Accession Number:

AD0630970

Title:

USE OF COARSE POROUS GLASS IN GAS-ADSORPTION CHROMATOGRAPHY FOR THE SEPARATION OF LIQUID HYDROCARBONS,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Report Date:

1966-01-21

Pagination or Media Count:

18.0

Abstract:

The possibility is pointed out of using coarse porous glass for the separation of normal alkanes and aromatic hydrocarbons with boiling temperatures up to 150C by the method of gas-adsorption chromatography. A study of the dependence of the effectiveness of the column with coarse porous glass on the linear speed of the gas-carrier indicated the possible use of such columns at great linear speeds. From the chromatograms taken at various temperatures, the adsorption heats of a series of hydrocarbons on the hydroxylated surface of silicon were determined. The adsorption heats of normal alkanes and normal alkyl benzenes increase linearly with the increase in the number of carbon atoms in the molecule. The adsorption heat of ethylene is greater than that of benzene, and that of alkyl benzene is greater than the corresponding n-alkanes because of the specific interaction, primarily, of the pi-electron bonds with the hydroxyl groups of the surface. The values determined from the chromatograms of heat adsorption were close to those obtained calorimetrically. Author

Subject Categories:

  • Industrial Chemistry and Chemical Processing
  • Organic Chemistry
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE