Chemistry of hydrocarbon compounds – Unsaturated compound synthesis – By addition of entire unsaturated molecules – e.g.,...
Patent
1985-03-07
1986-02-04
Davis, Curtis R.
Chemistry of hydrocarbon compounds
Unsaturated compound synthesis
By addition of entire unsaturated molecules, e.g.,...
585533, C07C 202
Patent
active
045687862
ABSTRACT:
Olefin upgrading in plural reactors can achieve conversion of lower olefinic feedstock, such as propene, butene, etc., to valuable heavy hydrocarbons containing a lubricant fraction of high viscosity index. Other fuel products, such as (C.sub.10 -C.sub.20) distillate, gasoline and LPG may also be recovered as products. In a preferred process for converting lower olefinic feed to heavier hydrocarbons by contacting the feed with a shape selective medium pore acidic zeolite catalyst at elevated temperature and pressure the catalyst surface is rendered relatively inactive by adding to the olefinic feed an inactivating amount of a sterically-hindered organic base, whereby the catalyst is selectively surface-deactivated, to produce substantially linear heavier hydrocarbons rich in C.sub.10.sup.+ olefins. In the preferred multi-stage process the olefinic feed comprises C.sub.2 -C.sub.8 olefins and the catalyst employed in each stage comprises aluminosilicate having a silica-to-alumina mole ratio of at least 12 and a constraint index of about 1 to 12.
REFERENCES:
patent: 4211640 (1980-07-01), Garwood et al.
patent: 4414423 (1983-11-01), Miller
patent: 4433185 (1984-02-01), Tabak
patent: 4450311 (1984-05-01), Wright et al.
patent: 4456779 (1984-06-01), Owen et al.
Hsia Chen Catherine S.
Tabak Samuel A.
Davis Curtis R.
Gilman M. G.
McKillop A. J.
Mobil Oil Corporation
Wise L. G.
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