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Superacid coal chemistry. 3. Electrophilic substitution of coals under ‘stable ion’ conditions and the conversion of functionalized coals with the HF:BF3:H2 liquefaction system

✍ Scribed by George A. Olah; Mark R. Bruce; Edward H. Edelson; Altaf Husain

Publisher: Elsevier Science
Year: 1984
Tongue: English
Weight: 440 KB
Volume: 63
Category: Article
ISSN: 0016-2361
DOI: 10.1016/0016-2361(84)90352-1

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✦ Synopsis

Electrophilic ethylation and nitration of Illinois No. 6 coal was carried out using CH3CH2F:SbF, in SOZ at -40°C and NO,+ BFq in trimethylphosphate solution at room temperature, respectively. The effect of these substituents on the reactivity of coal under the HF:BF,:H, coal liquefaction system was studied. Ethylation increases the susceptibility of coal to this superacidic catalyst system while nitration is found to decrease the extent of depolymerization of coal.

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✍ George A. Olah; Altaf Husain 📂 Article 📅 1984 🏛 Elsevier Science 🌐 English ⚖ 582 KB

Selected model compounds representing coal structural entities were studied under the conditions of HF-BF,H, catalysed mild coal liquefaction. Bibenzyl and diphenylmethane gave near quantitative conversion at room temperature without added hydrogen. Biphenyl, however, required hydrogen pressure at 1