Identification and cleavage of breakable single bonds by selective oxidation, reduction, and hydrolysis. Quarterly report No. 12, June 1-September 30, 1981
We assume that bituminous coal consists mostly of an aggregate of condensed aromatic and aliphatic rings, connected and made insoluble (but swellable) by crosslinks containing single bonds. The objective of this project is to determine the proportions of the various kinds of connecting links and how they can best be broken - in other words, to determine the structure of bituminous coal, with emphasis on the crosslinks and breakable single bonds. The program began with an investigation of the structure of the TIPS fraction of Illinois No. 6 coal, that is, the two-thirds of the 16% extracted by pyridine that is toluene-insoluble, pyridine-soluble, mostly through changes in molecular weight during cleavage reactions in pyridine solution. The most promising of these cleavage reactions are now being applied to the 84% of coal that is insoluble in pyridine and presents the main problem in coal liquefaction, following the progress of the reactions by formation of soluble material and swelling of the insoluble portion. We found that benzylamine (BnNH/sub 2/) would extract an additional 14% (of the original weight of coal) of material from pyridine-extracted coal, and later that an ethylenediamine/dimethyl sulfoxide (EDA/DMSO) mixture would dissolve another 21% of the original coal. The BnNH/sub 2/ extract is soluble in pyridine. Our best present guess is that the BnNH/sub 2/ extract cleaves most of the ester groups in coal and that EDA/DMSO cleaves the remaining ester and most of the ether groups.
- Research Organization:
- SRI International, Menlo Park, CA (United States)
- DOE Contract Number:
- AC22-78ET11423
- OSTI ID:
- 6099004
- Report Number(s):
- SRI-7902; ON: DE82003773
- Country of Publication:
- United States
- Language:
- English
Similar Records
Identification and cleavage of breakable single bonds by selective oxidation, reduction, and hydrolysis. Quarterly report No. 10, January 1-March 31, 1981
Identification and cleavage of breakable single bonds by selective oxidation, reduction, and hydrolysis. Annual report, October 1, 1980-September 30, 1981
Related Subjects
COAL
CHEMICAL BONDS
HYDROGENATION
OXIDATION
REDUCTION
STRUCTURAL CHEMICAL ANALYSIS
AMINES
BITUMINOUS COAL
CLEAVAGE
COAL EXTRACTS
FRACTIONATION
ORGANIC SOLVENTS
PYRIDINE
AZINES
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
ENERGY SOURCES
FOSSIL FUELS
FUELS
HETEROCYCLIC COMPOUNDS
MATERIALS
MICROSTRUCTURE
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PYRIDINES
SEPARATION PROCESSES
SOLVENTS
010600* - Coal
Lignite
& Peat- Properties & Composition