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filingDate 1994-04-15-04:00^^<http://www.w3.org/2001/XMLSchema#date>
grantDate 1995-02-28-04:00^^<http://www.w3.org/2001/XMLSchema#date>
inventor http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_3209d95d1fdbf6b9c05ee1e38eda52b4
http://rdf.ncbi.nlm.nih.gov/pubchem/patentinventor/MD5_267bd59eec34483a7dc27ed167f70cac
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publicationDate 1995-02-28-04:00^^<http://www.w3.org/2001/XMLSchema#date>
publicationNumber US-5393901-A
titleOfInvention Aqueous process for preparing amido-carboxylic acids
abstract This invention relates to a process for preparing amido-carboxylic acids in water wherein hydrolysis and amidation reactions are conducted simultaneously in a single vessel. The process involves three steps. The first step involves heating at a temperature of 150 DEG C.-300 DEG C. for 2 to 10 hours, a mixture containing water, a nitrogen containing compound selected from the group consisting of a lactam and an amino acid, and a carboxylic acid or ester. The second step involves cooling the reaction mixture to obtain a two phase system containing an aqueous layer and an organic layer. The third step 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.
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