Mineral oils: processes and products – Chemical conversion of hydrocarbons – Plural serial stages of chemical conversion
Patent
1987-05-22
1988-06-07
Sneed, Helen M. S.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
Plural serial stages of chemical conversion
208 18, 208 74, 208111, 208155, 502 20, L10G 6510
Patent
active
047494670
ABSTRACT:
An improved method which provides for an extended cycle length in catalytic lube dewaxing of residual lube oil feedstocks and easier catalyst regeneration. The method may incorporate catalytically dewaxing a feedstock in a fixed bed reactor with or without product recycle, or a series of reactors with interreactor separation of vapors from liquids. Improved performance is achieved by operating the reactor at a temperature between about 490.degree. and about 620.degree. F., employing a high activity crystalline zeolite catalyst having an alpha value between about 50 and about 900 based on the zeolite and a space velocity sufficiently low to produce a dewaxed effluent of desired pour point and to maintain an average catalyst aging rate of less than about 2.degree. F. per day. This relatively low temperature operation allows catalyst performance to be restored by simple hydrogen reactivation.
REFERENCES:
patent: Re28398 (1975-04-01), Chen et al.
patent: 3291719 (1966-12-01), Dill
patent: 3418256 (1968-12-01), Rigney et al.
patent: 3579436 (1971-05-01), Mounce
patent: 3668113 (1972-06-01), Burbidge et al.
patent: 3686093 (1972-08-01), Irvine
patent: 3755138 (1973-08-01), Chen et al.
patent: 3904510 (1975-09-01), Sinfelt et al.
patent: 3956102 (1976-05-01), Chen et al.
patent: 3986982 (1976-10-01), Crowson et al.
patent: 4100056 (1978-07-01), Reynolds et al.
patent: 4211635 (1980-07-01), Chen
patent: 4213847 (1980-07-01), Chen et al.
patent: 4222855 (1980-09-01), Pelrine et al.
patent: 4229282 (1980-10-01), Peters et al.
patent: 4247388 (1981-01-01), Banta et al.
patent: 4305808 (1981-12-01), Bowes et al.
patent: 4357232 (1982-11-01), Holland et al.
patent: 4372839 (1983-02-01), Oleck et al.
patent: 4390413 (1983-06-01), O'Rear et al.
patent: 4400265 (1983-08-01), Shen et al.
patent: 4414097 (1983-11-01), Chester et al.
patent: 4418235 (1983-11-01), Haag et al.
patent: 4428819 (1984-01-01), Shu et al.
patent: 4428826 (1984-01-01), Walsh
patent: 4443327 (1984-04-01), Shihabi et al.
patent: 4448673 (1984-05-01), Shihari
patent: 4501656 (1985-02-01), Dufresne et al.
patent: 4510045 (1985-04-01), Dessau
patent: 4536486 (1985-08-01), Lewis
patent: 4554065 (1985-11-01), Albinson et al.
patent: 4574043 (1986-03-01), Chester et al.
Chen Nai Y.
Pelrine Bruce P.
Gilman Michael G.
McFarlane Anthony
McKillop Alexander J.
Mobil Oil Corporation
Santini Dennis P.
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