Patent · US Active

Method for producing ammonia and urea in a common facility

US11084731B2 · kind B2 · utility

0Cited by

6References

4Claims

0Family size

Assignees

THYSSENKRUPP INDUSTRIAL SOLUTIONS AG · DE
thyssenkrupp AG · DE

Inventors

Joachim Johanning · Oberhausen, DE
Yevgeny MAKHYNYA · Mülheim, DE

Key dates

Filing date	Nov 13, 2017
Grant date	Aug 10, 2021
Priority date	—
Expiry date	Jul 3, 2038

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/52
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for preparing ammonia or ammonia and urea in a facility may involve compressing a crude synthesis gas stream that includes hydrogen, nitrogen, and carbon dioxide, washing a substream of the crude synthesis gas with ammonia to form a purified synthesis gas stream depleted of carbon dioxide and a condensate, synthesizing ammonia from the purified synthesis gas stream, and synthesizing urea from the condensate to form an aqueous urea composition. In the preparation of ammonia and urea, the crude synthesis gas stream may be, after being compressed, divided into a first synthesis gas substream and a second synthesis gas substream. In some instances, only the first synthesis gas substream is scrubbed with liquid ammonia.

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