Nitric acid Sabar process

CNA [Concentrated nitric acid] A general name for processes that make nitric acid more concentrated than the 70 percent made in conventional plants. They include the CONIA and SABAR processes. See also DSN. [Pg.67]

SABAR [Strong acid by azeotropic rectification] A process for making nitric acid by the atmospheric oxidation of ammonia. The nitrous gases from the oxidation are absorbed in azeotropic nitric acid in the presence of oxygen under pressure ... [Pg.232]

As mentioned earlier in this chapter, the SABAR process absorbs nitrous gases in azeotropic nitric acid in the presence of oxygen and then makes strong acid by azeotropic rectification. Some of the key reactions in this process are illustrated by Eq. (9.15) and Eq. (9.16). [Pg.233]

The SABAR (Strong Acid By Azeotropic Rectification) process makes nitric acid by the atmospheric oxidation of ammonia. Davy McKee developed the process and built plants based on this technology from 1974 to 1986. [Pg.1036]

In Davy McKee s Sabar process (Strong Acid By Azeotropic Rectification) the nitrous gases from the oxidation of nitrogen(ll) oxide are absorbed in azeotropic (ca. 68 to 69%) nitric acid in the presence of atmospheric oxygen (at 6 to 13 bar) and superazeotropic acid is formed ... [Pg.61]

The acid is degassed by blowing out with secondary air and distilled (the head product consisting of highly concentrated acid and the sump product of the azeotropic acid). The azeotropic acid is recycled. The concentration of nitrous gas in the tail gas is <100 ppm. In the Sabar process the manufacture of low or medium concentration acid is possible in addition to highly concentrated acid. These are obtained by adding acid condensate from the combustion of ammonia to the sump of the nitric acid tower. [Pg.61]

The second involves the absorption of N02/N0 in concentrated HNO3 (Re action 3.17). This produces a superazeotropic acid which then is distilled to produce concentrated nitric acid. Examples of these processes are the Uhde CNA (concentrated nitric acid) process and Davy McKee s SABAR (Strong Acid By Azeotropic Rectification) process. [Pg.109]

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