Mineral oils: processes and products – Refining – Nitrogen contaminant removal
Patent
1987-05-29
1988-12-13
Sneed, H. M. S.
Mineral oils: processes and products
Refining
Nitrogen contaminant removal
208 87, 208 90, 208117, 208263, 208265, C10G 1704, C10G 2106
Patent
active
047909307
ABSTRACT:
A process is disclosed for the removal of basic heterocyclic nitrogen compounds from a petroleum crude oil or fraction thereof which comprises first treating the petroleum crude oil or fraction thereof rich in basic heterocyclic nitrogen compounds in a two-phase extraction zone with an extractant consisting essentially of an aqueous solution of a lower carboxylic acid, preferably having between 1 and 15 carbon atoms. The extractant complexes the basic heterocyclic nitrogen compounds to produce a stream of petroleum crude oil or fraction thereof having a smaller content of heterocyclic nitrogen compounds and a stream comprising the lower carboxylic acid extractant with an increased quantity of basic heterocyclic nitrogen compounds. The petroleum crude oil or fraction thereof possessing a reduced quantity of heterocyclic nitrogen compounds is hydrotreated in the presence of hydrogen and a hydrotreating catalyst to further remove the basic heterocyclic nitrogen compounds. The extractant stream is treated in an extractant separation zone to renovate the extractant for recycle to the two-phase extractant zone, substantially free of removed basic heterocyclic nitrogen compounds.
REFERENCES:
patent: 1686136 (1928-10-01), Ihrig
patent: 2263175 (1941-11-01), Lazar et al.
patent: 2263176 (1941-11-01), Lazar et al.
patent: 2352236 (1944-06-01), Thomas
patent: 2518353 (1950-08-01), McKinnins
patent: 2662843 (1953-12-01), Castner
patent: 2800427 (1957-07-01), Junk et al.
patent: 3023160 (1962-02-01), Stedman
patent: 3551324 (1970-12-01), Lillard
patent: 3719587 (1973-03-01), Karchmer et al.
patent: 4209385 (1980-06-01), Stover
patent: 4271009 (1981-06-01), Stover et al.
patent: 4272361 (1981-06-01), Compton
patent: 4332675 (1982-06-01), Baset
patent: 4332676 (1982-06-01), Baset
patent: 4392948 (1983-07-01), Debande
patent: 4409092 (1983-10-01), Johnson et al.
patent: 4426280 (1984-01-01), Chen et al.
patent: 4483763 (1984-11-01), Kuk et al.
patent: 4534096 (1985-09-01), Rudnick
patent: 4605484 (1986-08-01), Madgavkar
patent: 4623444 (1986-11-01), Che et al.
patent: 4671865 (1987-06-01), Madgavkar
Madgavkar Ajay M.
Washecheck Don M.
Myers Helane
Shell Oil Company
Sneed H. M. S.
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