Group VIII and VIB metal sulfide catalysts, their manufacture an

Details Group VIII and VIB metal sulfide catalysts, their manufacture an Group VIII and VIB metal sulfide catalysts, their manufacture an

1984-09-24

1986-06-24

Metz, Andrew H.

Catalyst, solid sorbent, or support therefor: product or process

Catalyst or precursor therefor

Sulfur or compound containing same

502221, 502313, 502314, 502315, B01J 27051

Patent

active

045967857

ABSTRACT:
This invention concerns a method of preparing catalysts and certain catalysts which can be obtained by the method. The method comprises (a) coprecipitating at least a group VIII metal sulfide with at least a group VIB metal sulfide, at a pH maintained at a value of 4.5 to 8; (b) separating the resultant precipitate; (c) drying the precipitate; and (d) calcining the dried precipitate; all the steps being effected under an inert atmosphere. The catalysts have a stoichiometry of 1.2 to 2.2 atoms of sulfur per metal atom, a crystallographic structure of molybdenite for the group VIB metal sulfide(s) and pyrite for the group VIII metal sulfide(s) and characterized by an X-ray diffraction powder pattern having at least two principal peaks a and b of the disulfide of each group VIB metal used (peaks a, b, c, d), and two principal peaks f and j of the disulfide of each group VIII metal used, (peaks e, f, g, h, i, j, k), the height of the principal peak of a group VIII metal monosulfide (1), if it appears being less than 5 times that of the principal peak (f) of the disulfide of the same metal, which are particularly active for all reactions between hydrogen and a mixture of hydrocarbons containing sulfide compounds.

REFERENCES:
patent: 3660480 (1972-05-01), Pregaglia et al.
patent: 3716497 (1973-02-01), Courty
Candia et al., Bull. Soc. Chim. Belg., vol. 90, No. 12, 1981, pp. 1125-1232.
Breysse et al., "Symposium on Structre . . . Before the Petroleum Chemistry, Inc., Amer. Chem. Soc., K.C. Meeting, 9/12-17/82, pp. 772-781.

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