US4251348A — Petroleum distillate upgrading process

Claim 1

Independent Claim 193 words

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° to 1200° F., through use of an upgrading process comprising, (i) producing a process stream containing a C 3 -C 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° to 800° 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.

Claim 2

Dependent Claim 193 words

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° to 1200° F., through use of an upgrading process comprising, (i) producing a process stream containing a C 3 -C 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° to 800° 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.

Claim 3

Dependent Claim 16 words

A process according to claim 1 wherein the process of Step (B) is a hydrocracking process.

Claim 4

Dependent Claim 20 words

A process according to claim 2 wherein the effluent from said hydrocracking process is the feed for said upgrading process.

Claim 5

Dependent Claim 18 words

A process according to claim 2 wherein said upgraded effluent stream is the feedstock for said hydrocracking process.

Claim 6

Dependent Claim 20 words

A process according to claim 2 wherein said upgrading process and said hydrocracking process are operated in a recycle mode.

Claim 7

Dependent Claim 37 words

A process according to claim 1 wherein the process of Step (B) is a reforming process and the feed for said reforming process is selected from the 180°-400° F. fraction, or portion thereof, of said upgraded effluent.

Claim 8

Dependent Claim 33 words

A process according to claim 1 wherein the catalyst of Step (A)(i) comprises a ZSM-5-type crystalline aluminosilicate zeolite composited with a porous inorganic matrix wherein said matrix is substantially free of hydrocracking activity.

Claim 9

Dependent Claim 145 words

A process for upgrading a petroleum distillate feed consisting essentially of hydrocarbons having a normal boiling point in the range of from about 180° F. to about 1200° F. and producing at least a substantial C 3 -C 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° to 800° 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.

Claim 10

Dependent Claim 145 words

A process for upgrading a petroleum distillate feed consisting essentially of hydrocarbons having a normal boiling point in the range of from about 180° F. to about 1200° F. and producing at least a substantial C 3 -C 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° to 800° 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.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1984-02-17	1984-08-18	1985-02-17	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1988-02-17	1988-08-18	1989-02-17	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1992-02-17	1992-08-18	1993-02-17	$7700.00	Window Closed / Lapsed

Petroleum distillate upgrading process

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