Improvements in process and apparatus for synthesizing ammonia

摘要

186,912. Nitrogen Corporation, (Assignees of Arnold, E. H., and Wakeford, W. T.). Oct. 5,1921, [Convention date]. Concentric straight-tube apparatus. -The whole of the circulatory system employed in conjunction with an apparatus for the synthesis of ammonia is constituted of unobstructed passages having substantially uniform cross-sectional area.. The system comprises a heat-exchanger 5, consisting of a series of uhits 6, formed of two concentric tubes 9, 10 and surrounded by insulating material 8; a pre-heater 15, comprising a nest of concentric tubes with a central electric heating element 32; a pump, a liquefier, and interconnecting pipes. The reaction gases under a pressure of about 100 atmospheres are forced with the pipe 4, then passed through the central tubes 9 of the heat-exchanger 5 where they receive heat from the outgoing gases, and before entry into the synthesizer are further heated by traversing the passages of the preheater 15; the hot exit gases from the synthesizer are conducted through the outer tubes 10 of the heat-exchanger 5, thence to a liquefier and are finally reintroduced into the circuit at point 3. Reference has been directed by the Comptroller to Specifications 19902/01, [Class 1, Acids, adkalies, &c.], 17951/09, [Class 1 (i), Chemical processes &c.], 124,762, and 142,522.