Method for rejuvenating catalysts in hydrodesulfurization of hydrocarbon feedstock

Patent · Tue Oct 24 00:00:00 EDT 1978

OSTI ID:6316492

Farrell, D R; Ward, J W

A process for removing vanadium and nickel deactivants from contaminated hydrodesulfurization catalysts comprising Group VIB and/or VIII active components on refractory oxide supports comprising contacting the catalysts with an aqueous solution of (1) oxalic acid and (2) at least one inorganic component selected from the class consisting of nitric acid and water-soluble nitrate salts. The removal of vanadium and nickel contaminants from the surface of a deactivated catalyst by the process of the invention substantially rejuvenates the catalyst for hydrodesulfurization purposes, provided such removal is accomplished prior to burning off any coke that may also be present on said catalysts.

• Assignee: Union Oil Co. of California
• Patent Number(s): US 4122000
• OSTI ID: 6316492
• Resource Relation: Patent File Date: Filed date 5 Jan 1978
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
CATALYSTS
REGENERATION
NICKEL
DECONTAMINATION
VANADIUM
AQUEOUS SOLUTIONS
CHEMICAL ACTIVATION
DESULFURIZATION
NITRATES
NITRIC ACID
OXALIC ACID
PETROLEUM
CARBOXYLIC ACIDS
CHEMICAL REACTIONS
CLEANING
DICARBOXYLIC ACIDS
DISPERSIONS
ELEMENTS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
INORGANIC ACIDS
METALS
MIXTURES
NITROGEN COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
SOLUTIONS
TRANSITION ELEMENTS
020400* - Petroleum- Processing