METHOD OF PRODUCING AMMONIA FROM NATURAL GAS Russian patent published in 2024 - IPC C01C1/04 C01B3/02 

FIELD: chemistry.

SUBSTANCE: invention relates to the production of ammonia from natural gas and air and can be used in enterprises of the gas chemical industry. The initial natural gas is purified from sulfur-containing impurities, heated and subjected to primary and secondary reforming with subsequent conversion of carbon monoxide into carbon dioxide, the resulting synthesis gas is purified from carbon dioxide, methanated, adsorption drying and low-temperature rectification of synthesis gas, ammonia synthesis, liquefied ammonia is obtained, while desulfurization is provided by catalytic hydrotreating and chemical by adsorption of hydrogen sulfide, heating of technological media – a mixture of initial natural gas with hydrogen, a mixture of natural gas and water vapor, process air, overheating of high–pressure steam - is carried out by differential cooling of flue gases of the primary reforming furnace; high-pressure steam generation is carried out by heat synthesis gas of secondary reforming; the technological line of the produced synthesis gas between the stage of methanation of synthesis gas and the stage of synthesis and condensation of ammonia is supplemented by the stages of adsorption drying and low-temperature rectification of synthesis gas, and the stage of synthesis and condensation of ammonia provides the production of liquefied ammonia; flue gases of the primary reforming furnace are selectively purified from nitrogen oxides using catalysts based on vanadium, titanium, tungsten or aluminum oxides; at the same time, the production line is duplicated by a similar second production line and both production lines are connected by direct and reverse flows with general-purpose facilities.

EFFECT: technical result is a reduction in the consumption of fuel natural gas due to the redistribution of internal energy-saturated flows in the ammonia production system, a reduction in the environmental burden of the external environment and a reduction in the risks of an emergency shutdown of ammonia production.

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