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:
Oct. 15, 1985
Filed:
Apr. 16, 1984
Biau-Hung Chang, Worthington, OH (US);
Ashland Oil, Inc., Ashland, KY (US);
Abstract
A method of reactivating anionic Group VIII hydroformylation catalysts to maintain high selectivity towards linear products. In the process of manufacturing aldehydes and alcohols from olefins, hydrogen, carbon monoxide and a catalyst, the selectivity for linear products is extremely high when an anionic Group VIII catalyst is used. This selectivity, after prolonged use of a catalyst, falls off along with the turnover number. The catalyst is reactivated to increase the selectivity towards linear products as well as the turnover number by subjecting the catalyst to a reducing agent which is strong enough under treatment conditions to reduce the anionic Group VIII catalyst. Reactivation of anionic iron, ruthenium, osmium, and mixed transition metal complex catalysts are particularly described and claimed.