METHOD OF THE SYNTHESIS OF AMMONIA FROM THE NITROGEN AND HYDROGEN MIXTURE PRODUCED FROM THE NATURAL GAS Russian patent published in 2006 - IPC C01C1/04 C01B3/02 

FIELD: petrochemical industry; methods of the synthesis of ammonia from the nitrogen and hydrogen mixture produced from the natural gases.

SUBSTANCE: the invention is pertaining to the field of petrochemical industry, in particular, to the method of the synthesis of ammonia from the nitrogen and hydrogen mixture produced from the natural gases. The method of the catalytic synthesis of ammonia from the mixture of nitrogen and hydrogen provides, that the natural gas together with the oxygen-enriched gas containing at least 70 % of oxygen is subjected to the autothermal reforming at temperature from 900 up to 1200°C and the pressure from 40 up to 100 bar at the presence of the catalyzer of cracking, producing the unstripped synthesis gas containing in terms of the dry state 55-75 vol.% of H₂, 15-30 vol.% of C and 5-30 vol.% CO₂. At that the volumetric ratio _of H₂: CO makes from 1.6 : 1 up to 4 : 1. The unstripped synthesis gas is removed from the furnace of the autothermal reforming, cooled and subjected to the catalytic conversion producing the converted synthesis gas containing in terms of the dry state at least 55 vol.% of H₂ and no more than 8 vol.% of CO. The converted synthesis gas is subjected to the multistage treatment for extraction of_{CO2, CO and CH4. At that they realize the contact of the synthesis gas with the liquid nitrogen and using at least one stage of the absorption treatment produce the mixture of nitrogen and hydrogen, which is routed to the catalytic synthesizing of ammonia. At that at least a part of the synthesized ammonia may be transformed into carbamide by interaction with carbon dioxide. The realization of the method allows to solve the problem of the ammonia synthesis efficiency.}

EFFECT: the invention ensures solution of the problem of the ammonia synthesis efficiency.

8 cl, 1 ex, 2 tbl, 2 dwg