New FCCU DEMET{reg_sign} process to produce demetallized spent catalyst with high activity and low hydrothermal deactivation rates
- Coastal Catalyst Technology, Inc., Houston, TX (United States)
Fluid Catalytic Cracking is a valuable refining process to upgrade heavy hydrocarbons to high valued products. During the cracking reaction, catalyst is contaminated by deposited metals from feedstocks which include nickel, vanadium, et al. To compensate for decreased FCCU feedstock conversion and product selectivity, a portion of the circulating catalyst equilibrium inventory is withdrawn for spent catalyst disposal, and fresh catalyst is added to the system. DEMET{reg_sign} is a valuable process to demetallize spent catalyst for recycle to the FCCU. The DEMET receives a portion of the spent catalyst and removes a portion of the metal contaminants, enabling the refiner to recycle demetallized catalyst base material. Demetallized spent FCCU catalyst recycle has reduced the requirements for fresh catalyst additions and reduced generation of catalyst fines. DEMET processing removes contaminants known to be detrimental to conversion, product selectivities, and mechanical performance of the FCCU. With DEMET capacity sized to reduce metals levels on circulating catalyst, yields could be improved due to lower metals on circulating catalyst. Through September, 1995, the operation of one unit for one refiner has resulted in the recycle of over 15,000 tons of spent FCCU catalyst back to the FCCU. The paper describes the DEMET process and its modifications.
- OSTI ID:
- 403503
- Report Number(s):
- CONF-960356-; TRN: IM9651%%538
- Resource Relation:
- Conference: 1996 National Petroleum Refiners Association annual meeting, San Antonio, TX (United States), 17-19 Mar 1996; Other Information: PBD: 1996
- Country of Publication:
- United States
- Language:
- English
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