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:
Feb. 12, 1991
Filed:
Aug. 02, 1989
Yoshimi Shiroto, Yokohama, JP;
Mitsunori Shimura, Yokohama, JP;
Kenji Shimokawa, Yokohama, JP;
Yoshio Fukui, Tokyo, JP;
Yakudo Tachibana, Kasukabe, JP;
Kazuhiko Tate, Yokohama, JP;
Hiroaki Taniguchi, Kuki, JP;
Chiyoda Corporation, both of, JP;
NKK Corporation, both of, JP;
Abstract
A method of separating 2,6-diisopropylnaphthalene from a mixture containing 2,6-diisopropylnaphthalene and structural isomers thereof including the 2,7-isomer is disclosed, wherein the mixture is first subjected to a selective adsorption and desorption treatment using a zeolite absorbent capable of adsorbing the 2,7-isomer to obtain a first extract containing the sorbed 2,7-isomer and a first raffinate containing non-sorbed isomers including the 2,6-isomer, the 2,6-isomer being thereafter separated from the first raffinate.