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:
Aug. 06, 2013
Filed:
Jul. 27, 2011
Seiji Bando, Hyogo, JP;
Takeshi Fujiwara, Hyogo, JP;
Hiroyuki Shiraishi, Hyogo, JP;
Takehiro Hiyama, Hyogo, JP;
Seiji Bando, Hyogo, JP;
Takeshi Fujiwara, Hyogo, JP;
Hiroyuki Shiraishi, Hyogo, JP;
Takehiro Hiyama, Hyogo, JP;
Sumitomo Seika Chemicals Co., Ltd., Kako-gun, Hyogo, JP;
Abstract
The present invention provides a method for producing a methylene disulfonate compound including reacting, in the presence of an acid and a dehydrating agent, a formaldehyde compound with at least one salt of alkanedisulfonic acid selected from the group consisting of alkali metal salts of alkanedisulfonic acid and alkaline earth metal salts of alkanedisulfonic acid each represented by a specific formula. According to the method of the present invention, a methylene disulfonate compound can be obtained in a simple manner at low cost.