US 12,325,632 B2 · Production of carbon dioxide and ammonia from residual gases in the steel and metal industries

Abstract

The present invention relates to a process for the production of carbon dioxide and ammonia for the production of urea or ammonium carbamate from residual gases in the steel and metal industries, in particular basic oxygen furnace (BOF) gas and/or blast furnace (BF) gas. The process according to the invention comprises: (a) subjecting a mixture comprising (i) basic oxygen furnace gas and/or blast furnace gas and (ii) steam to a separation-enhanced water gas shift reaction to obtain a first product gas comprising H2 and N2 and a second product gas comprising CO2; (b) subjecting the first product gas originating from step (a) to NH3 synthesis to obtain a product gas comprising NH3; and (c) optionally subjecting at least part of the CO2 originating from step (a) and at least part of the NH3 originating from step (b) to the synthesis of urea or ammonium carbamate.

Claims14

Dependent claims

A process for the production of carbon dioxide and ammonia for the production of H2NC(O)X, wherein X=NH2 or O− NH4+, comprising:

(a) subjecting a mixture comprising (i) basic oxygen furnace gas and (ii) steam to a separation-enhanced water gas shift reaction to obtain a first product gas comprising H2 and N2 and a second product gas comprising CO2;
(b) subjecting the first product gas originating from step (a) to NH3 synthesis to obtain a product gas comprising NH3;
and
(c) optionally subjecting at least part of the CO2 originating from step (a) and at least part of the NH3 originating from step (b) to the synthesis of H2NC(O)X,
wherein the H2 to N2 ratio in the first product gas originating from step (a) is in a range of 2.5 to 3.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

17/264,343Filed 2 Aug 2019

Priority

EP 181870532 Aug 2018

Published

US 2021/0292163 A123 Sep 2021

Granted

10 Jun 2025

Term ends

Not estimatedThe source records don’t support an estimate.

Classification22 codes

C01B 3/025
Production of hydrogen; Production of gaseous mixtures containing hydrogen: preparation or purification of gas mixtures for ammonia synthesis
C01B 3/16
By reaction of water vapour with carbon monoxide: using catalysts
C01C 1/0488
From N2 and H2 in presence of a catalyst: processes integrated with preparations of other compounds, e.g. methanol, urea or with processes for…
C07C 273/10
Of urea, its salts, complexes or addition compounds: combined with the synthesis of ammonia

Production of carbon dioxide and ammonia from residual gases in the steel and metal industries

Life of this patent

Production of carbon dioxide and ammonia from residual gases in the steel and metal industries

Life of this patent

Abstract

Claims14