Method of eliminating excess nitrite in diazotisation solutions

Details Method of eliminating excess nitrite in diazotisation solutions Method of eliminating excess nitrite in diazotisation solutions

1986-07-08

1989-07-04

Lall, Parshotam S.

Boots, shoes, and leggings

364550, 422110, 422119, 534579, G06F 1546, G05D 700

Patent

active

048456381

ABSTRACT:
The invention relates to an automatically controlled continuous method of eliminating excess nitrite in diazotization solutions of aromatic amines, which comprises controlling the addition of the agent employed for eliminating the nitrite ions by means of an electrochemically controlled variable.
The process permits a smooth monitoring of the nitrite ion concentration in diazotization solutions. It is advantageous that the determination of the electrochemical controlled variable is almost instantaneous and that the addition of agent for removing nitrite ions can be controlled in simple manner via the fluctuations in the potential.

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