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. 28, 1982
Filed:
Jan. 29, 1980
Taira Fujita, Nishinomiya, JP;
Hiroyuki Nakagawa, Kawanishi, JP;
Mikio Sugihara, Takatsuki, JP;
Kimiyuki Kobayashi, Minoo, JP;
Katuhiko Okamoto, Kyoto, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
A compound having at least one --SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 M group in the molecule, wherein M is hydrogen or an alkali metal, which is useful as a reactive dye for dying cellulose fiber materials or as an intermediate for production of said reactive dye, is industrially advantageously produced in a high yield and a high quality by esterification of a compound having at least one --SO.sub.2 CH.sub.2 CH.sub.2 OH in the molecule using a sulfuric acid-esterifying agent in the presence of a water-insoluble organic solvent and a secondary or tertiary amine.