DEMETALLIZATION CATALYST AND PROCESS FOR METALS- CONTAINING HYDROCARBON FEEDSTOCKS

摘要

A particulate synthetic catalyst material composed of substantially aluminum oxide promoted with 0.5-10 W % total metal and having total pore volume of 0.350-0.500 cc/gm for use in demetallization and hydroconversion processes for metals-containing hydrocarbon feedstocks. The catalyst material is preferably spherical shaped and provides a narrow differential size range having a particle equivalent diameter ratio range for larger to smaller particles of about 1.2-2.0, and a preferred nominal 12-18 mesh (U.S. Sieve Series) particle size range. The catalyst can be advantageously used in an ebullated bed reactor in a hydrodemetallization process for hydrocarbon feedstocks containing high metals concentration at reaction conditions of 780-850.degree.F temperature and 1000-3000 psig hydrogen partial pressure. Use of such synthetic catalyst results in improved reactor fluidization operations and low catalyst loss by attrition and carryover of fines from the reactor, and achieves improved results of 60-70 W % hydrodemetallization and 50-70 V % hydroconcersion of the 975.degree.F+ fraction of the feed material to lower boiling hydrocarbon products in a single stage operation.