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:
Mar. 01, 2005
Filed:
Dec. 27, 2001
Katsuhiko Matsuba, Sodegaura, JP;
Takazou Katou, Sodegaura, JP;
Satoshi Inoki, Yamaguchi, JP;
Hiroyoshi Watanabe, Sodegaura, JP;
Takashi Ohkawa, Takaishi, JP;
Masato Yamazaki, Takaishi, JP;
Michio Iwama, Sodegaura, JP;
Katsuhiko Matsuba, Sodegaura, JP;
Takazou Katou, Sodegaura, JP;
Satoshi Inoki, Yamaguchi, JP;
Hiroyoshi Watanabe, Sodegaura, JP;
Takashi Ohkawa, Takaishi, JP;
Masato Yamazaki, Takaishi, JP;
Michio Iwama, Sodegaura, JP;
Mitsui Chemicals, Inc., Tokyo, JP;
Abstract
There is provided a process for preparing a 1,3-dialkyl-2-imidazolidinone by using an alkylene oxide as a first component, using at least one of (A) carbon dioxide and a monoalkylamine; (B) a carbon dioxide compound of the monoalkylamine; and (C) an 1,3-dialkylurea, reacting the first and second components by heating at 50° C. or higher to give 1,3-dialkyl-2-imidazolidinone, characterized in that the total molar amount of a molar feed amount of the monoalkylamine included in the component (A), a molar feed amount of the monoalkylamine part of the carbon dioxide compound of monoalkylamine, component (B), and the double of a molar feed amount of the 1,3-dialkylurea, component (C), is at least three folds of a molar feed amount of the alkylene oxide. The preparation process of this invention uses an industrially readily available alkylene oxide as a starting material and can be suitably conducted with a higher yield in an industrial scale.