04288422 is referenced by 13 patents and cites 54 patents.

A method is described for the preparation of chalcogenides of ruthenium, rhodium, osmium and iridium transition metals of the Periodic Table of the Elements which comprises mixing in the absence of an aqueous solvent a Group VIII transition metal salt with a source of chalcogenide, said chalcogenide being selected from the group consisting of sulfur, selenium, tellurium and mixtures thereof, yielding a precipitate of the formula MX.sub.y wherein M is selected from the group consisting of ruthenium, rhodium, osmium and iridium, X is sulfur, selenium, tellurium and mixtures thereof and y is a number ranging from about 0.1 to about 3, preferably 0.1 to about 2.5. By the practice of the nonaqueous synthesis technique, Group VIII chalcogenides are prepared which are finely divided, have a high surface area, small particle size and small crystallite size which are also free of excess sulfur, water and/or hydrolysis products. Layered stoichiometric osmium disulfide is prepared by this technique. The precipitates may be cleansed of any anion salt coproduct by any technique common to the art.

Compounds of the formula MX.sub.y thus prepared are superior sulfur-tolerant catalysts in catalytic processes, for example, hydrodesulfurization, hydrodenitrogenation, hydroconversion, hydrogenation.

Title
Method of preparing chalcogenides of group VIII by low temperature precipitation from monaqueous solution, the products produced by said method and their use as catalysts
Application Number
797011
Publication Number
4288422
Application Date
June 16, 1980
Publication Date
September 8, 1981
Inventor
Theresa A Pecoraro
Middletown
NJ, US
Russell R Chianelli
North Branch
NJ, US
Agent
Joseph J Allocca
Assignee
Exxon Research & Engineering Co
NJ, US
IPC
C01G 55/00
C01G 3/12
C01B 19/04
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