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Evaluation of solvents for carbon-13 n.m.r. analysis of solvent-refined coals. sym-Triazine a new carbon-13 n.m.r. solvent

โœ Scribed by Kaizaburo Saito; Richard J. Baltisberger; Kenneth J. Klabunde; Virgil I. Stenberg; Neil F. Woolsey

Publisher
Elsevier Science
Year
1979
Tongue
English
Weight
409 KB
Volume
58
Category
Article
ISSN
0016-2361

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โœฆ Synopsis

Solvent-refined lignite (SRL) and bituminous coals (SRC) are only partially soluble in good standard carbon-13 n.m.r. solvents. A survey of other possible solvents for SRLs and SRCs showed thatsymtriazine at 86ยฐC solvated SR L as well as pyridine, but did not absorb in the regions of interest (5-60 and 90-160 ppm relative to TMS). Model hydrocarbons, phenols and an alcohol in sym-triazine gave aromaticities (fa) accurate within the standard deviation (0.01 to 0.001) when proper FT carbon-13 techniques were used. An alkene and an aliphatic amine reacted with sym-triazine and gave inaccurate values of fa.

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