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. 03, 2014
Filed:
Jun. 14, 2007
Kuniaki Okamoto, Kawagoe, JP;
Tsutomu Watahiki, Kawagoe, JP;
Motoshige Sumino, Kawagoe, JP;
Wako Pure Chemical Industries, Ltd., Osaka, JP;
Abstract
It is an object of the present invention to provide a commercially advantageous method for producing a cyclic disulfonic acid ester with high yield, the present invention discloses a method for producing a cyclic disulfonic acid ester represented by the general formula (3), which comprises reacting a silver alkanedisulfonate represented by the general formula (1) with a dihaloalkane represented by the general formula (2) in a nonpolar solvent. Wherein Xand Xare each independently a chlorine atom, a bromine atom or an iodine atom; and Y and Z are each independently a substituted or unsubstituted alkylene chain which may have a heteroatom in the chain.