| 摘要 |
FIELD: chemistry. ^ SUBSTANCE: invention relates to the technology of making carbon carriers for different types of catalysts and sorbents. Description is given of a method of making large spherical carbon carrier for catalysts, which involves heating a moving bed of palletised black to 800-900C, feeding a stream of gaseous or vaporous hydrocarbons in the moving bed, packing the carbon black by thermal decomposition of hydrocarbons on the surface of its particles with formation of pyrocarbon until attaining 0.5-0.7 g/cm3 packed density of carbon black, cooling the mass of the material and its screening with separation of the fraction of granules, which are subjected to repeated pyrolytic packing with subsequent activation of the obtained product. This method is distinguished by that, gaseous or vaporous hydrocarbons are fed into the layer of carbon black at the first and second stages with different bulk speed: at the first stage with speed of 65-72 hour-1, and at the second stage at temperature 650-750C and speed 52-58 hour-1. Granules with size 3.5-6.0 mm undergo packing at the second stage. Material is activated until attaining void space of 0.3-0.7 cm3/g. At the second stage packing using pyrocarbon is done until attaining weight of granules of 0.88-0.95 g/cm3. ^ EFFECT: obtaining a carrier with strong and composition homogenous granules. ^ 2 cl, 2 ex |
