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. 16, 2011
Filed:
Mar. 02, 2004
Hiroto Kikuchi, Hokkaido, JP;
Hiroaki Sakurai, Hokkaido, JP;
Norimitsu Takagi, Hokkaido, JP;
Tsutomu Aritsuka, Hokkaido, JP;
Yoshihiro Senba, Hokkaido, JP;
Fusao Tomita, Hokkaido, JP;
Kozo Asano, Hokkaido, JP;
Hiroto Kikuchi, Hokkaido, JP;
Hiroaki Sakurai, Hokkaido, JP;
Norimitsu Takagi, Hokkaido, JP;
Tsutomu Aritsuka, Hokkaido, JP;
Yoshihiro Senba, Hokkaido, JP;
Fusao Tomita, Hokkaido, JP;
Kozo Asano, Hokkaido, JP;
Nippon Beet Sugar Mfg., Co., Ltd., Tokyo, JP;
Abstract
In the invention, highly pure crystals of difructose dianhydride III (di-D-fructofuranose-1,2':2,3′-dianhydride; hereinafter referred to as DFA III) are produced by adding 5% or less of powdered active carbon to a DFA III containing purified solution containing DFA III of 90% or more purity at a concentration of R-Bx 10-60, preferably 40-55, and after stirring, applying the mixture to solid-liquid separation (filtration with diatomaceous, filtration through a membrane filter, ultrafiltration, or continuous centrifugal separation) and concentrating the separated liquid part, followed by immediate crystallization. In the process of the invention, DFA III crystals can be produced efficiently and industrially, and the resulting crystals can be used for various purposes in pharmaceuticals or food and drink since they have no smell. This is characteristics of the invention different from the prior art products.