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:
Feb. 15, 2022
Filed:
Aug. 07, 2018
Nouryon Chemicals International B.v., Arnhem, NL;
Antoon Jacob Berend Ten Kate, Arnhem, NL;
Rens Veneman, Amersfoort, NL;
Hendrik Van Dam, Ede, NL;
Rolf Krister Edvinsson, Partille, SE;
Michiel Jozef Thomas Raaijmakers, Deventer, NL;
Eike Nicolas Kantzer, Uddevalla, SE;
Ina Ehlers, Stenungsund, SE;
Slavisa Jovic, Utrecht, NL;
Karl Fredrik Lake, Södertälje, SE;
Stig Mikael Wernersson, Södertälje, SE;
NOURYON CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Abstract
A process is provided for converting one or more cyclic ethylene ureas into corresponding ethylene amines and carbon dioxide. The process may include contacting water with one or more cyclic alkylene urea compounds comprising one or more cyclic alkylene urea moieties in a reaction vessel at a temperature of 150 to 400° C., optionally in the presence of an amine compound selected from the group of primary amines, cyclic secondary amines and bicyclic tertiary amines. The mole ratio of water to cyclic alkylene urea moieties is in the range of from about 0.1 to about 20. In the reaction, at least a portion of the cyclic alkylene urea moieties are converted to corresponding alkylenediamine moieties and carbon dioxide. The process may further include removing the carbon dioxide from the liquid reaction mixture in a stripping vessel by feeding a stripping fluid to the stripping vessel. Further, the process may include removing a carbon dioxide-containing stripping fluid.