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:
Jun. 08, 2021
Filed:
Mar. 07, 2018
Haldor Topsøe A/s, Kgs. Lyngby, DK;
Christian Henrik Speth, Lynge, DK;
Per Juul Dahl, Vedbæk, DK;
Annette E. Kroll Jensen, Fredensborg, DK;
Niels Christian Schjødt, Hvalsø, DK;
Marcus Symreng, Malmö, SE;
Haldor Topsoe A/S, Lyngby, DK;
Abstract
A process for producing urea with controlled excess of COand/or NH. The process includes the steps of: reforming the hydrocarbon feed gas, thereby obtaining a synthesis gas comprising CH, CO, CO, Hand HO, shifting the synthesis gas, removing COfrom the synthesis gas, removing residual HO and/or COfrom the synthesis gas, removing CH, CO, Ar and/or He, and adding stoichiometric nitrogen to produce NHto the synthesis gas, synthesizing NHto obtain a NHproduct, and adding at least part of the product COand at least part of the NHproduct to a urea synthesis step to make a urea product. The amount of excess COand/or NHis controlled by adjusting the steam/carbon in the reforming step and/or the HO addition upstream the shift step and/or adjusting the inlet temperature to at least one or more shift steps.