Patent US3883442A successfully refreshed from Google Patents.
US3883442A
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Non-shrinking alumina-based catalyst compositions
Assignee: Union Oil Company of California
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Filing: 1973-12-26
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Granted: 1975-05-13
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Expires: 1993-12-26
Abstract
Abstract Preshaped forms, e.g., pellets, of high-surface-area alumina are impregnated with a solution of a boron compound which upon calcination yields B2O3, then dried and calcined at temperatures between about 675* and 1400*C. The resulting product has a moderately high surface area and pore volume, and undergoes substantially no shrinkage when utilized for catalytic purposes at temperatures up to about 1600*C. For catalytic purposes, the thus stabilized alumina forms may be utilized as such, or they may be impregnated with salts of catalytic metals and again calcined to yield supported catalysts of similar physical stability.
Inventors
- 👤 Dennis P Mcarthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:22
CPC Classifications
B; B01; B01J; B01J21/00; B01J21/02; B01J21/04
Claims Analysis
Total Claims: 33
Claim 1
Independent Claim
19 words
A METHOD FOR THE MANUFACTURE OF A SUPPORTED ACTIVE METAL CATALYST WHICH RESISTS SHRINKAGE AT HIGH TEMPERATURES, WHICH COMPRISES:
Claim 2
Independent Claim
19 words
A METHOD FOR THE MANUFACTURE OF A SUPPORTED ACTIVE METAL CATALYST WHICH RESISTS SHRINKAGE AT HIGH TEMPERATURES, WHICH COMPRISES:
Claim 3
Dependent Claim
31 words
IMPREGNATING PREFORMED, COHESIVE AGGREGATES OF AN ALUMINA HYDRATE OR TRANSITION ALUMINA SUPPORT WITH A SOLUTION OF A B2O3 PRECUSOR TO INCORPORATE THEREIN BETWEEN ABOUT 0.2 AND 25 WEIGHT-PERCENT OF B2O3 EQUIVALENT;
Claim 4
Dependent Claim
31 words
IMPREGNATING PREFORMED, COHESIVE AGGREGATES OF AN ALUMINA HYDRATE OR TRANSITION ALUMINA SUPPORT WITH A SOLUTION OF A B2O3 PRECUSOR TO INCORPORATE THEREIN BETWEEN ABOUT 0.2 AND 25 WEIGHT-PERCENT OF B2O3 EQUIVALENT;
Claim 5
Dependent Claim
66 words
calcining the impregnated support at a temperature between about 675* and 1500*C. for a time sufficient to decompose said B2O3 precursor and to substantially reduce thermal shrinkage of said support, but insufficient to reduce the surface area thereof to below about 5 m2/g, said calcination being carried out prior to the addition of any catalytic metal component capable of combining with B2O3 at said calcination temperature;
Claim 6
Dependent Claim
66 words
calcining the impregnated support at a temperature between about 675* and 1500*C. for a time sufficient to decompose said B2O3 precursor and to substantially reduce thermal shrinkage of said support, but insufficient to reduce the surface area thereof to below about 5 m2/g, said calcination being carried out prior to the addition of any catalytic metal component capable of combining with B2O3 at said calcination temperature;
Claim 7
Dependent Claim
14 words
A method as defined in claim 1 wherein said B2O3 precursor is boric acid.
Claim 8
Dependent Claim
57 words
calcining the impregnated support at a temperature between about 800* and 1200*C. for a time sufficient to decompose said B2O3 precursor and to substantially reduce thermal shrinkage of said support, but insufficient to reduce the surface area thereof to below about 5 m2/g, said calcination being carried out prior to the addition of any catalytic metal component;
Claim 9
Dependent Claim
57 words
calcining the impregnated support at a temperature between about 800* and 1200*C. for a time sufficient to decompose said B2O3 precursor and to substantially reduce thermal shrinkage of said support, but insufficient to reduce the surface area thereof to below about 5 m2/g, said calcination being carried out prior to the addition of any catalytic metal component;
Claim 10
Dependent Claim
66 words
CALCINING THE IMPREGNATED SUPPORT AT A TEMPERATURE BETWEEN ABOUT 675* AND 1500*C. FOR A TIME SUFFICIENT TO DECOMPOSE SAID B2O3 PRECURSOR AND TO SUBSTANTIALLY REDUCE THERMAL SHRINKAGE OF SAID SUPPORT, BUT INSUFFICIENT TO REDUCE THE SURFACE AREA THEREOF TO BELOW ABOUT 5 M2/G, SAID CALCINATION BEING CARRIED OUT PRIOR TO THE ADDITION OF ANY CATALYTIC METAL COMPONENT CAPABLE OF COMBINING WITH B2O3 AT SAID CALCINATION TEMPERATURE;
Claim 11
Dependent Claim
66 words
CALCINING THE IMPREGNATED SUPPORT AT A TEMPERATURE BETWEEN ABOUT 675* AND 1500*C. FOR A TIME SUFFICIENT TO DECOMPOSE SAID B2O3 PRECURSOR AND TO SUBSTANTIALLY REDUCE THERMAL SHRINKAGE OF SAID SUPPORT, BUT INSUFFICIENT TO REDUCE THE SURFACE AREA THEREOF TO BELOW ABOUT 5 M2/G, SAID CALCINATION BEING CARRIED OUT PRIOR TO THE ADDITION OF ANY CATALYTIC METAL COMPONENT CAPABLE OF COMBINING WITH B2O3 AT SAID CALCINATION TEMPERATURE;
