Synthesis of ammonia with internal cooling circuit

A method for the synthesis of ammonia, comprising:

• compressing a fresh gas containing hydrogen and nitrogen via a compressor and subsequently feeding the fresh gas to an ammonia converter for conversion into a converter product containing ammonia, hydrogen, and nitrogen,
• upstream of the fresh-gas compressor, evaporating ammonia into the fresh gas in order to cool the fresh gas and to produce a substance mixture comprising ammonia and the fresh gas,
• heating said substance mixture in a circuit cooler against at least one process stream to be cooled, and subsequently compressing the substance mixture via the compressor to obtain a compressed substance mixture comprising ammonia and the fresh gas, and
• upstream of the circuit cooler, feeding a gas mixture containing hydrogen and nitrogen to the fresh gas or to the cold substance stream formed from admixing the fresh gas and the liquid ammonia, wherein the constituents of said gas mixture are separated from the converter product and/or separated from the compressed substance mixture comprising ammonia and the fresh gas.