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. 29, 1983
Filed:
Aug. 14, 1981
Mario De Gaetano, Cesano Maderno, IT;
Luigi Canavesi, Solbiate Olona, IT;
Abstract
A process for recovering omega-amino-dodecanoic acid by separating the byoducts from the crude acid that comprises, in the sequence indicated (a) treating the crude acid in the presence of water with an acid (A) in such an amount as to obtain an acid (A)/amino acid molar ratio comprised of between 2:1 and 1:1, the amount of water being such as to dissolve at least part of the salt obtained and not to dissolve at least part of the by-products, (b) separating the phases into one containing most of the salt and another containing most of the by-products, (c) decomposing the salt by treatment with an organic or inorganic base (B) and isolating the amino acid in the free state.