US4459371A
Expired / Lapsed
US
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FCC Sulfur oxide acceptor
Assignee: Honeywell UOP LLC
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Filing: 1983-11-03
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Granted: 1984-07-10
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Expires: 2003-11-03
Abstract
Abstract An FCC sulfur oxide acceptor, its method of manufacture and use in the FCC process. The acceptor, a particulate solid containing magnesium, sodium and aluminum, the precursor of which comprises a mixture of precipitates. One precipitate is a compound of aluminum and another is a compound of magnesium. The precipitates are simultaneously precipitated from a common solution in which they have a highly limited solubility.
Inventors
- 👤 Simon H. Hobbs
- 👤 Edward S. Rogers
- 👤 George J. Antos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 18:46
CPC Classifications
C; C10; C10G; C10G11/00; C10G11/02; C10G11/04; C10G11/05; B; B01; B01J; B01J20/00; B01J20/02; B01J20/04; B01J20/041; B01J20/06; B01J20/08; B01J20/28; B01J20/28002; B01J20/28004; B01J20/30; B01J20/3078; Y; Y10; Y10S; Y10S502/00; Y10S502/515; Y10S502/517
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
95 words
A sulfur oxide acceptor comprising a particulate solid containing magnesium, sodium and aluminum, said acceptor comprising 0.10 wt % to about 5.0 wt % sodium on an elemental basis, 10 wt % to about 30 wt % magnesium on an elemental basis, the precursor of said acceptor comprising a mixture of precipitates comprising compounds of magnesium and aluminum, which contain compounds of sodium, said precipitates having been simultaneously precipitated at a pH of about 8.0 or above from a common solution comprising magnesium, aluminum and sodium, in which said precipitates have a highly limited solubility.
Claim 2
Dependent Claim
95 words
A sulfur oxide acceptor comprising a particulate solid containing magnesium, sodium and aluminum, said acceptor comprising 0.10 wt % to about 5.0 wt % sodium on an elemental basis, 10 wt % to about 30 wt % magnesium on an elemental basis, the precursor of said acceptor comprising a mixture of precipitates comprising compounds of magnesium and aluminum, which contain compounds of sodium, said precipitates having been simultaneously precipitated at a pH of about 8.0 or above from a common solution comprising magnesium, aluminum and sodium, in which said precipitates have a highly limited solubility.
Claim 3
Dependent Claim
19 words
The acceptor of claim 1 wherein said acceptor comprises the oxides of sodium and magnesium in an alumina matrix.
Claim 4
Dependent Claim
22 words
The acceptor of claim 2 wherein said acceptor comprises particles in the size range of from about 20 to about 150 microns.
Claim 5
Independent Claim
106 words
A method of manufacturing a sulfur oxide acceptor comprising sodium and magnesium ions in a alumina matrix, said acceptor comprising 0.10 wt % to about 5.0 wt % sodium, on an elemental basis, 10 wt % to about 30 wt % magnesium on an elemental basis, substantially all of the balance of the composition comrising alumina, which method comprises effecting the simultaneous precipitation with a precipitating agent at a pH of about 8.0 or above from a common aqueous solution comprising magnesium aluminum and sodium compounds of magnesium and aluminum which contain compounds of sodium in which solution the precipitated compounds have a highly limited solubility.
Claim 6
Independent Claim
106 words
A method of manufacturing a sulfur oxide acceptor comprising sodium and magnesium ions in a alumina matrix, said acceptor comprising 0.10 wt % to about 5.0 wt % sodium, on an elemental basis, 10 wt % to about 30 wt % magnesium on an elemental basis, substantially all of the balance of the composition comrising alumina, which method comprises effecting the simultaneous precipitation with a precipitating agent at a pH of about 8.0 or above from a common aqueous solution comprising magnesium aluminum and sodium compounds of magnesium and aluminum which contain compounds of sodium in which solution the precipitated compounds have a highly limited solubility.
Claim 7
Dependent Claim
60 words
The method of claim 4 wherein said common aqueous solution is obtained by blending a first solution containing magnesium ions and a second solution containing aluminum ions, at least one of said first and second solutions also containing sodium ions, into a third solution containing said precipitating agent, whereby said simultaneous precipitation commences upon formation of said common aqueous solution.
Claim 8
Dependent Claim
61 words
A method of claim 4 wherein said common aqueous solution is obtained by blending together a first solution containing magnesium ions and a second solution containing aluminum ions, at least one of said first and second solutions, also containing sodium ions, said common aqueous solution then being mixed with a third solution containing said precipitating agent, thereby effecting said simultaneous precipitation.
Claim 9
Dependent Claim
32 words
The method of claim 4 wherein said precipitating agent is alkaline and said precipitating conditions include a pH in excess of 8.0 and a temperature and pressure sufficient to maintain liquid phase.
Claim 10
Dependent Claim
21 words
The method of claim 7 wherein said precipitating agent comprises a carbonate, a pyrophosphate, a metaborate, an oxalate, or a fluoride.
Claim 11
Dependent Claim
14 words
The method of claim 8 wherein the cation of said precipitating agent comprises ammonium.
Claim 12
Dependent Claim
17 words
The method of claim 4 wherein the precipitate is removed from its supernatant liquor, dried and calcined.
Claim 13
Dependent Claim
25 words
The method of claim 10 wherein drying and calcination is effected by spray drying the precipitate at a temperature in excess of about 1100° F.
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) | 1987-07-10 | 1988-01-09 | 1988-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-10 | 1992-01-09 | 1992-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-10 | 1996-01-09 | 1996-07-10 | $7700.00 | Window Closed / Lapsed |