Hydrogenation catalyst

Details Hydrogenation catalyst Hydrogenation catalyst

B - Operations, Transporting

01

J

319/19, 252/63.D

B01J 23/40 (2006.01) B01J 23/74 (2006.01) B01J 37/00 (2006.01) G02B 6/44 (2006.01) H01M 4/88 (2006.01) H01M 4/96 (2006.01)

Patent

CA 1133458

-37/116 ABSTRACT OF THE DISCLOSURE The present invention provides a method of making an improved catalyst useful for hydrogenation of organic compounds and in other reactions. The method comprises mixing a porous particulate refractory support material with a hydrophobic polymeric binder to form an essentially homogeneous mixture and then catalyzing this mixture by introducing into the pores of the mixture a salt of a metal of the eight group of the Periodic Table in a non-polar solvent in which the salt is ionizable. The concentration of the salt is sufficient to provide a catalytic concentration of the metal of the salt of at least about 0.1 mg/cm2. Further in accordance with the method, the salt is reduced to the catalytic metal within the pores of the mixture, specifically within the pores of the support material, by contacting with a selected reducing agent, for example, hydrazine or sodium bis (2-methoxyethoxy) aluminum hydride, preferably in solution. After the reduction is completed, the mixture is washed free of reaction products, except the catalytic metal. A porous structure is formed from the mixture either before or after the catalysis. Preferably, the structure is sintered as a final step. The structure may be in a form of a flat sheet or of any other desired configuration, such as tubular, with or without a support backing or the like. The support material in the mixture is preferably activated carbon having an average part- icle diameter of about 0.01 - 0.3 microns and the structure preferably has pores of an average diameter of about 30 - 300A°. Most preferably, the binder is polytetrafluoroethylene. During the mixing step, the mixture is sheared to a fine filament- like fibrous structure of a uniform spongy nature with no grossly detectable free carbon or polytetrafluoroethylene particles. The type of activated carbon selected preferably Abstract continued has a surface area of about 500 - 600 sq. meters per gram, a tri-modal pore volume distribution and an average pore size of about 5 - 10 microns. The catalyst is characterized, in part, by having high hydrogenation activity while containing a very small concentration of the catalytic metal.

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