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:
Sep. 29, 1981
Filed:
Oct. 30, 1980
Applicant:
Inventor:
Ellis B Rifkin, Southfield, MI (US);
Assignee:
Ethyl Corporation, Richmond, VA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; C07F / ;
U.S. Cl.
CPC ...
203-6 ; 203 60 ; 260990 ;
Abstract
Deposit formation in distillation units, particularly column reboiler units, associated with the separation and purification of dialkyl phosphorochloridothioates from a crude material containing oxygenated compound impurities, is inhibited by incorporating in the feed stock a minor proportion (generally about 0.05 to about 15.0 weight percent) of an acylated amine prepared by reacting a hydrocarbon-substituted succinic compound with an alkylene amine or a hydroxyalkyl-substituted alkylene amine.