Multistep process for the manufacture of novel polyolefin lubric

Details Multistep process for the manufacture of novel polyolefin lubric Multistep process for the manufacture of novel polyolefin lubric

1990-02-13

1991-05-21

McFarlane, Anthony

Mineral oils: processes and products

Chemical conversion of hydrocarbons

Plural serial stages of chemical conversion

208 18, 208 49, 208 97, 208215, 585 10, 585250, 585510, 585525, C10G 6902, C10G 6906, C07C 0000

Patent

active

050172794

ABSTRACT:
A multistep process is disclosed for the manufacture of synthetic lubricants from the C.sub.8 to C.sub.24 linear olefin components of below liquid fuel value petroleum distillate fractions derived via the high temperature thermal cracking of petroleum residua. Such feeds contain major amounts of 1-n-olefins, n-paraffins and greater than 0.1% concentration of sulfur mostly in the form aromatic, thiophene type sulfur compounds.
In the first step of the present process such feeds are enriched in the straight chain aliphatic hydrocarbon components by one or more separation processes, preferably via urea adduction or by crystallization. In the second step, the olefin components are oligomerized to sulfur containing C.sub.30 to C.sub.60 polyolefins, preferably in the presence of BF.sub.3 complex catalysts. In the third step, the polyolefins are hydrogenated to novel isoparaffin lubricants in the presence of sulfur resistant catalysts, preferably transition metal sulfides.

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