Process to make base oil from thermally cracked waxy feed...

Chemistry of hydrocarbon compounds – Plural serial diverse syntheses – Including alkylation to produce branched-chain paraffin

Reexamination Certificate

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C585S521000, C585S722000

Reexamination Certificate

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07973204

ABSTRACT:
We provide a process for making a base oil, comprising: a) selecting an olefin feed produced by thermal cracking of a waxy feed; b) oligomerizing the olefin feed in an ionic liquid oligomerization zone at a set of oligomerization conditions to form an oligomer; and c) alkylating the oligomer in the presence of an isoparaffin, in an ionic liquid alkylation zone, at a set of alkylation conditions to form an alkylated oligomeric product having a kinematic viscosity at 100° C. of 6.9 mm2/s or greater, a VI of at least 134, and a Bromine Number of less than 4. We provide a process to make base oil from an olefin feed produced in a FCC unit. We also provide a process to make two or more viscosity grades of base oil from an olefin feed produced by thermal cracking of a waxy feed.

REFERENCES:
patent: 5750455 (1998-05-01), Chauvin et al.
patent: 6028024 (2000-02-01), Hirschauer et al.
patent: 6395948 (2002-05-01), Hope et al.
patent: 6497812 (2002-12-01), Schinski
patent: 2007/0249883 (2007-10-01), Dakka et al.
patent: 2009/0131731 (2009-05-01), Willams
patent: 22313-1450 (2007-08-01), None
“UOP Fluid Catalytic Cracking (FCC) and Related Processes”, UOP 4523-7, Jun. 2008.

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