Hydrogenation of alkyl oxalates

Details Hydrogenation of alkyl oxalates Hydrogenation of alkyl oxalates

1986-03-27

1987-03-10

Evans, J. E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

502527, C07C 29136, C07C 3120

Patent

active

046492267

ABSTRACT:
An improved calcined hydrogenation catalyst shape which is useful for the catalysis of hydrogenation reactions in a tubular reactor is provided. The catalyst shape has an annular configuration with an open center core, and wherein the shape contains, as a reinforcing matrix distributed therein, up to about 50 percent by weight of milled glass fibers having specific dimensions and wherein the crush strength of the shape is vastly improved with little change in catalytic activity over the non-reinforced shape of comparable size. Additionally, when the shapes of the present invention are employed pressure-drop and diffusion problems are reduced. The catalyst shapes are particularly useful for the hydrogenation of alkyl oxalates to ethylene glycol whereby the reaction can be conducted at lower temperatures and hence by-product formation is minimized.

REFERENCES:
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patent: 4112245 (1978-09-01), Zehner et al.
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patent: 4366093 (1982-12-01), Shiozaki et al.
patent: 4440873 (1984-04-01), Miyazaki et al.
patent: 4551565 (1985-11-01), Miyazaki et al.

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