Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-01-06
1978-07-25
Wyman, Daniel E.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C 8760
Patent
active
041029267
ABSTRACT:
A method for producing 4-nitrosodiphenylamine, consisting in diphenylamine nitrozation with nitrites of alkali metals or ammonium nitrite in the presence of an acid and an organic solvent nonmiscible with water; said nitrozation being carried out under stirring with a speed determined by Reynolds number not below, 8-10.times.10.sup.3 or in the presence of polymers of methacrylic acid esters in an amount of 0.01-0.02% of the reaction mixture weight under stirring with a speed determined by Reynolds number equal to 4-5.times.10.sup.3 ; this is followed by rearrangement of the resultant N-nitrosodiphenylamine with anhydrous hydrogen chloride in an inert gas atmosphere in the presence of an alkyl 4-aminodiphenylamine in an amount of 0.5-1% of the N-nitrosodiphenylamine weight, with subsequent neutralization of the formed 4-nitrosodiphenylamine hydrochloride and isolation of the desired product. The method described above makes it possible to increase the product yield at the nitrozation stage by a factor of 5-6 and to raise the yield of the desired product up to 99% in terms of the converted N-nitrosodiphenylamine. 4-Nitrosodiphenylamine produced serves as an intermediate in the synthesis of antioxidants for rubbers and plastics, in the synthesis of dyestuffs, and is also used as a component in a number of antioxidant compositions.
REFERENCES:
patent: 2560893 (1951-07-01), Roberts
patent: 3429924 (1969-02-01), Ellerbrook et al.
patent: 3728392 (1973-04-01), Levy et al.
patent: 3748362 (1973-07-01), Kinstler
patent: 3978131 (1976-08-01), Pawellek et al.
Dost et al., "Chem. Ab.", vol. 52, Ab. No. 4686g (1958).
Martynov et al., "Chem. Ab.", vol. 80, Ab. No. 84063k (1974).
Formenova Galina Alexandrovna
Genkina Elena Vladimirovna
Kokoulin Felix Georgievich
Manelis Georgy Borisovich
Naumov Sergei Nikolaevich
Doll John J.
Wyman Daniel E.
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