Improved regeneration quality and possibility with LDG (Length and Density Grading) regenerated catalyst

Conference · Thu Sep 01 04:00:00 EDT 1988 · American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA)

OSTI ID:5204377

Seamans, J D; Welch, J G; Vuitel, C A ^[1]

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1. Catalyst Recovery, Inc., Baltimore, MD (USA)

In the management of spent catalyst, the refiner must decide if recovery and reuse is a viable option to consider. Oxyregeneration to remove carbon and sulfur deposits and restore activity is commonly practiced for a wide range of hydroprocessing catalysts. A considerable amount of spent material has not been considered for regeneration and reuse, because it contained high levels of broken or metals contaminated particles, or, because of commingling of two or more different types of catalyst. Until recently, no physical separation techniques were commercially available to the refiner for the recovery of good quality catalyst which has been intermixed with poorer quality material. LDG, which stands for Length and Density Grading, is a new development in the management of spent catalysts. The objective of this new technology developed by Catalyst Recovery, Inc. is to pick out reusable catalyst particles from undesirable catalyst particles. The ability to efficiently segregate individual catalyst particles in this manner has been shown to dramatically reduce the amount of catalyst related to disposal or reclamation. Every month millions of pounds of catalyst are removed from reactors and designated as not suitable for regeneration and reuse because on an average they are too short or too highly contaminated for reuse to be practical or economical. The key phrase is on an average. In most cases the spent catalyst contains a distribution of lengths and/or a range of contaminant level. Consequently, it is common to find that a sizable portion of the spent material would be attractive for reuse if it could be gleaned from the mixture. The following data illustrate a few of the extraordinary results obtained from applying LDG to commercial situations.

• OSTI ID: 5204377
• Report Number(s): CONF-880939--
• Conference Information: Journal Name: American Chemical Society, Division of Petroleum Chemistry, Preprints; (USA) Journal Volume: 33:4
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201 -- Chemical & Physicochemical Properties
CATALYSIS
CATALYSTS
CATALYTIC EFFECTS
CHEMICAL REACTIONS
CRACKING
DATA
DECOMPOSITION
DENSITY
DIMENSIONS
EXPERIMENTAL DATA
HYDROCRACKING
INFORMATION
LENGTH
MANAGEMENT
MATERIALS RECOVERY
NUMERICAL DATA
PARTICLES
PHYSICAL PROPERTIES
PROCESSING
PYROLYSIS
RECOVERY
RECYCLING
REGENERATION
SEPARATION PROCESSES
THERMOCHEMICAL PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING