US3922216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of light ends
Assignee: Texaco Inc
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Filing: 1974-05-29
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Granted: 1975-11-25
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Expires: 1994-05-29
Abstract
Abstract Petrochemical feedstocks such as ethylene may be prepared from heavier hydrocarbon stock such as gas oils with simultaneous production of alkylate gasolines.
Inventors
- 👤 Raymond F Wilson
- 👤 John H Estes
- 👤 Stanley Kravitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:15
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/04; C10L1/06; C10G; C10G55/00; C10G55/02; C10G55/06; C10G9/00; C10G9/34; C10G9/36; C10G2400/00; C10G2400/20
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
67 words
THE METHOD WHICH COMPRISES THERMALLY STEAM CRACKING, IN THE PRESENCE OF STEAM AT THERMAL STEAM CRACKING CONDITIONS, A HYDROCARBON THERMAL STEAM CRACKING CHARGE STREAM INCLUYDING (I) A HYDROCARBON COMPONENT CONTAINING AT LEAST ABOUT 9 CARBON ATOMS AND (II) DEIOSOBURANIZED C3 TO C5 PRAFFIN STREAM WHEREBY FORMING A PRODUCT STREAM CONTAINING (I) AN ETHYLENE FRACTION AND (ii9 A C3 TO C4 OLEFIN FRACTION; AND RECOVERING SAID PRODUCT STREAM.
Claim 2
Independent Claim
67 words
THE METHOD WHICH COMPRISES THERMALLY STEAM CRACKING, IN THE PRESENCE OF STEAM AT THERMAL STEAM CRACKING CONDITIONS, A HYDROCARBON THERMAL STEAM CRACKING CHARGE STREAM INCLUYDING (I) A HYDROCARBON COMPONENT CONTAINING AT LEAST ABOUT 9 CARBON ATOMS AND (II) DEIOSOBURANIZED C3 TO C5 PRAFFIN STREAM WHEREBY FORMING A PRODUCT STREAM CONTAINING (I) AN ETHYLENE FRACTION AND (ii9 A C3 TO C4 OLEFIN FRACTION; AND RECOVERING SAID PRODUCT STREAM.
Claim 3
Dependent Claim
20 words
The method of claim 1 wherein said hydrocarbon component containing at least about 9 carbon atoms comprises a gas oil.
Claim 4
Dependent Claim
30 words
The method of claim 1, wherein said hydrocarbon component containing at least about 9 carbon atoms comprises a gas oil which has been contacted with isomerizing-cracking catalyst at isomerizing-cracking conditions.
Claim 5
Dependent Claim
42 words
The method of claim 1, wherein said hydrocarbon component containing at least about 9 carbon atoms comprises a gas oil which has been contacted with isomerizing-cracking catalyst at isomerizing-cracking conditions and stripped of hydrocarbon components having less than about 9 carbon atoms.
Claim 6
Dependent Claim
33 words
The method of claim 1 wherein the molar ratio of (i) said hydrocarbon stream containing at least about 9 carbon atoms to (ii) said deisobutanized C3 to C5 stream is 0.1 - 5:1.
Claim 7
Dependent Claim
33 words
The method of claim 1 wherein the molar ratio of (i) said hydrocarbon stream containing at least about 9 carbon atoms to (ii) said deisobutanized C3 to C5 stream is 0.2 - 2:1.
Claim 8
Dependent Claim
26 words
The method of claim 1 wherein said C3 to C4 olefin fRaction is alkylated with an isobutane-containing stream thereby forming alkylate; and said alkylate is recovered.
Claim 9
Independent Claim
112 words
The method which comprises deisobutanizing a hydrocarbon fraction containing less than six carbon atoms thereby forming (i) an isobutanecontaining stream, (ii) a C4 and lighter stream, and (iii) a C5 and heavier stream; combining said C4 and lighter stream and said C5 and heavier stream thereby forming a deisobutanized stream; combining said deisobutanized stream and a hydrocarbon component stream containing at least about 9 carbon atoms thereby forming a thermal steam cracking charge stream; thermally steam cracking in the presence of steam at thermal steam cracking conditions, said thermal steam cracking charge stream thereby forming (i) an ethylene fraction and (ii) a C3 to C4 olefin fraction; and recovering said ethylene fraction.
