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. 12, 1993
Filed:
Jun. 21, 1990
Takashi Hori, Saitama, JP;
Sanae Ueda, Saitama, JP;
Yoshihiro Kojima, Ibaragi, JP;
Masato Goto, Saitama, JP;
Hitoshi Kumagai, Saitama, JP;
Cosmo Oil Co., Ltd., Tokyo, JP;
Cosmo Research Institute, Tokyo, JP;
Abstract
A process for producing an over-based sulfurized alkaline earth metal phenate type detergent, which comprises reacting a phenol and a dihydric alcohol with an alkaline earth metal reagent to carry out a metal addition reaction, and reacting sulfur therewith to carry out a sulfurization reaction, and then reacting carbon dioxide therewith to carry out a carbon dioxide treatment, characterized in that the metal addition reaction and the sulfurization reaction are carried out under pressure and closed conditions. The sulfurization reaction may be carried out simultaneously with the metal addition reaction, or, alternatively, with the carbon dioxide treatment after the metal addition reaction. Furthermore, the sulfurization reaction may be carried out between the metal addition reaction and the carbon dioxide treatment.