Catalytic hydrogenation over rhenium-containing catalysts...

Details Catalytic hydrogenation over rhenium-containing catalysts... Catalytic hydrogenation over rhenium-containing catalysts...

2007-02-06

2007-02-06

Price, Elvis O. (Department: 1621)

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

Catalyst or precursor therefor

Inorganic carbon containing

C502S325000, C502S326000, C568S579000, C568S667000, C568S669000, C568S670000, C568S671000, C568S864000

Reexamination Certificate

active

11104408

ABSTRACT:
In a process for preparing alcohols by catalytic hydrogenation of carbonyl compounds over a catalyst comprising rhenium on activated carbon, the catalyst used comprises rhenium (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5, platinum (calculated as metal) in a weight ratio to the activated carbon of from 0.0001 to 0.5 and, if appropriate, at least one further metal selected from among Zn, Cu, Ag, Au, Ni, Fe, Ru, Mn, Cr, Mo, W and V in a weight ratio to the activated carbon of from 0 to 0.25, and the activated carbon has been nonoxidatively pretreated. It is also possible to prepare ethers and lactones if the hydrogen pressure is not more than 25 bar. In this case, the activated carbon in the catalyst may also have been nonoxidatively pretreated.

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Timofeev et al. Chemical Abstracts 95:80602—“Hydrogenation of maleic anhydride in the presence of platinum group metals and rhenium”, Zh. Prikl. Khim. 54(2), 335-8 (1981).
Broadbent et al., “Rhenium and its Compounds as Hydrogenation Catalysts. III. Rhenium Heptoxide”, J. Org. Chem. 24(7), 1847-54 (1959).

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