehydration column, a dynamic sensitivity analysis of the key parameters was carried out using ...
Xiuhui Huang, Zeqiu Li
exaly   +2 more sources

The effect of solvent addition on fructose dehydration to 5-hydroxymethylfurfural in biphasic system over zeolites

Journal of Catalysis, 2012
The effect of organic solvent addition during dehydration of fructose over zeolites has been investigated as a way to enhance the 5-hydroxymethylfurfural (HMF) selectivity.
Vitaly V Ordomsky, John Van Der Schaaf, J C Schouten   +2 more
exaly   +3 more sources

Two-dimensional MXene incorporated chitosan mixed-matrix membranes for efficient solvent dehydration

Journal of Membrane Science, 2018
Pervaporation dehydration is an energy efficient process for purifying organic solvents, whose application depends on the development of highly permeable and selective membranes.
Zhi Xu, Gongping Liu, Hua Ye
exaly   +3 more sources

Membranes for the dehydration of solvents by pervaporation

Journal of Membrane Science, 2008
Abstract This review aims at summarizing the main research carried out up to 2007 in hydrophilic pervaporation. Both polymeric and inorganic membranes are examined and the dehydration of alcohols such as ethanol and isopropyl alcohol covered in depth. When considering polymeric membranes, the research has been categorised into sections based upon the
Peter D. Chapman, Teresa Oliveira, Andrew G. Livingston, K. Li   +3 more
openaire   +1 more source

Pervaporative Dehydration of Organic Solvents

Separation Science and Technology, 1997
Pervaporative separation of acetone/water and isopropanol (IPA)/water systems has been studied in the water-lean range of composition of the feed mixtures. Poly(vinyl alcohol) (PVA) membranes crosslinked with citric acid, adipic acid, maleic acid, glutaraldehyde, and glyoxal were used for this purpose.
M. C. Burshe, S. A. Netke, S. B. Sawant, J. B. Joshi, V. G. Pangarkar   +4 more
openaire   +1 more source

Solvent-Dehydrated Calvarial Allografts in Craniofacial Surgery

Plastic and Reconstructive Surgery, 2004
Craniofacial surgery almost always requires the use of bone grafting. Although autografts are the standard procedure for bone grafting, it is sometimes not possible to harvest bone, and autografts have particular risks. The use of allograft bone provides a reasonable alternative to meet the need for graft material.
Ibrahim, Vargel, Gökhan, Tunçbilek, Emin, Mavili, Ayşenur, Cila, Sevket, Ruacan, Kemal, Benli, Yücel, Erk   +6 more
openaire   +2 more sources

The solvent-free thermal dehydration of tetritols on zeolites

Carbohydrate Research, 2000
A new alditol dehydration method at high temperatures, in the presence of molecular sieves without solvent in an argon atmosphere, is described. Investigations on tetritols have been carried out. Products arising after the intramolecular and intermolecular elimination of water, with retention or inversion of the configuration of asymmetric carbon atoms,
M, Kurszewska, E, Skorupa, R, Kasprzykowska, P, Sowiński, A, Wiśniewski   +4 more
openaire   +2 more sources

Densities of collagen dehydrated by some organic solvents

Experientia, 1966
Der Einfluss von organischen Losungsmitteln auf die Dichteveranderungen des Kollagens wurde gepruft. Methanol und Butanol fuhrt zur Strukturauflockerung, Aceton und Dioxan zur Strukturverdichtung.
V, Podrazký, V, Sedmerová
openaire   +2 more sources