CHE SIGNIFICA AZEOTROPE IN INGLESE
azeotropo
Un azeotropo è una miscela di due o più liquidi le cui proporzioni non possono essere alterate dalla semplice distillazione. Ciò accade perché quando un azeotropo è bollito, il vapore ha le stesse proporzioni di costituenti come la miscela non combustibile. Poiché la loro composizione è invariata dalla distillazione, le azeotropie sono anche chiamate miscele costanti a bolle. La parola azeotrope deriva dalle parole greche ζέειν e τρόπος combinate con il prefisso α- per dare il significato globale, "nessuna modifica alla bollitura". Sono state documentate miscele azeotropiche di coppie di composti e sono note anche molte azeotropie di tre o più composti. Sono miscele binarie aventi la stessa composizione in fase liquida e vapore e bollire ad una temperatura costante. In tal caso non è possibile separare i componenti dalla distillazione frazionata. Ci sono due tipi di azeotropi: azeotrope minima bollente e azeotropo massimo bollente. Una soluzione che mostra una maggiore deviazione positiva dalla legge di Raoult costituisce un azeotropo minimo bollente ad una composizione specifica.
definizione di azeotrope nel dizionario inglese
La definizione di azeotropo nel dizionario è una miscela di liquidi che bolle ad una temperatura costante, ad una data pressione, senza cambiamenti di composizione.
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10 LIBRI IN INGLESE ASSOCIATI CON «AZEOTROPE»
Scopri l'uso di
azeotrope nella seguente selezione bibliografica. Libri associati con
azeotrope e piccoli estratti per contestualizzare il loro uso nella letteratura.
1
Handbook of Separation Process Technology
A binary mixture may have a minimum boiling azeotrope. where the boiling
temperature of the azeotrope is less than that of the pure components, or a
maximum boiling azeotrope, where the boiling temperature is higher than that of
the pure ...
2
Organic Chemistry: An Acid—Base Approach
An alternative method for removing water relies on the use of a solvent that forms
an azeotrope with water. An azeotrope is defined as a constant boil- ing mixture
that often boils at a temperature different from its compo- nents. To understand ...
3
Integrated Design and Simulation of Chemical Processes
9.2 HOMOGENEOUS AZEOTROPIC DISTILLATION The problem is finding
feasible separation sequences for breaking the binary azeotrope AB by using
only homogeneous distillation. There are two possibilities: 1. Both pure products
A and B ...
Alexandre C. Dimian,
2003
4
Albright's Chemical Engineering Handbook
p = 1.013 bar 55.7°C 56.2°C X a Acétone 64.4°C 53.4°C 64.7°C 61.2°C
Chloroform Methanol Xb FIGURE 12.14 Ternary diagram of a system containing
three binary azeotropes and one ternary azeotrope. Arrows denote direction the ...
The constituents of a binary azeotrope are separated completely by - (1) adding a
third component to the binary mixture and (2) changing the system pressure. The
third component added (which is relatively volatile) to a binary azeotrope ...
6
Introduction to Process Calculations Stoichiometry
Ans. 0.000b Ex. 2.33 : Ethanol and water forms a azeotrope containing 96%
ethanol by weight. Find the composition of azeotrope by mole %. Hint : Basis of
calculation is not defined in the problem. As composition of azeotrope is given in
...
7
Unit Operations-ii Heat & Mass Transfer
In such cases, complete separation by ordinary fractionation may not be possible.
The constituents of a binary azeotrope are separated completely by - (1) adding a
third component to the binary mixture and (2) changing the system pressure.
8
Unit Operations Handbook: Volume 1 (In Two Volumes)
Point A is the binary feed of 85% ethanol and Point B is the binary azeotrope at
89.4% ethanoL Since we cannot cross directly over the binary azeotrope. it is
obvious that we cannot produce the desired 100% ethanol at Point F by
distillation of ...
9
The Synthetic Organic Chemist's Companion
The reactant is dissolved in a solvent that forms a low-boiling azeotrope with
water. Examples are collected in Table 4. While many chemists are most familiar
with the benzene—water azeotrope, several other azeotropes use far less toxic ...
10
Flavourings: Production, Composition, Applications, Regulations
2.1.3.3.4 Azeotrope Distillation If the equilibrium curves of the mixtures approach
the diagonal sigmoidly in the lower or upper range of the equilibrium diagram,
the point of intersection indicates an azeotrope point [19, 25]. As already set forth,
...
Erich Ziegler, Herta Ziegler,
2008
10 NOTIZIE DOVE SI INCLUDE IL TERMINE «AZEOTROPE»
Vedi di che si parla nei media nazionali e internazionali e come viene utilizzato il termine ino
azeotrope nel contesto delle seguenti notizie.
Jeff Burkhat's Barfly: You can't always get what you want
So pure in fact that it becomes what is called an azeotrope, a combination of pure alcohol and pure water, which has characteristics different ... «Marin Independent Journal, giu 15»
Why Can't You Distill Liquor That's 100 Percent Pure Alcohol?
This is because ethanol is not an ordinary mixture, it's an azeotrope. Instead of boiling purely and separately at two different temperatures, ... «io9, mag 15»
On the Record / Feb. 27, 2015
Title: Azeotrope-like compositions comprising 1-chloro-3,3,3-trifluoropropene. No.: 8,946,312. Inventors: Basu, Rajat (East Amherst); Bement, ... «Buffalo News, feb 15»
Enthralled by evaporation
Careful solvent selection allows water to be removed by forming an azeotrope in the vapour. As an impatient process chemist watches from the ... «Royal Society of Chemistry, feb 15»
Hennessy, Everclear, And Alcohol-Related Violence
http://www.mazepath.com/uncleal/qz4.htm Uncle Al. Everclear is clean distilled ethanol-water azeotrope. Exogenous chemical species' content ... «Discover Magazine, feb 15»
Desdemona Chiang brings the bard's truths to today's stage
“I was very lucky to have George Mount (SSC Artistic Director) attend a few shows I've directed in the past with Azeotrope (my company with ... «The International Examiner, gen 15»
Boom Arts Brings the World to Portland Theaters
Seattle's Azeotrope Theatre and nationally sought-after director Desdemona Chaing make the trip down I-5 for this first-ever collaboration ... «Portland Monthly, ott 14»
Separating Fact From Fiction
In fact, R-410A is termed a near azeotrope and performs as a pure fluid; laboratory and field tests show no composition shift in the refrigerant ... «ACHR NEWS, ott 14»
Guidelines For Troubleshooting R-410A Systems
The company further points out that because R-410A is a near-azeotrope, its temperature glide is smaller than 0.2 degrees, “which is negligible ... «ACHR NEWS, ott 14»
The Essentials Of Working With R-410A
Although refrigerant 410A is a near-azeotrope and has a slight temperature glide, there is no need to correct for refrigerant dewpoint and ... «ACHR NEWS, set 14»