Compositions – Preservative agents – Anti-oxidants or chemical change inhibitants
Patent
1979-06-11
1981-01-06
Gantz, Delbert E.
Compositions
Preservative agents
Anti-oxidants or chemical change inhibitants
252438, 252431N, 423 53, B01J 2702, B01J 2724, B01J 3112, C01G 3700
Patent
active
042435536
ABSTRACT:
High surface area molybdenum disulfide, MoS.sub.2, is produced by the thermal decomposition of selected substituted ammonium thiomolybdate salts at temperatures of about 300.degree.-800.degree. C., with said salts being heated to decomposition temperature slowly, in an essentially oxygen-free atmosphere, through the temperature interval in which the substantial portion of the particular substituted ammonium thiomolybdate salts decompose. The product molybdenum disulfide has superior catalytic properties for the water gas shift and methanation reactions compared with conventional MoS.sub.2. The stability of the catalyst is enhanced by decomposing the thiomolybdate salt in admixture with an inert, preformed particulate diluent or by bulk doping said salt with tungsten or vanadium prior to decomposition of the salt. The molybdenum disulfide of the invention also has desirable properties for use in catalyzed hydrogenation and hydrotreating reactions, i.e., hydrodenitrogenation and hydrodesulfurization reactions, particularly when employed in nickel or cobalt-promoted form.
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Behan Albert S.
Naumann Alfred W.
Gantz Delbert E.
Humphreys Harrie M.
Union Carbide Corporation
Wright William G.
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