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:
Sep. 11, 2012
Filed:
Aug. 29, 2007
Masateru Yasumura, Tsukuba, JP;
Yoshikazu Aoki, Koriyama, JP;
Masami Ito, Tsukuba, JP;
Masafumi Umekawa, Motomiya, JP;
Naohiro Tarumoto, Tokyo, JP;
Masateru Yasumura, Tsukuba, JP;
Yoshikazu Aoki, Koriyama, JP;
Masami Ito, Tsukuba, JP;
Masafumi Umekawa, Motomiya, JP;
Naohiro Tarumoto, Tokyo, JP;
Hodogaya Chemical Co., Ltd., Tokyo, JP;
Abstract
The object of the present invention is, in methods for producing cyclic phenol sulfides, to provide methods for producing a number of more macrocyclic products, which comprise the steps of producing a mixture of cyclic phenol sulfides from an inexpensive raw material in one step without inducing the reduction in yield of a cyclic quatromer; and easily separating and purifying a single component from the mixture of cyclic phenol sulfides. The present invention discloses methods for producing a cyclic phenol sulfide which comprises the step of reacting a phenol compound as a raw material, in a one-step reaction, with 1.7 to 2.5 molar equivalent of sulfur and 0.25 to 0.75 molar equivalent of an alkali metal reagent per 1 mol of the phenol compound to obtain a mixture of cyclic phenol sulfide wherein m=4 and at least one kind(s) of cyclic phenol sulfide wherein m=5 to 9, or each separate cyclic phenol sulfide comprised in the mixture.