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:
Mar. 25, 2025
Filed:
Aug. 07, 2018
Nouryon Chemicals International B.v., Arnhem, NL;
Rens Veneman, Amersfoort, NL;
Antoon Jacob Berend Ten Kate, Arnhem, NL;
Karl Fredrik Lake, Södertälje, SE;
Jenny Valborg Therese Adrian Meredith, Årsta, SE;
Michiel Jozef Thomas Raaijmakers, Deventer, NL;
Slavisa Jovic, Utrecht, NL;
Rolf Krister Edvinsson, Partille, SE;
Hendrik Van Dam, Ede, NL;
Eike Nicolas Kantzer, Uddevalla, SE;
Ina Ehlers, Stenungsund, SE;
NOURYON CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Abstract
A process is provided for manufacturing a cyclic urea adduct of an ethyleneamine compound, the ethyleneamine compound having a linear —NH—CH—CH—NH— group. The process includes, in an absorption step, contacting a liquid medium comprising an ethyleneamine compound having a linear —NH—CH—CH—NH— group with a CO-containing gas stream at a pressure of from about 1 to about 20 bara, resulting in the formation of a liquid medium into which COhas been absorbed. The process further includes bringing the liquid medium to cyclic urea formation conditions, and, in an urea formation step, forming cyclic urea adduct of the ethyleneamine compound, urea formation conditions including a temperature of at least about 120° C., wherein the total pressure at the end of the urea formation step is at most about 20 bara, and wherein the temperature in the absorption step is lower than the temperature in the urea formation step.