Claim 10
Independent Claim
112 words
The method which comprises deisobutanizing a hydrocarbon fraction containing less than six carbon atoms thereby forming (i) an isobutanecontaining stream, (ii) a C4 and lighter stream, and (iii) a C5 and heavier stream; combining said C4 and lighter stream and said C5 and heavier stream thereby forming a deisobutanized stream; combining said deisobutanized stream and a hydrocarbon component stream containing at least about 9 carbon atoms thereby forming a thermal steam cracking charge stream; thermally steam cracking in the presence of steam at thermal steam cracking conditions, said thermal steam cracking charge stream thereby forming (i) an ethylene fraction and (ii) a C3 to C4 olefin fraction; and recovering said ethylene fraction.
Claim 11
Dependent Claim
15 words
The method of claim 8 wherein saaid thermal steam cracking conditions include temperature of 1,200*F-1,600*F.
Claim 12
Dependent Claim
26 words
The method of claim 8 wherein said C3 to C4 olefin fraction is alkylated with an isobutane-containing stream thereby forming alkylate; and said alkylate is recovered.
Claim 13
Dependent Claim
25 words
The method of claim 8 wherein said C3 to C6 olefin fraction is alkylated with said isobutane-containing stream thereby forming alkylate; and recovering said alkylate.
Claim 14
Independent Claim
190 words
The method which comprises passing a charge petroleum hydrocarbon containing at least about 9 carbon atoms into contact with an isomerizing-cracking catalyst at isomerizing-cracking conditions in the presence of hydrogen thereby forming an isomerized-cracked stream containing (i) an uncracked oil fraction and (ii) a light fraction containing isobutane; distilling said isomerized-cracked stream thereby recovering (i) an uncracked oil fraction (ii) fraction containing less than 6 carbon atoms, and (iii) a gasoline fraction; separating said fraction containing less than 6 carbon atoms into (i) an isobutane-containing stream, (ii) a C4 and lighter stream, and (iii) a C5 and heavier stream; combining said C4 and lighter stream and said C5 and heavier stream thereby forming a deisobutanized stream; combining said deisobutanized stream and said uncracked oil fraction thereby forming a thermal steam cracking charge stream; thermally steam cracking said thermal steam cracking charge stream in the presence of steam thereby forming a thermally steam cracked product stream containing (i) an ethylene fraction and (ii) a C3 to C4 olefin fraction; withdrawing said ethylene fraction; alkylating said C3 to C4 olefin fraction with said isobutane-containing stream thereby forming alkylate; and withdrawing said alkylate.
Claim 15
Independent Claim
190 words
The method which comprises passing a charge petroleum hydrocarbon containing at least about 9 carbon atoms into contact with an isomerizing-cracking catalyst at isomerizing-cracking conditions in the presence of hydrogen thereby forming an isomerized-cracked stream containing (i) an uncracked oil fraction and (ii) a light fraction containing isobutane; distilling said isomerized-cracked stream thereby recovering (i) an uncracked oil fraction (ii) fraction containing less than 6 carbon atoms, and (iii) a gasoline fraction; separating said fraction containing less than 6 carbon atoms into (i) an isobutane-containing stream, (ii) a C4 and lighter stream, and (iii) a C5 and heavier stream; combining said C4 and lighter stream and said C5 and heavier stream thereby forming a deisobutanized stream; combining said deisobutanized stream and said uncracked oil fraction thereby forming a thermal steam cracking charge stream; thermally steam cracking said thermal steam cracking charge stream in the presence of steam thereby forming a thermally steam cracked product stream containing (i) an ethylene fraction and (ii) a C3 to C4 olefin fraction; withdrawing said ethylene fraction; alkylating said C3 to C4 olefin fraction with said isobutane-containing stream thereby forming alkylate; and withdrawing said alkylate.
