In cyclohexanol dehydrogenation processes CYCLOHEXANONE

摘要

1. A process for the dehydrogenation of cyclohexanol to cyclohexanone in the gas phase at elevated temperature in the presence of a catalyst comprising zinc oxide and calcium carbonate, wherein the catalyst is 56 ÷ 88 wt. % Consists of zinc oxide and 8.0 ÷ 39.0 wt. % - kaltsiya.2 carbonate. A method of dehydrogenation of cyclohexanol to cyclohexanone according to claim 1, characterized in that the used catalyst is used as a catalyst system with alternating gas during the following layers of different height, filled with catalyst in various proportions, and ceramics: - first - protective-distribution layer 10 made of ceramics height ÷ 20 cm - second - layer of ignition area of ​​the main reaction from the catalyst and ceramics in a ratio of 1: 1 with a bed height to the diameter of the flue gas duct, - third - a layer of the main reaction zone catalyst and ceramics in the ratio 3: 1 with a bed height equal to the height of the apparatus to the first input gazohoda.3. A method of dehydrogenation of cyclohexanol to cyclohexanone according to claim 1, characterized in that the prestart preparations consists in directly heating the catalyst in a reactor under nitrogen at a temperature of 320 ÷ 350 ° C for 6 ÷ 8 p.4. A method of dehydrogenation of cyclohexanol to cyclohexanone according to claim 1, characterized in that the dehydrogenation process is carried out at a temperature of 320 ÷ 440 ° C, and the volumetric feed rate is maintained in the range 1.5 ÷ 2.0 hours.