Process for the continuous manufacture of n-butyraldehyde by sel

Details Process for the continuous manufacture of n-butyraldehyde by sel Process for the continuous manufacture of n-butyraldehyde by sel

1982-03-12

1984-05-22

Lone, Werren B.

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

Organic compounds

Oxygen containing

C07C 4562

Patent

active

044503008

ABSTRACT:
For the continuous manufacture of n-butyraldehyde by selective hydrogenation of crotonaldehyde, the hydrogenation is conducted in the liquid phase in the presence of a palladium-aluminum oxide supported catalyst containing the palladium in the outer layer of the supporting grain of a thickness of 0.05-0.2 mm. The palladium content of this catalyst is 0.1-0.6% by weight. The aluminum oxide support, with a specific pore volume of 0.4-0.6 cm.sup.3 /g, has 40-60% of its pores of a diameter of >0.5 nm and an internal surface area of 130-160 m.sup.2 /g. The hydrogenation is conducted under absolute pressures of 5-50 bar and at temperatures of 20.degree.-100.degree. C. The resultant n-butyraldehyde is of a high purity without interfering by-products.

REFERENCES:
patent: 2485989 (1949-10-01), Smith
patent: 2930765 (1960-03-01), Cooper et al.
patent: 2930766 (1960-03-01), Lacey
patent: 4177214 (1979-12-01), Siclari

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