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:
Feb. 28, 1995
Filed:
Mar. 02, 1994
Applicant:
Inventors:
Francis B Minnock, West Orange, NJ (US);
Paul D Taylor, Dublin, OH (US);
Assignee:
ISP Investments Inc., Wilmington, DE (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
548554 ; 548543 ;
Abstract
This invention relates to a liquid phase process for producing 2-pyrrolidone in high yield and selectivity in the absence of catalyst and extraneous solvents which involves contacting ammonia with butyrolactone in a molar ratio of from 0.5:1 to 0.85:1 at high temperature and pressure sufficient to maintain the liquid phase.