Claim 12
Dependent Claim
31 words
IMPREGNATING THE CALCINED SUPPORT WITH A SOLUTION OF A SALT OF AT LEAST ONE CATALYTIC METAL SELECTED FROM GROUP IB, IIB, VB, VIB, VIIB AND VIII OF THE PERIODIC TABLE; AND
Claim 13
Dependent Claim
31 words
IMPREGNATING THE CALCINED SUPPORT WITH A SOLUTION OF A SALT OF AT LEAST ONE CATALYTIC METAL SELECTED FROM GROUP IB, IIB, VB, VIB, VIIB AND VIII OF THE PERIODIC TABLE; AND
Claim 14
Dependent Claim
31 words
impregnating the calcined support with a solution of a salt of at least one catalytic metal selected from Groups IB, IIB, VB, VIB, VIIB and VIII of the Periodic Table; and
Claim 15
Dependent Claim
31 words
impregnating the calcined support with a solution of a salt of at least one catalytic metal selected from Groups IB, IIB, VB, VIB, VIIB and VIII of the Periodic Table; and
Claim 16
Dependent Claim
22 words
A method as defined in claim 1 wherein said calcining in step (2) is carried out at between about 800* and 1200*C.
Claim 17
Dependent Claim
31 words
impregnating the calcined support with a solution of a salt of at least one catalytic metal selected from Groups IB, IIB, VB, VIB, VIIB and VIII of the Periodic Table; and
Claim 18
Dependent Claim
31 words
impregnating the calcined support with a solution of a salt of at least one catalytic metal selected from Groups IB, IIB, VB, VIB, VIIB and VIII of the Periodic Table; and
Claim 19
Dependent Claim
16 words
calcining the salt-impregnated support to convert the impregnated salt or salts to an active catalytic form.
Claim 20
Dependent Claim
16 words
calcining the salt-impregnated support to convert the impregnated salt or salts to an active catalytic form.
Claim 21
Dependent Claim
53 words
A method as defined in claim 1 wherein the surface area of said support prior to said impregnation in step (1) is above about 100 m2lgm, and wherein said calcining in step (2) is continued for a time sufficient to yield a support having a surface area between about 20 and 70 m2/gm.
Claim 22
Dependent Claim
16 words
calcining the salt-impregnated support to convert the impregnated salt or salts to an active catalytic form.
Claim 23
Dependent Claim
16 words
calcining the salt-impregnated support to convert the impregnated salt or salts to an active catalytic form.
Claim 24
Dependent Claim
16 words
CALCINING THE SALT-IMPREGNATED SUPPORT TO CONVERT THE IMPREGNATED SALT OR SALTS TO AN ACTIVE CATALYTIC FORM.
Claim 25
Dependent Claim
16 words
CALCINING THE SALT-IMPREGNATED SUPPORT TO CONVERT THE IMPREGNATED SALT OR SALTS TO AN ACTIVE CATALYTIC FORM.
Claim 26
Dependent Claim
25 words
A method as defined in claim 1 wherein about 1-18 weight-percent of B2O3 equivalent is incorporated into the support during said impregnation in step (1).
Claim 27
Dependent Claim
42 words
A catalyst composition prepared by the method of claim 1, wherein the active metal or metals are selected from the class consisting of zinc, cadmium, copper, silver, chromium, molybdenum, tungsten, manganese, rhenium, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, and platinum.
Claim 28
Independent Claim
19 words
A method for the manufacture of a supported active metal catalyst which resists shrinkage at high temperatures, which comprises:
Claim 29
Independent Claim
19 words
A method for the manufacture of a supported active metal catalyst which resists shrinkage at high temperatures, which comprises:
Claim 30
Dependent Claim
14 words
A method as defined in claim 7 wherein said B2O3 precursor is boric acid.
Claim 31
Dependent Claim
53 words
A method as defined in claim 7 wherein the surface area of said support prior to said impregnation in step (1) is above about 100 m2/gm, and wherein said calcining in step (2) is continued for a time sufficient to yield a support having a surface area between about 20 and 70 m2/gm.
Claim 32
Dependent Claim
25 words
A method as defined in claim 7 wherein about 1-18 weight-percent of B2O3 equivalent is incorporated into the support during said impregnation in step (1).
Claim 33
Dependent Claim
42 words
A catalyst composition prepared by the method of claim 7, wherein the active metal or metals are selected from the class consisting of zinc, cadmium, copper, silver, chromium, molybdenum, tungsten, manganese, rhenium, iron, cobalt, nickel, ruthenium, rhodium, palladium, osmium, iridium, and platinum.
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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) | 1978-05-12 | 1978-11-11 | 1979-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-12 | 1982-11-11 | 1983-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-12 | 1986-11-11 | 1987-05-13 | $7700.00 | Window Closed / Lapsed |