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Removal of Impurities by Magnetic Separation from Waste Fluidized Cracking Catalyst for Its Reuse  

Ban Bong-Chan (순천대학교 금속공학과)
Lee Jin-Suk (이화여자대학교 환경학과)
Kim Dong-Su (이화여자대학교 환경학과)
Publication Information
Resources Recycling / v.12, no.1, 2003 , pp. 55-64 More about this Journal
Abstract
Presently, the reuse of waste FCC catalysts, which generated from the refining process of crack oil, after the removal of con-taminated metallic impurities have not been attempted domestically yet because the separation technology f3r the impurities from waste catalysts has not been established. As a basic study far the reusable portion from the waste FCC catalysts and treatment of metallic impurities are assured, there will be invoked an significant contribution not only in the recycling of abandoned wastes up to date but also in the treatment efficiency of wastes and extraction of economical benefits from them. The magnetic separation of impurities such as Fe, Ni, and V, from waste FCC catalyst has been attempted with or without its pre-oxidation at high temperature for the purpose of its reuse. The results showed that the separability of impurities by magnetic force was high far non-preoxidized catalysts compared with preoxidized ones, and employment of screen-type matrix showed a higher separation efficiency than ball-type matrix. The separability increased with the strength of magnetic field, and the method of ball matrix has separation efficiency of maximum 51.10%. The amount of metallic impurities was in the decreasing order of V, Ni, and Fe depending upon ICP analysis.
Keywords
FCC; Waste Catalyst; Reuse; Metallic Impurities; Magnetic Separation;
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