US3929620A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocracking catalyst and process
Assignee: WR Grace and Co Conn
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Filing: 1974-12-04
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Granted: 1975-12-30
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Expires: 1994-12-04
Abstract
Abstract A process for hydrocracking hydrocarbon stocks by contacting such stocks under hydrocracking conditions with a nickel oxidetungsten oxide catalyst distended on an ultrastable faujasite base that has been exchanged to incorporate chromium oxide therein. The use of this catalyst allows the refiner to hydrocrack feedstocks that contain large quantities of sulphur and nitrogen compounds. The use of the specially prepared chromium zeolite base also increases the life of the catalyst.
Inventors
- 👤 R Parthasarathy
- 👤 Julius Scherzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:12
CPC Classifications
C; C10; C10G; C10G47/00; C10G47/02; C10G47/10; C10G47/12; C10G47/16; C10G47/20; B; B01; B01J; B01J29/00; B01J29/04; B01J29/06; B01J29/08; B01J29/16
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
110 words
A METHOD OF HYDROCRACKING A HYDROCARBON FEED STOCK TO OBTAIN LOWER BOILING HYDROCARBONS WHICH COMPRISES SUBJECTING SAID FEEDSTOCK TO HYDROCRACKING CONDITIONS IN THE PRESENCE OF A CATALYST, SAID CATALYST CONSISTING OF ABOUT 0.1 TO 10 WT. PERCE CENT NICKEL OXIDE, 10 TO 25 WT. PERCENT TUNGSTEN OXIDE OF LESS FROM 5 TO 80% OF A CHROMIUM CONTANING ULTRASTABLE ZEOLITE HAVING AN ALKALI METAL CONTANT EXPRESSED AS THE OXIDE OF LESS THAN 1 PERCENT, A CUBIC UNIT CELL OF FROM 2.20 TO 24.45 ANGSTROMS AND AN ULTRASTABLE STRUCTURE AS EVIDENCE BY RETENTION OF A SURFACE AREA OF GREATER THAN 150 M2/G. AFTER CALCINATION OF A TEMPERATURE OF 1725*F. FOR 2 HOURS.
Claim 2
Independent Claim
110 words
A METHOD OF HYDROCRACKING A HYDROCARBON FEED STOCK TO OBTAIN LOWER BOILING HYDROCARBONS WHICH COMPRISES SUBJECTING SAID FEEDSTOCK TO HYDROCRACKING CONDITIONS IN THE PRESENCE OF A CATALYST, SAID CATALYST CONSISTING OF ABOUT 0.1 TO 10 WT. PERCE CENT NICKEL OXIDE, 10 TO 25 WT. PERCENT TUNGSTEN OXIDE OF LESS FROM 5 TO 80% OF A CHROMIUM CONTANING ULTRASTABLE ZEOLITE HAVING AN ALKALI METAL CONTANT EXPRESSED AS THE OXIDE OF LESS THAN 1 PERCENT, A CUBIC UNIT CELL OF FROM 2.20 TO 24.45 ANGSTROMS AND AN ULTRASTABLE STRUCTURE AS EVIDENCE BY RETENTION OF A SURFACE AREA OF GREATER THAN 150 M2/G. AFTER CALCINATION OF A TEMPERATURE OF 1725*F. FOR 2 HOURS.
Claim 3
Dependent Claim
21 words
The method according to claim 1, wherein the ultrastable zeolite contains from about 1 to 3 percent chromia expressed as Cr2O3.
Claim 4
Dependent Claim
24 words
The method according to claim 1, wherein the chromium is exchanged into the ultrastable zeolite and the tungsten and nickel oxides are impregnated therein.
Claim 5
Independent Claim
114 words
A method of hydrocracking a hydrocarbon feedstock containing large amounts of sulfur and nitrogen components to obtain lower boiling hydrocarbons which comprises subjecting said feedstock to hydrocracking conditions in the presence of a catalyst, said catalyst consisting of about 0.1 to 10 wt. percent of nickel oxide aNd 10 to 25 wt. percent tungsten oxide and 5 to 80% of a chromium containing ultrastable zeolite having an alkali metal content of less than 1 percent, a cubic unit cell of 24.20 to 24.45 angstroms and an ultrastable structure as evidenced by retention of a surface area of greater than 150 m2/g. after calcination at a temperature of 1725*F. for a period of 2 hours.
Claim 6
Independent Claim
114 words
A method of hydrocracking a hydrocarbon feedstock containing large amounts of sulfur and nitrogen components to obtain lower boiling hydrocarbons which comprises subjecting said feedstock to hydrocracking conditions in the presence of a catalyst, said catalyst consisting of about 0.1 to 10 wt. percent of nickel oxide aNd 10 to 25 wt. percent tungsten oxide and 5 to 80% of a chromium containing ultrastable zeolite having an alkali metal content of less than 1 percent, a cubic unit cell of 24.20 to 24.45 angstroms and an ultrastable structure as evidenced by retention of a surface area of greater than 150 m2/g. after calcination at a temperature of 1725*F. for a period of 2 hours.
Claim 7
Dependent Claim
19 words
The method according to claim 4, wherein the ultrastable zeolite contains 1 to 3 percent chromia expressed as Cr2O3.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-12-29 | 1979-06-30 | 1979-12-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-29 | 1983-06-30 | 1983-12-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-29 | 1987-06-30 | 1987-12-30 | $7700.00 | Window Closed / Lapsed |