| 摘要 |
FIELD: chemistry.SUBSTANCE: invention relates to catalytic process of cyclohexanol dehydrogenation in ε-caprolactam production technology. Declared catalyst for dehydrogenation of cyclohexanol into cyclohexanone contains calcium carbonate, zinc oxide, additionally contains a mixture of thermally expanded graphite and schungite in 1.0-1.2:0.1-0.12 ratio in the following proportions, wt%: calcium carbonate - 16.0-38.0; zinc oxide - 61.5-2.5; mixture of thermally expanded graphite and schungite - 0.5-1.5. Invention also relates to a method of producing catalyst for dehydrogenation of cyclohexanol into cyclohexanone, containing zinc oxide and calcium carbonate, which involves preparation of a reaction mixture containing sources of zinc oxide and calcium carbonate, moulding, drying, grinding, ignition, first, a primary mixture containing, wt%: calcium carbonate - 12.4-29.8, carboxymethyl cellulose or methyl cellulose - 0.1-1.0, main zinc carbonate balance is prepared, the mixture of thermally expanded graphite and schungite is added in quantities providing for obtaining a catalyst with the following composition, wt%: calcium carbonate - 16.0-38.0; zinc oxide - 61.5-82.5; mixture of thermally expanded graphite and schungite - 0.5-1.5, the primary mixture for preparing the catalyst is produced by mechanochemical activation in an apparatus consisting of screw mixer, dosing device, rotary-pulsed apparatus in the presence of carboxymethyl cellulose or methyl cellulose to obtain a homogeneous mixture is dried until complete removal of moisture, percussion-type mill are simultaneously with introduction of thermally expanded graphite and schungite for producing catalyst mass, which is then annealed , cooled and moulded in the form of tablets or cylinders of given dimensions.EFFECT: technical result of the invention consists in improvement of quality and increasing service life of catalyst due to increased specific surface area, mechanical strength and formability, activity and selectivity.2 cl, 3 tbl, 3 ex |
