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C07C209/00—Preparation of compounds containing amino groups bound to a carbon skeleton
C07C209/30—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds
C07C209/32—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups
C07C209/36—Preparation of compounds containing amino groups bound to a carbon skeleton by reduction of nitrogen-to-oxygen or nitrogen-to-nitrogen bonds by reduction of nitro groups by reduction of nitro groups bound to carbon atoms of six-membered aromatic rings in presence of hydrogen-containing gases and a catalyst
Abstract
and 2,6-Tolylenediamines are prepared by the catalytic reduction of 2,4- and 2,6-dinitrotoluene in toluene wiht ammonia synthesis gas, which may be fresh or recycled gas, at 150 degrees C and 50 atm. in the presence of a Raney copper catalyst. Higher yields of the tolylenediamines are obtained, generally in the range 96-99%.
Process for the production of urea by synthesis of ammonia and carbon dioxide, with total recycling of the portion which has not been converted into urea
The relation between creep rate and microstructure of a chromium-molybdenum steel(Creep rate relation to microstructure of chromium- molybdenum steel, noting austenitic transformation effect)