US3873439A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the simultaneous production of an aromatic concentrate and isobutane
Assignee: Universal Oil Products Co
•
Filing: 1973-02-26
•
Granted: 1975-03-25
•
Expires: 1993-02-26
Abstract
Abstract A naphtha boiling range hydrocarbon charge stock is converted into an aromatic concentrate and isobutane via a process combining a catalytic reforming zone and a hydrocracking zone. The catalytic reforming is effected at reforming conditions selected to convert paraffinic hydrocarbons containing more than five carbon atoms per molecule into aromatic hydrocarbons. The reforming zone effluent is then subjected to a particular hydrocracking process which results in exceedingly high yields of isobutane.
Inventors
- 👤 Ernest L Pollitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:50
CPC Classifications
C; C10; C10G; C10G59/00; C10G59/02; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; C10G47/18; C10G69/00; C10G69/02; C10G69/08; C10L; C10L1/00; C10L1/04; C10L1/06
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A PROCESS FOR THE SIMULTANEOUS PRODUCTION OF AN AROMATIC CONCENTRATE AND ISOBUTANE, FROM A NAPHTHA BOILING RANGE CHARGE STOCK, WHICH PROCESS COMPRISES THE STEPS OF: A. REACTING SAID CHARGE STOCK, IN A LOW-SEVERITY CATALYTIC REFORMING ZONE, AT REFORMING CONDITIONS INCLUDING GREATER THAN ABOUT 90 MOL PERCENT CONVERSION OF NAPHTHENESE TO AROMATIC AND LESS THAN ABOUT 40 MOL PERCENT CONVERSION OF PARAFFINS TO AROMATICS, TO PRODUCE A REFORMATE CONTAINING AROMATIC AND PARAFFIN HYDROCARBONS; B. FURTHER REACTING AT LEAST A PORTION OF THE RESULTING REFORMED PRODUCT EFFLUENT WITH HYDROGEN, IN A HYDROCRACKING REACTION ZONE, AT HYDROCRACKING CONDITIONS AND IN CONTACT WITH A HYDROCRACKING CATALYST COMPRISING A MORDENITE CARRIER MATERIAL, A PALLADIUM COMPONENT AND A NICKEL COMPONENT TO FORM ISOBUTANE; AND, C. RECOVERING SAID AROMATIC CONCENTRATE AND ISOBUTANE FROM THE RESULTING HYDROCRACKING REACTION ZONE EFFLUENT.
Claim 2
Dependent Claim
132 words
A PROCESS FOR THE SIMULTANEOUS PRODUCTION OF AN AROMATIC CONCENTRATE AND ISOBUTANE, FROM A NAPHTHA BOILING RANGE CHARGE STOCK, WHICH PROCESS COMPRISES THE STEPS OF: A. REACTING SAID CHARGE STOCK, IN A LOW-SEVERITY CATALYTIC REFORMING ZONE, AT REFORMING CONDITIONS INCLUDING GREATER THAN ABOUT 90 MOL PERCENT CONVERSION OF NAPHTHENESE TO AROMATIC AND LESS THAN ABOUT 40 MOL PERCENT CONVERSION OF PARAFFINS TO AROMATICS, TO PRODUCE A REFORMATE CONTAINING AROMATIC AND PARAFFIN HYDROCARBONS; B. FURTHER REACTING AT LEAST A PORTION OF THE RESULTING REFORMED PRODUCT EFFLUENT WITH HYDROGEN, IN A HYDROCRACKING REACTION ZONE, AT HYDROCRACKING CONDITIONS AND IN CONTACT WITH A HYDROCRACKING CATALYST COMPRISING A MORDENITE CARRIER MATERIAL, A PALLADIUM COMPONENT AND A NICKEL COMPONENT TO FORM ISOBUTANE; AND, C. RECOVERING SAID AROMATIC CONCENTRATE AND ISOBUTANE FROM THE RESULTING HYDROCRACKING REACTION ZONE EFFLUENT.
Claim 3
Dependent Claim
24 words
The process of claim 1 further characterized in that said reformed product effluent is reacted in said hydrocracking reaction zone without intermediate separation thereof.
Claim 4
Dependent Claim
31 words
The process of claim 1 further characterized in that said hydrocracking catalyst comprises mordenite carrier material, containing alumina fixed in combination therewith, a sulfided palladium component and a sulfided nickel component.
Claim 5
Dependent Claim
29 words
The process of claim 3 further characterized in that said hydrocracking catalyst comprises a carrier material of alumina and from about 60% to about 90% by weight of mordenite.
Claim 6
Dependent Claim
47 words
The process of claim 1 further characterized in that said hydrocracking catalyst contains from about 0.01 percent to about 2 percent by weight of said palladium component and from about 0.01 percent to about 10 percent by weight of said nickel component, calculated as the elements thereof.
Claim 7
Dependent Claim
56 words
The process of claim 1 further characterized in that said hydrocracking conditions include a maximum catalyst bed temperature of from 650*F. to about 850*F., a pressure in the range of 150 to 1,000 psig., a liquid hourly space velocity of about 1.0 to about 10 and a hydrogen circulation rate of 3,000 to about 20,000 scf./Bbl.
Claim 8
Dependent Claim
21 words
The process of claim 1 further characterized in that said hydrocracking reaction zone effluent is separated to recover a pentane/hexane concentrate.
Claim 9
Dependent Claim
28 words
The process of claim 7 further characterized in that said pentane/hexane is reacted with hydrogen in a hydroisomerization reaction zone at isomerizing conditions selected to produce isomers thereof.
Claim 10
Dependent Claim
34 words
The process of claim 1 further characterized in that said isobutane is reacted with an olefinic hydrocarbon, in an alkylation reaction zone, at alkylating conditions selected to produce a normally liquid alkylated hydrocarbon stream.
Claim 11
Dependent Claim
27 words
The process of claim 9 further characterized in that said olefinic hydrocarbon is produced by dehydrogenating a propane/butane concentrate separately recovered from said hydrocracking reaction zone effluent.
References Cited (Backward Citations)
US3124523A
Cited
US3172834A
Cited
US2908628A
Cited
US2935544A
Cited
US3114696A
Cited
US3259564A
Cited
US3384570A
Cited
US3619412A
Cited
US3775298A
Cited
US3598724A
Cited
US3714023A
Cited
US3714022A
Cited
US3707460A
Cited
US3755140A
Cited
US3756940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-24 | 1978-09-23 | 1979-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-24 | 1982-09-23 | 1983-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-24 | 1986-09-23 | 1987-03-25 | $7700.00 | Window Closed / Lapsed |