Abstract: The invention relates to a method for the synthesis of ammonia, in which a fresh gas consisting largely of hydrogen and nitrogen is compressed via a compressor and subsequently fed to an ammonia converter for conversion into a converter product containing ammonia and comprising hydrogen and nitrogen. Upstream of the compressor, ammonia is evaporated into the fresh gas in order to cool the fresh gas and to produce a cold substance mixture comprising ammonia and the fresh gas. The substance mixture is heated in a heat exchanger against at least one process stream to be cooled, and subsequently compressed via the compressor, to obtain a compressed substance mixture comprising ammonia and the fresh gas. Upstream of the circuit cooler, a gas mixture consisting largely of hydrogen and nitrogen is fed to a substance stream comprising the fresh gas. The constituents of the gas mixture are separated from the converter product and/or from the compressed substance mixture comprising ammonia and the fresh gas.

Abstract: An plant unit for fractionating and purifying synthesis gas is described, which is comprised of a device for partially condensing synthesis gas and a device for nitrogen washing, whereat the device for nitrogen washing is adjacent to the device for partial condensation.

Abstract: A purifier process, includes supplying a first stream of a feed gas containing hydrogen and nitrogen in a MOL ratio of about 2/1, and also containing methane, and argon, then cryogenically separating the feed gas into the following: a) a second stream of a synthesis gas containing hydrogen and nitrogen in a MOL ratio of about 3/1, b) waste gas containing principally nitrogen, and also containing substantially all of the methane supplied in the first stream, and splitting the waste gas into: c) a third stream of nitrogen rich gas d) a fourth stream of methane rich gas useful as a fuel, or as a feed to a subsequent process.

Abstract: A process and plant for the combined production of carbon monoxide and an ammonia synthesis from a feed gas mixture containing essentially hydrogen, carbon monoxide and other constituents including methane. The process comprises subjecting the feed gas mixture at high pressure to partial condensation through a heat exchanger followed by separation to produce an impure hydrogen flow and a condensed fraction rich in carbon monoxide. The carbon monoxide is cryogenically purified from the condensed fraction by separation and removal of dissolved hydrogen. The hydrogen is sent to a washing column, and is then cryogenically purified by washing with nitrogen in the washing column while drawing off a liquid fraction rich in carbon monoxide at the base of the washing column. An ammonia synthesis mixture is produced by adding a nitrogen supplement taken from a high-pressure nitrogen stream, and from the hydrogen flow produced at the head of the washing column.

Abstract: A process for producing ammonia synthesis gas and recovering argon in conjunction with a low-purity oxygen separating unit.