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:
Sep. 21, 1976
Filed:
Apr. 21, 1975
John Reginald Walton, Hull, EN;
Bertram Yeomans, Hessle, EN;
BP Chemicals International Limited, London, EN;
Abstract
Isophorone is produced by feeding a mixture comprising 65 to 85% w/w acetone, 35 to 15% w/w water and 0.7 to 0.3% w/w potassium hydroxide to an intermediate point in a reaction column, operating at elevated pressure, at such a rate as to maintain an acetone/water azeotrope reflux having a potassium hydroxide concentration in the range 300 to 1000 ppm within the reaction column, passing from the bottom of the column a fraction containing isophorone to a hydrolysis column also operating at elevated pressure wherein acetone is separated overhead and returned to the reaction column, removing the fraction containing water, isophorone and high-boiling compounds from the bottom of the hydrolysis column, and thereafter recovering the isophorone from the bottom fraction.