METHOD OF ADIABATIC PREPARATION OF MONONITROTOLUENS

METHOD OF ADIABATIC PREPARATION OF MONONITROTOLUENS

(Dis)continuous prodn. of mono nitrotoluene comprises (A) feeding toluene, HNO3, H2SO4 and H2O in any order into a stirred reactor such that (i) the amts. in the acid/H2O component are 1-8 wt.% HNO3, 58-74 wt.% H2SO4 and water to 100 wt.%, (ii) the water is added as such and/or as diluent for the HN...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KONIG BERND-MICHAEL DR, JUDAT HELMUT DR, BLANK HEINZ ULRICH DR
Format: Patent
Sprache:eng
Schlagworte:
ACYCLIC OR CARBOCYCLIC COMPOUNDS
CHEMISTRY
COMPOUNDS THEREOF
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:(Dis)continuous prodn. of mono nitrotoluene comprises (A) feeding toluene, HNO3, H2SO4 and H2O in any order into a stirred reactor such that (i) the amts. in the acid/H2O component are 1-8 wt.% HNO3, 58-74 wt.% H2SO4 and water to 100 wt.%, (ii) the water is added as such and/or as diluent for the HNO3 and/or H2SO4 and (iii) the mol. ratio toluene:HNO3 = 0.9-1.5, (B) rapidly and intensively mixing at an energy of 1-40 (pref. 3-30) Watt/l. of reactant, (C) effecting reaction under adiabatic conditions such that the reactants are fed in at such a temp. that reaction proceeds at 50-110 (esp. 80-90) degrees C with the temp. not exceeding 135 degrees C at the end pt., (D) sepg. the mixt. at the end of the reaction into an organic and an inorganic phase, and (E) working up the HNO3-free inorganic phase by distn. to remove H2O.