Process for the removal of NO.sub.x from a fluid stream

Details Process for the removal of NO.sub.x from a fluid stream Process for the removal of NO.sub.x from a fluid stream

1997-12-30

1999-10-05

Woo, Jay H.

Liquid purification or separation

Processes

Chemical treatment

210903, 423235, C02F 172

Patent

active

059618442

ABSTRACT:
A process is provided for removing the NO.sub.x from a fluid stream (e.g. a waste gas stream such as a flue gas stream produced during combustion). The process entails the contacting of the stream, prior to discharge into the atmosphere, with an aqueous alkaline solution containing an organic hydroperoxide such as cumenyl hydroperoxide or tert-butyl hydroperoxide. The solution has a pH of greater than 7 to about 14 which is provided by an alkali such as calcium hydroxide or calcium carbonate. The process is preferably carried out at a temperature of 50 to 95.degree. C.

REFERENCES:
patent: 4426364 (1984-01-01), Cooper
patent: 4564510 (1986-01-01), Bechthold et al.
patent: 5366711 (1994-11-01), von Wedel et al.
patent: 5595713 (1997-01-01), Gohara et al.
patent: 5637282 (1997-06-01), Osborn et al.
Cooper and Alley, Control of sulfur oxides, in Air pollution control, 2nd ed, Waveland Press, Inc. Chapter 14.
Jahnig and Shaw, 1981, JAPCA, 31:421-8; 596-604.
Perlmutter et al, 1993, Environ Sci Technol, 27: 128-33.

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