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. 19, 1985
Filed:
Jul. 16, 1984
Robert W Stackman, Morristown, NJ (US);
Richard H Summerville, deceased, late of W. Orange, NJ (US);
James E Summerville, Jr, heir, Signal Mountain, TN (US);
Celanese Corporation, New York, NY (US);
Abstract
The invention relates to the preparation of N-.alpha.-alkoxyethyl-carboxylic acid amides from dimethyl acetal and a carboxylic acid amide such as acetamide and to the preparation of secondary N-vinyl carboxylic acid amides such as N-vinyl acetamide therefrom. The reaction of dimethyl acetal and the carboxylic acid amide involves an equilibrium disproportionation wherein excess dimethyl acetal is used in sufficient amounts, e.g., in a molar ratio of from about 2 to 60:1 mole ratio, so as to force the equilibrium to the desired N-.alpha.-alkoxyethyl-carboxylic acid amide intermediate product. Equilibrium is reached in about 0.1 to 150 hours at a temperature about 0.degree. to 100.degree. C. The intermediate N-.alpha.-alkoxyethyl-carboxylic acid amide is pyrolyzed in accordance with a known pyrolysis reaction so as to obtain the corresponding N-vinyl acetamide.