Molybdenum disulfide catalyst and the preparation thereof

Details Molybdenum disulfide catalyst and the preparation thereof Molybdenum disulfide catalyst and the preparation thereof

1979-06-11

1981-01-06

Gantz, Delbert E.

Compositions

Preservative agents

Anti-oxidants or chemical change inhibitants

252438, 423 53, B01J 2702, B01J 2724, C01G 3700

Patent

active

042435544

ABSTRACT:
High surface area molybdenum disulfide, MoS.sub.2, is produced by the thermal decomposition of selected ammonium thiomolybdate salts at temperatures of about 300.degree.-800.degree. C., with said salts being heated to decomposition temperature at a rate in excess of about 15.degree. C./min., e.g., about 20.degree.-30.degree. C./min., in an essentially oxygen-free atmosphere. 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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Sulphide Catalysts their Properties and Applications, Otto Weisse and Staneslas Landa. Pergamon Press, 1973, p. 57, Printed in Czechoslovokia.
"Thermal Decomp. of (NH.sub.4).sub.2 MoO.sub.2 S.sub.2 ", T. P. Prasad et al., J. of Inorg. Nucl. Chem., 1973, vol. 35, pp. 1895-1904.
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