Method of Obtaining 60- to 70- Percent Nitric Acid

摘要

Object of the Invention: A method of obtaining 60- to 70-percent nitric acid through oxidation and absorption by water of nitrose gases obtained by the conversion of ammonia which is distinguished by the fact that for the purpose of intensification of the process and the obtaining of a high degree of utilization of the nitrogen involved, the nitrose gases are subjected to oxidation by the circulation of nitric acid and are directed for absorption by water into the upper part of an absorption column, while the remaining gas which contains nitrogen and nitrogen oxide is treated with a liquid absorbent, for example, the solution of FeS04, the solution obtained being subjected to heating, and the nitrogen oxide separated in this way oxidized by air and directed into the lower part of the absorption column for absorption of the nitric acid obtained in the upper part of the absorption column while the unabsorbed nitrogen oxides are directed into the nitrose gas after conversion of the ammonia. (Author)