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. 01, 2022
Filed:
Aug. 07, 2018
Nouryon Chemicals International B.v., Arnhem, NL;
Antoon Jacob Berend Ten Kate, Arnhem, NL;
Michiel Jozef Thomas Raaijmakers, Deventer, NL;
Karl Fredrik Lake, Södertälje, SE;
Eike Nicolas Kantzer, Uddevalla, SE;
Slavisa Jovic, Utrecht, NL;
Rolf Krister Edvinsson, Partille, SE;
Ina Ehlers, Stenungsund, SE;
Hendrik Van Dam, Ede, NL;
Rens Veneman, Amersfoort, NL;
NOURYON CHEMICALS INTERNATIONAL B.V., Arnhem, NL;
Abstract
The invention pertains to a process for converting a feedstock comprising cyclic alkyleneureas into their corresponding alkyleneamines, comprising —a CO2 removal step in which cyclic alkyleneureas are converted into their corresponding alkyleneamines by reacting cyclic alkyleneureas in the liquid phase with water with removal of CO2, —an amine removal step wherein cyclic alkyleneureas are converted in a reactive separation process into their corresponding alkyleneamines by reaction with an amine compound selected from the group of primary amines or secondary amines which have a higher boiling point than the alkyleneamines formed during the process. It has been found that the combination of a CO2 removal step and an amine removal step makes it possible to convert alkyleneureas into the corresponding amines in an efficient manner in a high reaction rate.