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:
Jan. 05, 2010
Filed:
Jul. 01, 2004
Takafumi Yoshimura, Niigata, JP;
Toshio Hidaka, Ibaraki, JP;
Yoshifumi Sato, Niigata, JP;
Norio Fushimi, Okayama, JP;
Kazuhiro Yamada, Aichi, JP;
Takafumi Yoshimura, Niigata, JP;
Toshio Hidaka, Ibaraki, JP;
Yoshifumi Sato, Niigata, JP;
Norio Fushimi, Okayama, JP;
Kazuhiro Yamada, Aichi, JP;
Mitsubishi Gas Chemical Company, Inc., Tokyo, JP;
Abstract
The present invention provides a process for producing 5-iodo-2-methylbenzoic acid through iodination of 2-methylbenzoic acid, the process including, as essential steps, a reaction step of iodinating 2-methylbenzoic acid in the presence of a microporous compound, iodine, an oxidizing agent, and acetic anhydride, and a purification step including sublimation, distillation, crystallization, or a combination of two or more of these. According to the present invention, 5-iodo-2-methylbenzoic acid, which is useful for producing functional chemicals such as drugs, can be produced at high purity and high yield in a simple manner. Since the production process includes a simple reaction step and a simple separation/purification step, the load of purification is mitigated. In addition, the microporous compound such as a zeolite catalyst which has been separated and recovered from the reaction mixture can be repeatedly employed after performing of a simple treatment. Thus, the production process ensures a long service life of catalysts and high efficiency.