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:
Feb. 29, 2000
Filed:
Oct. 02, 1998
Satoshi Morioka, Yokohama, JP;
Takahiro Abe, Tokyo, JP;
Toshihiro Maeda, Sendai, JP;
Arihiro Taki, Omiya, JP;
Katsuhiko Sawada, Tokyo, JP;
Hiroaki Ishitsuka, Mohka, JP;
Mitsubishi Chemical Corporation, , JP;
Nikken Chemicals Co., Ltd., , JP;
Abstract
A process for producing a high-purity erythritol crystal comprising a crystallization step of subjecting an erythritol-containing aqueous solution as a raw solution to crystallization, wherein an erythritol concentration of said erythritol-containing aqueous solution is adjusted to 30 to 60% by weight at the beginning of the crystallization step; said erythritol-containing aqueous solution is cooled at a cooling rate of not more than 20.degree. C./hour; a seed crystal of erythritol is added to said erythritol-containing aqueous solution in the course of the cooling, and the solution is cooled to not more than 20.degree. C. Such a process for producing a high-purity erythritol crystal of the present invention has a still higher purity and is further improved in crystal shape as compared to those produced by conventional processes.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile