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. 02, 1999
Filed:
Jul. 02, 1997
Applicant:
Inventors:
Shiao-Jung Chu, Hsinchu, TW;
Hsi-Yen Hsu, Taipei, TW;
Ching-Tang Lin, Hsinchu, TW;
Kwang-Chic Lai, Chang-Hua, TW;
J H Tsai, Chang-Hua, TW;
Assignees:
Industrial Technology Research Institute, Hsinchu, TW;
Acelon Chemicals & Fiber Corporation, Chang-Hua, TW;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
540538 ;
Abstract
A simple and single step process for producing caprolactam comprising reacting 5-formylvaleric acid or an ester thereof in a solvent of water and/or an alcohol with hydrogen and ammonia in the presence of a noble metal catalyst supported by a carrier at 80.degree. to 300.degree. C. under a pressure of 10 to 120 atm, whereby amination, acidification, dehydration and cyclization occur to obtain caprolactam.