Dripping sphere shaping method

Abstract

The invention relates to the field of dripping sphere shaping and discloses a dripping sphere shaping method including: performing dripping sphere shaping on slurry containing oxide particles to formdroplets, coating the droplets with protective oil to form wet slurry spheres; and shaping the wet slurry spheres into spherical particles through an oil ammonia column. The oxide includes at least one of alumina, aluminum sol, silica sol, zirconium oxide, magnesia, silica, and molecular sieves. The protective oil includes at least one of hexane, heptane, octane, nonane, toluene, gasoline, kerosene and petroleum ether. The method solves the problem of adhesion or blocking on the dripper during the shaping process with the oil ammonia column and the loss of oil phase during the shaping process,has convenience in replacement of the dripper, and can be used for producing spherical particles continuously in large scale.

Description

technical field [0001] The invention relates to the field of forming oil and ammonia columns, in particular to a method for forming drop balls. Background technique [0002] The oil ammonia column forming method is a common method for preparing alumina, silicon oxide, silicon aluminum and other pellets. In this method, the sol (such as aluminum sol, silica sol, etc.) is dropped into the oil ammonia column, so that the sol particles form balls in the oil phase in the upper layer of the oil ammonia column, and gel in the ammonia water in the lower layer. After aging, the gelled particles are dried and calcined to obtain spherical solid particles. The pellets prepared by this method have uniform structure, low wear and high strength, and are widely used as fixed bed and moving bed catalysts, catalyst carriers, and adsorbents. [0003] Industrial catalysts have different shapes and sizes according to the process operation requirements, so the molding operation is the main step...

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the dropper of the oil ammonia column forming device in the prior art is easy to block, the dripper is stuck to the slurry, and the oil layer of the oil ammonia pool of the oil ammonia column forming device is consumed too quickly, and provides The method of dripping ball forming, which overcomes the defects of slurry blockage and sticking, and also solves the problem of excessive consumption of the oil layer in the oil ammonia pool, can make the oil ammonia column form a long-term operation, and reduce the oil phase loss and the dripper easy to replace

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