Control of nitrogen oxide reactions in off-gases from the diazot

Details Control of nitrogen oxide reactions in off-gases from the diazot Control of nitrogen oxide reactions in off-gases from the diazot

1975-11-25

1977-04-26

Higel, Floyd D.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260141, 260578, 423235, 423245, 423400, 423405, C07C11500, C07C11300, C01B 2100, B01J 800

Patent

active

040200515

ABSTRACT:
The deposition of an aromatic diazonium nitrate on the walls of a pipeline through which is conducted a residual gas produced in the diazotization of a primary aromatic monoamine is prevented by heating the walls of the pipeline, limiting the residence time of the gas in the pipeline, or providing for the absence of nitrogen dioxide in the gas. Nitrogen dioxide can form in the pipeline when nitric oxide and molecular oxygen are present, but the deposition of the diazonium nitrate, formed from the nitrogen dioxide via a reaction with the monoamine, is prevented by the hot pipeline walls and/or short residence time.

REFERENCES:
patent: 2133037 (1938-10-01), Moyer
patent: 2894942 (1959-07-01), Hydro et al.
Filippuichev et al, Chemical Abstracts, vol. 28, 3720, 7-8 (1934).
Sutcliffe et al, Chemical Abstracts, vol. 69, No. 87957p (1968).
Houben-Weyl, "Methoden der Organischen Chemie", Vol. X/3, p. 712 (1965).
Remy, "Treatise on Inorganic Chemistry", vol. I, pp. 598 and 599 (1956).

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