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:
Jun. 23, 2015
Filed:
Sep. 17, 2014
Applicant:
Far Eastern New Century Corporation, Taipei, TW;
Inventors:
Guei-San Chen, Taipei, TW;
Fa-Chen Chi, Taipei, TW;
Cheng-Han Chou, Taipei, TW;
Xin-An Lu, Taipei, TW;
Assignee:
Far Eastern New Century Corporation, Taipei, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 51/353 (2006.01); C07C 51/16 (2006.01);
U.S. Cl.
CPC ...
C07C 51/353 (2013.01); C07C 51/16 (2013.01);
Abstract
A method for producing terephthalic acid comprises the steps of: subjecting methyl acrylate to contact with aluminum chloride so as to form a complex; adding isoprene to the complex to result in a Diels-Alder reaction which is kept at a temperature no higher than 50° C. by cooling so as to obtain a cyclic adduct product; subjecting the cyclic adduct product to separation so as to obtain a cyclic para-precursor; and subjecting the cyclic para-precursor to a chemical reaction so as to obtain terephthalic acid.