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:
Mar. 09, 2010
Filed:
Mar. 19, 2007
Todd A. Werpy, W. Richland, WA (US);
John G. Frey, Jr., Richland, WA (US);
James F. White, Richland, WA (US);
Johnathan E. Holladay, Kennewick, WA (US);
Alan H. Zacher, Kennewick, WA (US);
Todd A. Werpy, W. Richland, WA (US);
John G. Frey, Jr., Richland, WA (US);
James F. White, Richland, WA (US);
Johnathan E. Holladay, Kennewick, WA (US);
Alan H. Zacher, Kennewick, WA (US);
Battelle Memorial Institute, Richland, WA (US);
Abstract
The invention includes methods of processing an initial di-carbonyl compound by conversion to a cyclic compound. The cyclic compound is reacted with an alkylating agent to form a derivative having an alkylated ring nitrogen. The invention encompasses a method of producing an N-alkyl product. Ammonia content of a solution is adjusted to produce a ratio of ammonia to di-carboxylate compound of from about 1:1 to about 1.5:1. An alkylating agent is added and the initial compound is alkylated and cyclized. The invention includes methods of making N-methyl pyrrolidinone (NMP). Aqueous ammonia and succinate is introduced into a vessel and ammonia is adjusted to provide a ratio of ammonia to succinate of less than 2:1. A methylating agent is reacted with succinate at a temperature of from greater than 100° C. to about 400° C. to produce N-methyl succinimide which is purified and hydrogenated to form NMP.