The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 22, 1984
Filed:
Mar. 12, 1982
Chemische Werke Huels Aktiengesellschaft, Marl, DE;
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.