초록 ▼

High surface area molybdenum disulfide, MoS2, is produced by the thermal decomposition of selected substituted ammonium thiomolybdate salts at temperatures of about 300°-800°C., with said salts being heated to decomposition temperature slowly, in an essentially oxygen-free atmosphere, through the te

High surface area molybdenum disulfide, MoS2, is produced by the thermal decomposition of selected substituted ammonium thiomolybdate salts at temperatures of about 300°-800°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 MoS2. 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.

대표청구항 ▼

A process for the production of improved, sulfur resistant catalysts comprising thermally decomposing a thiomolybdate salt having the formula B2 [MoOxS4-x], where B is a substituted aliphatic ammonium or a cyclic amine containing one or more basic N atoms, and x is 0, 1 or 2, at a decomposition temp

A process for the production of improved, sulfur resistant catalysts comprising thermally decomposing a thiomolybdate salt having the formula B2 [MoOxS4-x], where B is a substituted aliphatic ammonium or a cyclic amine containing one or more basic N atoms, and x is 0, 1 or 2, at a decomposition temperature of from about 300°C. to about 800°C., said substituted ammonium thiomolybdate salt being heated to said decomposition temperature slowly, in an essentially oxygen-free atmosphere, through the temperature interval in which a substantial portion of said substituted ammonium thiomolybdate salt decomposes, said salt decomposing to form a molybdenum disulfide, MoS2, product having desirable properties for use as a catalyst for water gas shift and methanation reactions and for catalyzed hydrogenation or hydrotreating reactions.