Desulfurization with transition-metal catalysts: scope and mechanism of cleaving carbon-sulfur bonds with subvalent nickel compounds. Final technical report, September 27, 1979-September 26, 1981. [Desulfurization of dibenzothiophene, coal liquids benzylmercaptan, dibenzyl sulfide, dibenzyl disulfide]
Ongoing research in this author's laboratory has uncovered novel nickel(0) reagents that desulfurize dibenzothiophene, a common constituent of coal tar, in an homogeneous medium at temperatures below 100/sup 0/. The first objective of this research was to make a thorough study of the mechanism and scope of this desulfurization, in which study a variety of organic sulfur compounds were examined and the experimental variables maximized for mild, complete reaction. The second objective was to prepare low- or zero-valent transition metal compounds of molybdenum, cobalt and iron, and to test their desulfurizing efficacy on a series of model organosulfur derivatives. These metals were chosen because as high-temperature, heterogeneous catalysts they display desulfurizing activity. After sufficient progress had been made on achieving desulfurization in an homogeneous medium with stoichiometric amounts of these metal complexes, then catalytic desulfurizations in an atmosphere of hydrogen were studied. Finally, samples of solvent-refined coal liquids were treated with such soluble desulfurizing reagents, in order to learn whether any cleavage of sulfide linkages would lead to sulfur removal.
- Research Organization:
- State Univ. of New York, Binghamton (USA). Dept. of Chemistry
- DOE Contract Number:
- AC22-79ET14879
- OSTI ID:
- 5387451
- Report Number(s):
- DOE/ET/14879-T8; ON: DE82005200
- Country of Publication:
- United States
- Language:
- English
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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
ALKALI METAL COMPOUNDS
ALKENES
ALUMINIUM COMPOUNDS
ALUMINIUM HYDRIDES
AMINES
AZINES
BIPYRIDINES
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
COAL LIQUIDS
COBALT COMPLEXES
COMPLEXES
CYCLOALKENES
DESULFURIZATION
ELEMENTS
FLUIDS
HETEROCYCLIC COMPOUNDS
HYDRIDES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
LIQUIDS
LITHIUM COMPOUNDS
LITHIUM HYDRIDES
MEDIUM TEMPERATURE
METALS
NICKEL
NICKEL COMPLEXES
NONMETALS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
PYRIDINES
RESEARCH PROGRAMS
TRANSITION ELEMENT COMPLEXES
TRANSITION ELEMENTS