Effect of precipitation time and solvent power on asphaltene characteristics

Fuel ◽  
2017 ◽  
Vol 208 ◽  
pp. 271-280 ◽  
Author(s):  
Estrella Rogel ◽  
Michael Moir
Keyword(s):  
2017 ◽  
Author(s):  
Jose A. Pomposo

Understanding the miscibility behavior of ionic liquid (IL) / monomer, IL / polymer and IL / nanoparticle mixtures is critical for the use of ILs as green solvents in polymerization processes, and to rationalize recent observations concerning the superior solubility of some proteins in ILs when compared to standard solvents. In this work, the most relevant results obtained in terms of a three-component Flory-Huggins theory concerning the “Extra Solvent Power, ESP” of ILs when compared to traditional non-ionic solvents for monomeric solutes (case I), linear polymers (case II) and globular nanoparticles (case III) are presented. Moreover, useful ESP maps are drawn for the first time for IL mixtures corresponding to case I, II and III. Finally, a potential pathway to improve the miscibility of non-ionic polymers in ILs is also proposed.


2005 ◽  
Vol 44 (24) ◽  
pp. 9307-9315 ◽  
Author(s):  
Sebastiano Correra ◽  
Massimo Merlini ◽  
Alberto Di Lullo ◽  
Daniel Merino-Garcia

1872 ◽  
Vol 20 (130-138) ◽  
pp. 67-70 ◽  

In the following experiments a number of stout tubes of refractory glass of the annexed shape were employed. Each tube was closed at one end, and had a flanged mouth at the other. The limb A was 11/2 inch long, the limb B 2 inches, and C 7 inches. In making the experiments, each tube was first filled, to an extent of 51/2 inches of its length, with highly dried crystals of mercuric cyanide; a small fragment of asbestus* was then pushed tightly against the end of the cyanide by means of a thin rod of gutta percha, and the bend of the tube cleaned by means of a slender brush. A number of taper plugs of gutta percha were previously made by softening, the end of a rod of that substance in boiling water and then chilling it ; and loops of thin copper wire were also prepared for the purpose of securing the plugs.


Sign in / Sign up

Export Citation Format

Share Document