摘要:
A process for preparing orthotrifluoromethyl aniline from trifluoromethyl benzene is disclosed. The steps are (a) reacting the trifluoromethyl benzene with gaseous chlorine in the presence of a chlorination catalyst until at least 90% of the trifluoromethyl benzene is consumed; (b) nitrating the crude mixture from step (a) using a mixture of sulfuric acid and nitric acid until disappearance of the chlorotrifluoromethyl benzenes; (c) settling and washing the organic phase from step (b); (d) subjecting the organic phase from step (c) to a first hydrogenation under pressure in the presence of a hydrogenation catalyst consisting of Raney nickel and/or Raney nickel doped with chromium, in an organic-solvent medium until complete disappearance of the chloronitrotrifluoromethyl benzenes; (e) subjecting the mixture from step (d) to a second hydrogenation in the presence of an additional amount of Raney nickel and in the presence of at least one alkaline base; and (f) removing the orthotrifluoromethyl aniline by distillation from the reaction mixture.
摘要:
A catalyst for hydrogenation, hydroformylation, olefin oxidation and similar reactions is prepared by treating activated carbon first with a volatile acid and then with a basic substance to provide a suitable support for the catalyst, and then adsorbing onto such support a coordination complex of a transition metal. The adsorption of the catalyst onto the support may be effected in situ during the hydrogenation, hydroformylation, oxidation, etc. reaction.
摘要:
Substituted amines are prepared with high selectivity by reacting olefin, hydrogen, CO and secondary amine in the presence of a coordination complex catalyst of a Group VIII metal and a ligand, the donor atom of which is oxygen, nitrogen or sulfur.
摘要:
Solid catalyst, insoluble in organic and aqueous solvents and having the general formula:A -- M (L').sub.n (L").sub.qin which A is an insoluble ligand, M is a Group VIII noble metal, L' and L" are ligands and n and q are intergers of 0 to 6 are provided for the advantageous catalysis of hydroformylation, and hydrogenation of olefins and the preparation of tertiary amines from olefins.