Molecular Weight and Aggregation of Heavy Petroleum Fractions Measured by Vapor Pressure Osmometry and a Hindered Stepwise Aggregation Model

2014 ◽  
Vol 28 (10) ◽  
pp. 6179-6187 ◽  
Author(s):  
Linzhou Zhang ◽  
Suoqi Zhao ◽  
Zhiming Xu ◽  
Keng H. Chung ◽  
Changsen Zhao ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Vapor Pressure ◽  
Vapor Pressure Osmometry ◽  
Heavy Petroleum ◽  
Aggregation Model ◽  
Petroleum Fractions

Über Tetraalkylammonium-polyvanadate.

1976 ◽  
Vol 31 (5) ◽  
pp. 544-548 ◽  
Author(s):  
Joachim Fuchs ◽  
Soroush Mahjour ◽  
Rosemarie Palm
Keyword(s):  
Molecular Weight ◽  
Raman Spectrum ◽  
Vapor Pressure ◽  
Vapor Pressure Osmometry ◽  
Vibration Spectra ◽  
Sodium Metavanadate

In the reaction of V2O5 with aqueous or alcoholic solutions of tetraalkylammoniumhydroxide the orange decavanadates (NR4)3H3V10O28, (NR4)4H2V10O28, (NR4)5HV10O28 (NR4)6V10O28 and colourless metavanadates can be obtained. The tetrabutylammoniumsalt [N(C4H9)4]3HV4O12 is the first known metavanadate with discrete polyanion. Its molecular weight was determined by vapor pressure osmometry in chloroform. The Raman spectrum is identical with the spectrum of a sodium metavanadate solution. The vibration spectra of the compounds are discussed and partial assignments were made.

Molecular weight of C60 in solution by vapor pressure osmometry

1993 ◽  
Vol 115 (7) ◽  
pp. 3034-3035 ◽  
Author(s):  
Robert V. Honeychuck ◽  
Thomas W. Cruger ◽  
JoAnn Milliken
Keyword(s):  
Molecular Weight ◽  
Vapor Pressure ◽  
Vapor Pressure Osmometry

Molecular Weight of Petroleum Asphaltenes:  A Comparison between Mass Spectrometry and Vapor Pressure Osmometry

2005 ◽  
Vol 19 (4) ◽  
pp. 1548-1560 ◽  
Author(s):  
Sócrates Acevedo ◽  
Luis B. Gutierrez ◽  
Gabriel Negrin ◽  
Juan Carlos Pereira ◽  
Bernardo Mendez ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Molecular Weight ◽  
Vapor Pressure ◽  
Vapor Pressure Osmometry ◽  
Petroleum Asphaltenes
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