US4390416A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catalytic cracking of hydrocarbons
Assignee: WR Grace and Co Conn
•
Filing: 1981-12-07
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Granted: 1983-06-28
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Expires: 2001-12-07
Abstract
Abstract Nitrogen containing hydrocarbon feedstocks are catalytically cracked in the presence of an acid. The acid is combined with the feedstock immediately prior to contact with a cracking catalyst in the riser section of a fluid catalytic cracking unit.
Inventors
- 👤 Ronald E. Ritter
- 👤 Donald S. Henderson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:33
CPC Classifications
C; C10; C10G; C10G11/00; C10G55/00; C10G55/02; C10G55/06
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
73 words
In a method for the catalytic cracking of nitrogen containing hydrocarbon feedstocks wherein the feedstock is contacted with a catalyst under catalytic cracking conditions at elevated temperatures, the improvement comprising adding to said feedstock immediately prior to contact with said catalyst an amount of acid selected from the group consisting of sulfuric, hydrochloric, nitric, phosphoric and acetic acids sufficient to neutralize a substantial portion of the basic nitrogen components contained in said feedstock.
Claim 2
Dependent Claim
73 words
In a method for the catalytic cracking of nitrogen containing hydrocarbon feedstocks wherein the feedstock is contacted with a catalyst under catalytic cracking conditions at elevated temperatures, the improvement comprising adding to said feedstock immediately prior to contact with said catalyst an amount of acid selected from the group consisting of sulfuric, hydrochloric, nitric, phosphoric and acetic acids sufficient to neutralize a substantial portion of the basic nitrogen components contained in said feedstock.
Claim 3
Dependent Claim
24 words
The method of claim 1 wherein said acid is added in amounts sufficient to neutralize at least 50 percent of the basic nitrogen components.
Claim 4
Dependent Claim
24 words
The method of claim 1 wherein said acid is combined with steam which is mixed with the feedstock prior to contact with said catalyst.
Claim 5
Dependent Claim
36 words
The method of claim 1 wherein said feedstock contains at least 0.05 weight percent basic nitrogen and from about 0.1 to 5 weight percent (based on total oil feed) acid is added to achieve neutralization thereof.
Claim 6
Dependent Claim
18 words
The method of claim 1 wherein said catalyst comprises a crystalline zeolite dispersed in an inorganic oxide matrix.
Claim 7
Dependent Claim
15 words
The method of claim 5 wherein said zeolite comprises rare earth exchanged type Y zeolite.
Claim 8
Dependent Claim
33 words
The method of claim 5 wherein said inorganic oxide matrix is selected from the group consisting of silica, alumina, silica-alumina, silica magnesia hydrogels, silica sols, silica-alumina sols, alumina sols, clay and mixtures thereof.
Claim 9
Dependent Claim
20 words
The method of claim 5 wherein said catalyst includes from about 0.1 to 10 parts per million platinum and palladium.
Claim 10
Dependent Claim
33 words
The method of claim 5 wherein said catalyst contains from about 1 to 30 percent by weight of an SOx control agent selected from the group consisting of alumina, and rare-earth alumina composites.
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) | 1986-06-27 | 1986-12-27 | 1987-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-27 | 1990-12-27 | 1991-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-27 | 1994-12-27 | 1995-06-28 | $7700.00 | Window Closed / Lapsed |