Patent US4650779A successfully refreshed from Google Patents.
US4650779A
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US
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Regeneration of pillared clays with gas containing a small amount of ammonia
Assignee: Mobil Oil AS
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Filing: 1985-07-15
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Granted: 1987-03-17
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Expires: 2005-07-15
Abstract
Abstract The useful life of a deactivated inorganic pillared clay catalyst or an inorganic pillared clay sorbent saturated with a steam-distillable organic sorbate is extended by adding a small amount of ammonia to the regeneration gas or to the regeneration steam.
Inventors
- 👤 Theodore P. Goldstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:55
CPC Classifications
B; B01; B01J; B01J29/00; B01J29/90
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
94 words
In the method for regenerating a deactivated inorganic acidic pillared clay catalyst that contains coke residue acquired during an acid catalyzed hydrocarbon reaction, said regeneration being effected by contacting said deactivated catalyst with an oxygen containing gas at elevated temperature under conditions effective to remove said coke residues, the improvement whereby forming regenerated catalyst with minimal loss of catalytic activity which comprises including in said regeneration gas from about 0.001 to 5.0 volume percent of gaseous ammonia and heating said regenerated catalyst in air or an inert gas under conditions effective to desorb ammonia.
Claim 2
Dependent Claim
94 words
In the method for regenerating a deactivated inorganic acidic pillared clay catalyst that contains coke residue acquired during an acid catalyzed hydrocarbon reaction, said regeneration being effected by contacting said deactivated catalyst with an oxygen containing gas at elevated temperature under conditions effective to remove said coke residues, the improvement whereby forming regenerated catalyst with minimal loss of catalytic activity which comprises including in said regeneration gas from about 0.001 to 5.0 volume percent of gaseous ammonia and heating said regenerated catalyst in air or an inert gas under conditions effective to desorb ammonia.
Claim 3
Dependent Claim
19 words
The method described in claim 1 wherein said hydrocarbon is a gas oil and said reaction is catalytic cracking.
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) | 1990-03-16 | 1990-09-15 | 1991-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-03-16 | 1994-09-15 | 1995-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-03-16 | 1998-09-15 | 1999-03-17 | $7700.00 | Window Closed / Lapsed |