Abstract: Processes for the recovery of phenol values as cyclohexanol from the purification residue obtained in the amine purification of phenol. The recovery of phenol values may be effected by hydrogenation in the presence of a nickel catalyst and distilling the hydrogenation product to obtain cyclohexanol. Alternatively, the purification residue may be distilled and the distillate hydrogenated to produce a hydrogenation product from which cyclohexanol may be recovered by a second distillation.

Abstract: A method of preparing hexamethyleneimine which comprises the steps of:A. forming a solution of .epsilon.-caprolactam in a solvent selected from the group consisting of linear and cyclic ethers and polyethers having a boiling point of at least about 100.degree. C, said solution having a concentration of about 1 to 40 percent by weight;B. contacting said solution with gaseous hydrogen in the presence of a catalyst comprising copper chromite and at a temperature of about 150 to 300.degree. C. and a pressure of at least about 1,000 psig, whereby a solution containing hexamethyleneimine is formed; andC. recovering hexamethyleneimine from said hexamethyleneimine-containing solution.

Abstract: Palladium catalysts employed in the hydrogenation of reducible cyclic organic compounds containing deleterious nitrogen impurities are reactivated according to a process comprising separating spent catalyst from the hydrogenation reaction mixture; contacting the separated spent catalyst in a liquid reaction medium with a reactivating agent selected from the group consisting of alkali metal and alkaline earth metal bicarbonates, carbonates, nitrates, chlorides, fluorides, hydroxides and mixtures thereof, to reactivate the catalyst; and recovering the reactivated catalyst for recycle to the hydrogenation reaction mixture.