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:
Jan. 05, 1999
Filed:
Jul. 03, 1997
Applicant:
Inventors:
Makoto Ue, Ibaraki, JP;
Masayuki Takeda, Ibaraki, JP;
Takako Takahashi, Ibaraki, JP;
Masahiro Takehara, Ibaraki, JP;
Assignee:
Mitsubishi Chemical Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ; C07D / ; C07D / ;
U.S. Cl.
CPC ...
5483471 ; 5403351 ;
Abstract
An N-alkyl-N'-methylimidazolinium salt of an organic acid is prepared in high purity and in high yield by (a) preparing an N-alkyl-N'-methylimidazolinium methyl carbonate in a quaternization reaction by methylating an N-alkylimidazoline with dimethyl carbonate and (b) reacting the resulting N-alkyl-N'-methylimidazolinium methyl carbonate with an organic acid, in an anion exchange reaction, wherein the reaction of each step is conducted in methanol solvent.