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:
Dec. 11, 1979
Filed:
Dec. 12, 1978
Applicant:
Inventors:
Roberto Mattone, Frascati, IT;
Mario Catoni, Colleferro, IT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2602 / ;
Abstract
There is described a process for the purification of caprolactam from the idable impurities present therein, by means of a treatment with an oxidizing agent consisting of ozone, the process comprising the steps of dissolving the polluted caprolactam into a solvent inert to ozone, such as water, and of causing the ozone to bubble through the resulting solution, the concentration of the caprolactam in the solution being preferably comprised between about 40% and 78% by weight of caprolactam, and the treatment being preferably effected at a temperature between the freezing temperature of the solution and 70.degree. C.