Petroleum distillate upgrading process
AssigneeChevron Research Company
InventorsDennis J. O'Rear, Jerome F. Mayer
Life of this patent
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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.
Claims8
A process for increasing the effectiveness of petroleum processing, comprising:
- (A) upgrading a petroleum distillate feed which consists essentially of hydrocarbons having a normal boiling point range in the range of from about 180.degree. to 1200.degree. F., through use of an upgrading process comprising,
- (i) producing a process stream containing a C.sub.3 -C.sub.4 olefin product fraction in an amount, based upon upgrading feed converted, in the range of from about 2 to 10 weight percent, by contacting said feed with a catalyst comprising a 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 20, said feed having a content of nitrogen-containing impurities, calculated by weight as nitrogen, below about 5 ppm;
- (ii) producing an upgraded effluent stream by removing the olefin product fraction from said process stream;
- and
- (iii) recovering said upgraded effluent stream;
- in conjunction with
- (B) hydrocracking or reforming a petroleum feedstock.
A process for upgrading a petroleum distillate feed consisting essentially of hydrocarbons having a normal boiling point in the range of from about 180.degree. F. to about 1200.degree. F. and producing at least a substantial C.sub.3 -C.sub.4 olefin product fraction, by
- (1) producing a process stream by contacting said feed with a catalyst comprising a ZSM-5-type crystalline aluminosilicate 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 20, said feed having a content of nitrogen-containing impurities, calculated by weight as nitrogen, below about 5 ppm;
- and
- (2) recovering an upgraded effluent stream and olefin fraction by fractionating said process stream.
Dependencies are inferred from the claim text.