Affordable Access

Ion-exchange resins in the isolation of nitrogen compounds from petroleum residues.

Authors
Type
Published Article
Journal
Journal of Chromatography A
0021-9673
Publisher
Elsevier
Publication Date
Volume
1027
Issue
1-2
Pages
171–177
Identifiers
PMID: 14971500
Source
Medline

Abstract

In this work, preparative liquid chromatography was used for the separation of the nitrogen compounds in a sample of heavy gas oil from a Brazilian petroleum. Initially it took place a pre-fractionation by neutral aluminium oxide and the compounds were separated in different classes such as: hydrocarbons, resins (compounds of low molecular mass and intermediate polarity) and asphalthenes (polar compounds with high molecular mass). A comparison of the fraction of resins was performed by re-fractionating with modified silica (with potassium hydroxide and hydrochloric acid), or with ion exchange resins (Amberlyst A-27 and A-15), being isolated the basic and neutral compounds, that were analyzed by GC-MS in the scan and selected ion monitoring modes. Quinolines, benzoquinolines, tetrahydroquinolines were found in the basic fraction and carbazoles derivatives were found in the neutral fraction.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments
F