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:
Oct. 19, 1982
Filed:
Feb. 27, 1981
Applicant:
Inventors:
Stephen B Willis, Jr, Lake Jackson, TX (US);
Joseph D Henry, Lake Jackson, TX (US);
Assignee:
The Dow Chemical Company, Midland, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ; C07C / ;
U.S. Cl.
CPC ...
564477 ; 564475 ; 564476 ;
Abstract
In a process of making ethanolamines by reacting ethylene and ammonia and wherein ammonia is used in excess of the stoichiometric amount, the improvement comprising flashing and liquification at least part of the excess ammonia in the effluent prior to recycling. This moderates the operating conditions and simplifies the equipment needed to recycle the balance of the ammonia.