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Separation and identification of nitrogen compounds in coal-tar pitch

✍ Scribed by Jaroslav Černý; Jiří Mitera; Petr Vavrečka

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
591 KB
Volume
68
Category
Article
ISSN
0016-2361

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✦ Synopsis

Chromatographic

behaviour of 64 pure hydrocarbons and nitrogen compounds was verified by gel permeation chromatography.

It was found that the elution volumes of almost all nitrogen compounds were higher than the elution volumes of aromatic hydrocarbons. This knowledge was used in the separation of nitrogen compounds from coal-tar pitch extracts. The obtained concentrates with a high nitrogen content were analysed by mass spectrometry to determine the mass representation of the individual groups of nitrogen compounds. The analysed concentrates contained carbazoles and their benzo-derivatives as the main nitrogen compounds.

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Investigation of nitrogen compounds in coal tar products. 2. Basic fractions
✍ Paul Burchill; Alan A. Herod; Pritchard Ernest 📂 Article 📅 1983 🏛 Elsevier Science 🌐 English ⚖ 837 KB

Gas chromatography (g.c.), in conjunction with nitrogen-selective alkali flame detection (AFD) and mass spectrometry (m.s.), has been used for the detailed examination of nitrogen compounds in basic fractions from an anthracene oil and a low-temperature coal tar. The compounds identified were mainly