US3609099A
Expired / Lapsed
US
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Method of activating impregnated catalyst
Assignee: Union Oil Company of California
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Filing: 1969-09-08
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Granted: 1971-09-28
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Expires: 1989-09-08
Abstract
Abstract Composites formed by the impregnation of refractory oxide supports with thermally decomposable salts of catalytically active metals are activated to produce highly active catalysts by heating the composites at a controlled rate to the prescribed calcination temperature while intimately contacting the composites with at least about 1 and preferably at least about 2 s.c.f.m. of injected air per pound of composite having an initial temperature below about 500* F.
Inventors
- 👤 Grant A Mickelson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:44
CPC Classifications
C; C10; C10G; C10G49/00; C10G49/02; C10G49/04; B; B01; B01J; B01J37/00; B01J37/12; B01J37/14
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
51 words
The method of claim 1 wherein said composite comprises at least about 1 weight percent of at least one compound of at least one metal selected from Groups VI and VIII of the Periodic Chart convertible to the corresponding metal oxide upon exposure to said oxidizing gas at said calcination temperature.
Claim 2
Dependent Claim
71 words
The method of claim 1 wherein said composite is formed on impregnation of a foraminous support with a catalytic amount of at least one thermally decomposable water-soluble compound of the Group VI and VIII metals, convertible to the corresponding metal oxide upon exposure to said oxidizing gas at said calcination temperature, and said composite is heated to said calcination temperature at a rate of less than about 400* F. per hour.
Claim 3
Dependent Claim
69 words
The method of claim 1 wherein said composite is formed by impregnation of a foraminous support with the aqueous system which forms upon mixing water and at least one of ammonium dimolybdate, ammonium phosphomolybdates, ammonium heptamolybdate, molybdic acid, molybdenum oxide, molybdenum blue and iron Group VIII metal complex molybdates and phosphomolybdates, and at least one of the nitrates, sulfates, halides, carbonates, hydrates and acetates of the Group VIII metals.
Claim 4
Dependent Claim
39 words
The method of claim 1 wherein said composite is formed on impregnation of a foraminous support with an aqueous solution of ammonium heptamolybdate and at least one of the nitrates, sulfates, fluorides, chlorides and bromides of nickel and cobalt.
Claim 5
Dependent Claim
16 words
The method of claim 5 wherein said solution further comprises at least one acid of phosphorous.
Claim 6
Independent Claim
131 words
The method of thermally activating a composite of a foraminous carrier and at least one of the nitrates, sulfates, halides, carbonates and acetates of at least one cation selecTed from ammonium and the metals of Group VI and VIII, ammonium molybdate, ammonium tungstate, ammonium chromate, molybdic acid, tungstic acid, chromic acid and molybdenum blue, including the steps of drying said composite, gradually increasing the temperature of the resultant dried composite to a calcination temperature within the range of about 800* to about 1,300* F. sufficient to thermally activate said composite and intimately contacting said composite during at least that portion of said calcination during which said compounds are decomposed with at least about 2 s.c.f.m. of an oxidizing gas per pound of said composite injected into intimate contact with said composite.
Claim 7
Dependent Claim
103 words
The method of claim 7 wherein said foraminous carrier is selected from alumina, silica, silica-stabilized alumina and aluminosilicates, said composite comprises about 1 to about 20 weight percent of at least one of the sulfates and nitrates of iron, cobalt and nickel, said composite is dried at a temperature within the range of about 180* to about 350* F. for at least about 10 minutes sufficient to reduce the physisorbed water content thereof to about 4 percent or less and said composite is calcined by heating the same to said calcination temperature at a rate of less than about 400 F.* per hour.
Claim 8
Dependent Claim
41 words
The method of claim 8 wherein said composite is contacted with about 3 to about 50 s.c.f.m. of said gas per pound of said composite during the period in which the temperature of said composite is increased to said calcination temperature.
Claim 9
Independent Claim
112 words
The method of thermally activating a composite formed by the impregnation of a foraminous support with an aqueous system which forms on admixing water and at least one of ammonium heptamolybdate, molybdic acid, molybdenum trioxide and molybdenum blue and at least one salt of a Group VIII metal base and a strong mineral acid, which comprises contacting said composite at a calcination temperature of at least about 800* F. and intimately contacting said composite with an oxidizing gas having an initial temperature prior to contact with said composite of less than about 500* F. at a rate of at least about 2 s.c.f.m. of said oxidizing gas per pound of said composite.
Claim 10
Dependent Claim
57 words
The method of claim 10 wherein said composite is formed by impregnation of a foraminous support with the solution which forms on admixing water and at least about 10 weight percent of ammonium heptamolybdate and at least about 1 weight percent of at least one of the nitrates, sulfates, fluorides, chlorides and bromides of nickel and cobalt.
Claim 11
Dependent Claim
24 words
The method of claim 11 wherein said solution further comprises at least one acid of phosphorus selected from orthophosphoric, metaphosphoric, pyrophosphoric and phosphorous acids.
Claim 12
Dependent Claim
98 words
A continuous method for thermally activating a composite of a foraminous support and at least one thermally decomposable compound of the metals of Groups VI and VIII, including the steps of substantially continuously passing said composite to a heating zone substantially continuously removing thermally activated composite from said heating zone and heating said composite in said zone to a temperature of at least about 800* F. while intimately contacting said composite with an oxidizing gas at a rate of at least about 1 s.c.f.m. of said oxidizing gas per pound of said composite retained in said heating zone.
Claim 13
Dependent Claim
37 words
The method of claim 13 wherein said continuous heating zone is a rotary calciner and said composite is contacted with said oxidizing gas at a rate of at least about 2 s.c.f.m. per pound of said composite.
Claim 14
Dependent Claim
103 words
The method of claim 13 wherein said composite comprises at least one of the nitrates, sulfates, halides, carbonates and acetates of at least one cation selected from ammonium and the metals of Groups VI and VIII, ammonium molybdate, ammonium tungstate, ammonium chromate, molybdic acid, tungstic acid, chromic acid and molybdenum blue, said composite is heated to a temperature within the range of about 800* to about 1,300* F. sufficient to thermally decompose said thermally decomposable compound while intimately contacting said composite with said oxidizing at a rate of at least about 2 s.c.f.m. per pound of said composite retained in said heating zone.
Claim 15
Dependent Claim
44 words
The method of claim 14 wherein the average bed depth of said composite within said rotary calciner is less than about 8 inches and said oxidizing gas has an initial temperature of less than about 300* F. prior to contacting in said heating zone.
Claim 16
Dependent Claim
64 words
The method of claim 1 wherein said composite comprises at least about 1 weight percent of at least one compound of the metals of Groups VI and VIII convertible to the corresponding metal oxide upon exposure to said oxidizing gas at said calcination temperature and the initial temperature of said oxidizing gas prior to contact with said composite is less than about 500* F.
Claim 17
Dependent Claim
47 words
The method of claim 7 wherein the initial temperature of said oxidizing gas prior to contact with said composite is at least 20* F. lower than the temperature of said composite during at least that portion of said activation during which said metal compounds are thermally decomposed.
Claim 18
Dependent Claim
68 words
The method of claim 13 wherein said heating zone is a rotary calciner and said composite is contacted with said oxidizing gas at a rate of at least about 2 s.c.f.m./min. of said gas per pound of said composite retained in said heating zone and said oxidizing gas has an initial temperature of less than about 500* F. prior to contact with said composite in said heating zone.
References Cited (Backward Citations)
US3232887A
Cited
US3287280A
Cited
US3474041A
Cited
US3459678A
Cited
US3420771A
Cited
US3471399A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |