Two step heterocyclic nitrogen extraction from petroleum oils

Patent · Tue Jun 09 04:00:00 EDT 1987

OSTI ID:6340174

Madgavkar, A M; Washecheck, D M

This patent describes a two step process for excising heterocyclic basic nitrogen compounds from a petroleum oil which comprises: treating the petroleum oil in a hydrotreating zone containing a hydrotreating catalyst effective to promote hydrotreating of the petroleum-oil and thereby increase the total heterocyclic basic nitrogen content in the presence of hydrogen at a temperature of from about 600/sup 0/F to about 850/sup 0/F, a pressure of from about 25 atmospheres to about 150 atmospheres and a liquid hourly space velocity of about 0.5 to about 5.0 to form a first petroleum oil fraction lean in heterocyclic basic nitrogen compounds and a second petroleum oil fraction rich in heterocyclic basic nitrogen compounds; and treating the petroleum oil fraction rich in the heterocyclic basic nitrogen compounds in a two phase separation zone in contact with an extraction agent consisting essentially of an aqueous solution of an aliphatic carboxylic acid having from one to fifteen carbon atoms at separation conditions, to form a petroleum oil phase and an aqueous phase and to complex at least a portion of the heterocyclic basic nitrogen compounds with the aliphatic carboxylic acid in the aqueous phase and diminish the quantity of nitrogen compounds in the petroleum phase, passing the two phases to a separation zone to separate the petroleum oil phase containing a lower content of the heterocyclic basic nitrogen compounds from the aqueous phase containing the aliphatic carboxylic acid extraction agent and an increased quantity of the heterocyclic basic nitrogen compounds, and recovering the petroleum oil phase having at least a portion of the heterocyclic basic nitrogen compounds originally present in the petroleum oil excised therefrom.

• Assignee: Shell Oil Co., Houston, TX
• Patent Number(s): US 4671865
• OSTI ID: 6340174
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020400* -- Petroleum-- Processing
AQUEOUS SOLUTIONS
CARBOXYLIC ACIDS
CATALYSTS
CHEMICAL REACTIONS
CRACKING
DECOMPOSITION
DENITRIFICATION
DISPERSIONS
ELEMENTS
ENERGY SOURCES
EXTRACTION
FOSSIL FUELS
FUEL OILS
FUELS
HETEROCYCLIC COMPOUNDS
HIGH PRESSURE
HIGH TEMPERATURE
HYDROCRACKING
HYDROGEN
HYDROGENATION
LIQUID FUELS
MEDIUM PRESSURE
MIXTURES
NITROGEN COMPOUNDS
NONMETALS
OILS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
PYROLYSIS
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
THERMOCHEMICAL PROCESSES