Patent · US Active

Ammonia-urea integrated process and plant

US11236043B2 · kind B2 · utility

0Cited by
6References
9Claims
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Assignee

Inventors

Key dates

Filing dateFeb 1, 2018
Grant dateFeb 1, 2022
Priority date—
Expiry dateFeb 1, 2038

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02P20/52
  • WIPO fieldChemical engineering
  • WIPO sectorChemistry

Abstract

A process for the production of ammonia and urea in an ammonia-urea integrated plant comprising an ammonia section and a tied-in urea section, wherein a hydrocarbon is reformed to produce ammonia make-up synthesis gas; said make-up gas is purified by shift conversion and removal of carbon dioxide; carbon dioxide is removed from the make-up gas by a first and a second CO2 removal sections; the first section removes CO2 by absorption with a suitable medium, and the second section removes CO2 by washing with a carbamate solution taken from the urea section; the make-up gas is reacted to produce ammonia; the CO2 removed from the make-up gas and at least part of the ammonia are used to produce urea.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.