Hg). Soxhlet extraction of the residue with pyridine was followed by evaporation of the pyridine extracts as described above. The amount of coal converted to a pyridinesoluble product by the heat/tetralin treatment was 97% on a maf basis. The composition of the pyridine-soluble conversion product in
Solvent effects in the depolymerization of coal
โ Scribed by Larry J. Darlage; Maurice E. Bailey
- Publisher
- Elsevier Science
- Year
- 1976
- Tongue
- English
- Weight
- 565 KB
- Volume
- 55
- Category
- Article
- ISSN
- 0016-2361
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โฆ Synopsis
The depolymerization reaction of coal in the presence of Friedel-Crafts catalysts in a variety of phenolic and non-phenolic solvents has been investigated. Only the phenoiic solvents were found to be useful in this reaction. Some interesting substituent effects were discovered when the isomeric cresols and dihydroxybenzenes were employed as solvents. The influence of temperature and catalyst concentration on the degree of depolymerization has also been examined. With non-phenolic solvents, polymerization is the predominant reaction.
๐ SIMILAR VOLUMES
Demineralized Hiawatha (Utah) coal was divided into narrow density fractions of resinite and vitrinite macerals using a density gradient centrifugation technique. The distribution of an iron-based catalyst in the coal maceral matrix was studied using an electron probe microanalyser. The data indicat