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:
May. 04, 1993
Filed:
Jan. 29, 1992
Applicant:
Inventors:
Edmund F Perozzi, Crestwood, MO (US);
John F Sieberth, Baton Rouge, LA (US);
Assignee:
Ethyl Petroleum Additives, Inc., St. Louis, MO (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
568 22 ; 568 21 ; 208226 ; 208230 ; 208231 ;
Abstract
The copper corrosiveness of organic sulfides is reduced by treating them with an alkali metal-containing or alkaline earth metal-containing substance capable of dissolving elemental sulfur (e.g., sodium hydroxide, sodium sulfide, etc.). The process is conducted in the presence of a phase transfer catalyst in an aqueous liquid reaction medium. Experiments have shown that it is possible by use of this process to reduce the copper corrosiveness to a level below that exhibited by a product formed by treating the same initial organic sulfide in the same way but in the absence of a phase transfer catalyst.