Claim 16
Dependent Claim
28 words
The method of claim 12 wherein the molar ratio of said deisobutanized stream and said uncracked oil fraction in said thermal steam cracking charge stream is 0.1- 5:1.
Claim 17
Dependent Claim
29 words
The method of claim 12 wherein the molar ratio of said deisobutanized stream and said uncracked oil fraction in said thermal steam cracking charge stream is 0.5 - 3:1.
Claim 18
Dependent Claim
15 words
The method of claim 12 wherein said thermal steam cracking is carried out at 1,200*F-1,600*F.
Claim 19
Dependent Claim
13 words
The method of claim 12 wherein said isomerizing-cracking is carried out at 2,75*F-375*F.
Claim 20
Dependent Claim
16 words
The method of claim 12 wherein said charge petroleum hydrocarbon to isomerizing-cracking is a gas oil.
Claim 21
Dependent Claim
17 words
The method of claim 12 wherein said charge petroleum hydrocarbon to isomerizing-cracking is a desulfurized gas oil.
Claim 22
Independent Claim
214 words
The method which comprises passing a charge gas oil into contact with an isomerizing-cracking catalyst at isomerizing-cracking conditions including temperature of 275*F-375*F in the presence of hydrogen thereby forming an isomerized-cracked stream containIng (i) a light fraction containing isobutane, (ii) a C6 to C8 gasoline fraction, and (iii) a heavier than gasoline fraction including uncracked charge gas oil; distilling said isomerized-cracked stream thereby recovering (i) a light fraction containing isobutane, (ii) a C6 to C8 gasoline fraction, and (iii) a heavier than gasoline fraction including uncracked gas oil; separating said fraction containing less than 6 carbon atoms into (i) an isobutane-containing stream, (ii) a C4 and lighter stream, and (iii) a C5 and heavier stream; combining said C4 and lighter stream and said C5 and heavier stream thereby forming a deisobutanized stream; combining said heavier than gasoline fraction and said deisobutanized stream in mole ratio of 0.1 -10:1 thereby forming a thermal steam cracking charge stream; thermally steam cracking said thermal steam cracking charge in the presence of steam at 1,200*F-1,600*F thereby forming a thermally steam cracked product stream containing (i) an ethylene fraction and (ii) a C3 to C4 olefin fraction; withdrawing said ethylene fraction; alkylating said C3 to C4 olefin fraction with said isobutane-containing stream thereby forming alkylate; and withdrawing said alkylate.
Claim 23
Independent Claim
214 words
The method which comprises passing a charge gas oil into contact with an isomerizing-cracking catalyst at isomerizing-cracking conditions including temperature of 275*F-375*F in the presence of hydrogen thereby forming an isomerized-cracked stream containIng (i) a light fraction containing isobutane, (ii) a C6 to C8 gasoline fraction, and (iii) a heavier than gasoline fraction including uncracked charge gas oil; distilling said isomerized-cracked stream thereby recovering (i) a light fraction containing isobutane, (ii) a C6 to C8 gasoline fraction, and (iii) a heavier than gasoline fraction including uncracked gas oil; separating said fraction containing less than 6 carbon atoms into (i) an isobutane-containing stream, (ii) a C4 and lighter stream, and (iii) a C5 and heavier stream; combining said C4 and lighter stream and said C5 and heavier stream thereby forming a deisobutanized stream; combining said heavier than gasoline fraction and said deisobutanized stream in mole ratio of 0.1 -10:1 thereby forming a thermal steam cracking charge stream; thermally steam cracking said thermal steam cracking charge in the presence of steam at 1,200*F-1,600*F thereby forming a thermally steam cracked product stream containing (i) an ethylene fraction and (ii) a C3 to C4 olefin fraction; withdrawing said ethylene fraction; alkylating said C3 to C4 olefin fraction with said isobutane-containing stream thereby forming alkylate; and withdrawing said alkylate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |