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. 21, 1995
Filed:
Apr. 15, 1994
George C Zima, Kingsport, TN (US);
T Hugh Williams, Fall Branch, TN (US);
Eastman Chemical Company, Kingsport, TN (US);
Abstract
This invention relates to a process for preparing amido-carboxylic acids in water. The process involves four steps. Step (A) involves hydrolyzing a lactam at a temperature of 150.degree. C.-300.degree. C. to form a mixture containing an amino acid. Step (B) involves cooling the reaction mixture formed in Step (A) to a temperature of 25.degree. C.-100.degree. C. Step (C) involves reacting a carboxylic acid anhydride with the amino acid formed in Step (A) to form a reaction mixture containing an organic layer which contains an amido-carboxylic acid and an aqueous layer. Step (D) involves separating the amido-carboxylic acid containing organic layer from the aqueous layer. The presence of water aids in product isolation by phase separation and recycle of the reactants. Amido-carboxylic acids are used to make bleach activators for detergents.