for a urea synthesis process
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United States of America
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Dec 11, 2014
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Dec 11, 2014
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Abstract
The invention relates to a process for preparing ammonia gas and CO2 for urea synthesis. In the process of the invention, a process gas containing nitrogen, hydrogen and carbon dioxide as main components is produced from a metallurgical gas. The metallurgical gas consists of blast furnace gas, or contains blast furnace gas at least as a mixing component. The process gas is fractionated to give a gas stream containing the CO2 component and a gas mixture consisting primarily of N2 and H2. An ammonia gas suitable for the urea synthesis is produced from the gas mixture by means of ammonia synthesis. CO2 is branched off from the CO2-containing gas stream in a purity and amount suitable for the urea synthesis.
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