Petroleum distillate upgrading process
AssigneeChevron Research Company
InventorsDennis J. O'Rear, Jerome F. Mayer
Life of this patent
Estimating the term…
Abstract
A petroleum distillate feed is upgraded and a substantial C.sub.3 -C.sub.4 olefin product fraction produced by contacting the feed with ZSM-5 type zeolite at (1) a temperature in the 500.degree.-800.degree. F. range, (2) a pressure below about 13 atmospheres gauge, and (3) an LHSV in the 0.1-15 V/V/Hr range, and fractionating the effluent product stream.
Claims9
A process for upgrading a petroleum distillate feed consisting essentially of hydrocarbons having a normal boiling point range in the range of from about 400.degree. to 1000.degree. F. and producing C.sub.3 -C.sub.4 olefins, based upon feed converted, in an amount in the range of from about 2 to 10 weight percent, comprising producing an effluent stream containing C.sub.3 -C.sub.4 olefins by contacting said feed with a catalyst comprising ZSM-5-type crystalline aluminosilicate zeolite in a form which is substantially free of hydrogenation activity, said contacting being under conditions including (a) a temperature in the range of from about 500.degree. to 800.degree. F.;
- (b) a pressure below about 13 atmospheres gauge;
- and (c) a liquid hourly space velocity in the range of from about 0.1 to 15, said feed having a content of nitrogen-containing impurities, calculated by weight as nitrogen, below about 5 ppm.
Dependencies are inferred from the claim text.