Organic compounds -- part of the class 532-570 series – Organic compounds – Amino nitrogen containing
Patent
1998-11-06
1999-07-13
Killos, Paul J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Amino nitrogen containing
564441, C07C20900
Patent
active
059229136
ABSTRACT:
Disclosed is a process of nitrating or dinitrating an aromatic amine compound that involves reacting the aromatic amine and nitric acid in the presence of acetic acid such that the molar ratio of the aromatic amine compound to acetic acid is from about 1:2 to about 1:16, and the molar ratio of nitric acid to the aromatic amine is between about 1.0 to about 1.5 times the nitric acid needed to complete the reaction. More particularly, the invention is a process of forming Pendimethalin, N-(1-ethylpropyl)-2,6-dinitro-3,4-xylidine, from N-(1-ethylpropyl)-3,4-xylidine (4-NAX) that involves reacting 4-NAX and nitric acid in the presence of acetic acid such that the molar ratio of nitric to the 4-NAX is between about 2:1 and about 3:1, preferably between about 2:1 and about 2.6:1, and such that the molar ratio of 4-NAX to acetic acid is between about 1:2 to about 1:16, preferably between about 1:4 and about 1:8.
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Kwiatkowski Stefan
Lawrence Lowell J.
Smith Paul D.
Killos Paul J.
SRM Chemical, Ltd. Co.
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