초록 ▼

In the process of phenol hydrogenation to cyclohexanol, improved yields of cyclohexanol are obtained by maintaining a hydrogen atmosphere throughout the entire operation. Of particular importance is that the hydrogen atmosphere is maintained during the time period when the nickel catalyst is allowed

In the process of phenol hydrogenation to cyclohexanol, improved yields of cyclohexanol are obtained by maintaining a hydrogen atmosphere throughout the entire operation. Of particular importance is that the hydrogen atmosphere is maintained during the time period when the nickel catalyst is allowed to settle and prior to decantation of the clear liquids.

대표청구항 ▼

In the batch-type method of manufacture of cyclohexanol by the hydrogenation of phenol in the presence of a nickel catalyst in an amount of about 2 to 10 percent by weight catalyst, at a temperature of from about 100°to 200°C. and a pressure of from about atmospheric to 250 psig (1.72×106 pascals),

In the batch-type method of manufacture of cyclohexanol by the hydrogenation of phenol in the presence of a nickel catalyst in an amount of about 2 to 10 percent by weight catalyst, at a temperature of from about 100°to 200°C. and a pressure of from about atmospheric to 250 psig (1.72×106 pascals), with agitation of liquid phenol and catalyst suspended therein, then allowing the catalyst to settle and separating the catalyst from the reactants, the improvement comprising maintaining a hydrogen atmosphere during the entire period that catalyst is in contact with reactants, particularly including during the time when catalyst is separated from the reactants, whereby yield of cyclohexanol is improved and yield of by-product cyclohexanone is decreased.