Studies of coupled chemical and catalytic coal conversion methods. Ninth quarterly report, October, November, December 1989
A new base catalyzed C-alkylation reaction that employs a mixture of n-butyllithium and potassium t-butoxide in refluxing heptane to produce coal anions that are subsequently treated with n-alkyl halides at 0{degree}C has been developed. Almost quantitative pyridine solubilization was achieved by C-octylation of a Lower Kittanning coal, PSOC 1197. C-Octylation was less successful for the solubilization of bituminous Illinois No. 6 coal, APCSP 3, and subbituminous Wyodak coal, APCSP 2, which gave 35 and 33% soluble material, respectively. Their O-methyl derivatives yielded 43 and 20% soluble material in the same reaction. The observations are in accord with the concept of Ouchi and his associates that higher rank coals, although more aromatic in character, have a lower degree of polymerization than low rank coals. Relatively mild chemical reactions, such as Calkylation, that lead to modest changes in molecular dimensions, can disrupt intermolecular forces and accomplish solubilization.
- Research Organization:
- Chicago Univ., IL (United States). Dept. of Chemistry
- Sponsoring Organization:
- USDOE, Washington, DC (United States); Link Foundation (United States)
- DOE Contract Number:
- AC22-87PC79938
- OSTI ID:
- 10175386
- Report Number(s):
- DOE/PC/79938--T11; ON: DE92040284
- Country of Publication:
- United States
- Language:
- English
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