초록 ▼

An improvement in a process for decomposing cyclohexyl hydroperoxide to cyclohexanone and cyclohexanol is provided. According to the improved process, a reaction mixture comprising cyclohexane and cyclohexyl hydroperoxide is contacted with two catalyst compositions sequentially for a preselected rea

An improvement in a process for decomposing cyclohexyl hydroperoxide to cyclohexanone and cyclohexanol is provided. According to the improved process, a reaction mixture comprising cyclohexane and cyclohexyl hydroperoxide is contacted with two catalyst compositions sequentially for a preselected reaction period, such that the reaction mixture is contacted with a catalytic amount of the first of said catalyst compositions only for about 10 to about 80 percent of the reaction period, and contacted with a catalytic amount of a mixture of the first and second catalyst compositions for the remainder of the preselected reaction time. The first catalyst composition of the invention is a cyclohexane-soluble chromium organic acid salt, and the second catalyst composition is a cobalt, iron, or manganese complex of a 1,3-bis(2-pyridylimino)isoindoline.

대표청구항 ▼

In a process in which cyclohexyl hydroperoxide is decomposed in a reaction mixture comprising cyclohexyl hydroperoxide and cyclohexane to produce cyclohexanone and cyclohexanol, the improvement comprising contacting the reaction mixture, at a temperature from about 80°C. to about 130°C. and at a pre

In a process in which cyclohexyl hydroperoxide is decomposed in a reaction mixture comprising cyclohexyl hydroperoxide and cyclohexane to produce cyclohexanone and cyclohexanol, the improvement comprising contacting the reaction mixture, at a temperature from about 80°C. to about 130°C. and at a pressure from about 69 kPa to about 2760 kPa, with two catalyst compositions sequentially for a preselected reaction period, such that the reaction mixture is contacted with a catalytic amount of the first of said catalyst compositions only for about 10 to about 80 percent of the reaction period, and contacted with a catalytic amount of a mixture of the first and second catalyst compositions for the remainder of the preselected reaction time, wherein the first catalyst composition consists essentially of a cyclohexane-soluble chromium(III) salt of an organic acid selected from the group consisting of 2-ethylhexanoic acid, naphthenic acids, monoalkylarene or dialkylarene sulfonic acids, monoalkyl or dialkyl phosphoric acids or mixtures thereof, lauric acid, stearic acid, palmitic acid or linoleic acid, and the second catalyst composition consists essentially of one or more transition metal complexes having the structural formula [Figure] wherein the primary ligand is the entity in brackets; M is Co, Mn or Fe; R1, R2, R3 and R4 are independently hydrogen or methyl; X is an ancillary anionic ligand; n is 1 or 2; and p is 0, 1 or 2, provided that n+p is 2 or 3; with the proviso that when there are two primary ligands, the values of R1, R2, R3 and R4 can be different for each ligand and when there are two ancillary anionic ligands, the value of X can be different.