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. 10, 1999
Filed:
Dec. 02, 1996
Hiroshi Umino, Yokohama, JP;
Hiromitsu Shibuya, Yokohama, JP;
Nobuyasu Chikamatsu, Yokohama, JP;
Kazuo Kikuchi, Yokohama, JP;
Masahiko Yamagishi, Yokkaichi, JP;
Kiyoshi Takahashi, Yokkaichi, JP;
JGC Corporation, Tokyo, JP;
Mitsubishi Chemical Corporation, Tokyo, JP;
Abstract
In a crystallization method, a liquid mixture containing a crystallizable component is cooled so as to form and separate crystals of the crystallizable component. Then, a purified melt having purity substantially equal to that of the separated crystals, to which a polymerization inhibitor is added and which is heated to a temperature higher than a freezing point of the separated crystals, is circulated to flow contacting the crystals so as to accelerate melting. Then, the melted crystals are recovered along with the purified melt containing the polymerization inhibitor.