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:
Nov. 24, 1998
Filed:
Mar. 27, 1997
Samuel Livingston Lane, Beaumont, TX (US);
E. I. du Pont de Nemours and Company, Wilmington, DE (US);
DSM N.V., Galeen, NL;
Abstract
An improved method for the selective oxidation of alkyl-5-valerate to monomethyl adipate (e.g., methyl-5-valerate to monomethyl adipate). By performing the air oxidation at high pressure (i.e.,>10 bars air and preferably 35 to 65 bars) and relatively moderate temperature (i.e., 20 to 120.degree. C.) in the absence of a catalyst, commercial rates of conversion can be sustained at optimum selectivity to the desired product. Such a high pressure process is particularly amenable to continuous operating the oxidation reactor at optimum selectivity at the expense of conversion per pass followed by product separation and recycle of reactants.