Method for removing nitrosation agent(s) from a nitrated aromati

Details Method for removing nitrosation agent(s) from a nitrated aromati Method for removing nitrosation agent(s) from a nitrated aromati

1980-05-19

1982-07-06

Gron, Teddy S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Oxygen containing

C07C 7602, C07C 7910, C07C 7912

Patent

active

043384730

ABSTRACT:
Nitrosation agent(s), contained as by-products in nitrated aromatic compounds after nitration with nitric acid or nitration acid, are removed by a water treatment, wherein the water is distilled off at least partially in vapor form, advantageously under reduced pressure. In the further reaction of the nitrocompounds treated in this manner undesired nitrosamines are practically not formed. The process is especially suitable for the manufacture of 4-di-n-propylamino-3,5-dinitrobenzotrifluoride (Trifluralin), a valuable herbicide, substantially free from nitrosamine(s).

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Vogel, A. I., Practical Organic Chemistry, Longmans, Green & Co., London, pp. 507-508, (1948).
The Merck Index, Eight Edition, Merck & Co., Inc., Rahway, N.J., p. 735, (1968).

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