Patent US5081086A successfully refreshed from Google Patents.
US5081086A
Expired / Lapsed
US
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Solid phosphoric acid catalyst
Assignee: Honeywell UOP LLC
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Filing: 1989-12-18
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Granted: 1992-01-14
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Expires: 2009-12-18
Abstract
Abstract A novel solid phosphoric acid catalyst composition is disclosed. The composite comprises solid phosphoric acid and a refractory oxide binder. The composite is characterized in that 25.0 volume percent or less of the total catalyst pore volume consists of pores having a diameter of 10,000 ANGSTROM or greater. An improvement in catalyst activity and stability is observed when such a catalyst is utilized in a hydrocarbon conversion process.
Inventors
- 👤 Fiona P. Wilcher
- 👤 Tai-Hsiang Chao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:28
CPC Classifications
B; B01; B01J; B01J35/00; B01J35/60; B01J27/00; B01J27/14; B01J27/16; C; C07; C07C; C07C2/00; C07C2/54; C07C2/64; C07C2/66; C07C2/70; B01J35/63; B01J35/633; B01J35/66; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2527/173
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
71 words
A solid phosphoric acid composite comprising one or more acids of pentacovalent phosphorus in an amount from about 60 to about 88 weight percent of the composite, adsorbed on a binder which is a refractory inorganic oxide or a siliceous material, said composite having a pore volume no more than 0.28 cc/g with 25 percent or less of the pore volume arising from pores with a diameter greater than 10,000 Å.
Claim 2
Dependent Claim
71 words
A solid phosphoric acid composite comprising one or more acids of pentacovalent phosphorus in an amount from about 60 to about 88 weight percent of the composite, adsorbed on a binder which is a refractory inorganic oxide or a siliceous material, said composite having a pore volume no more than 0.28 cc/g with 25 percent or less of the pore volume arising from pores with a diameter greater than 10,000 Å.
Claim 3
Dependent Claim
30 words
The solid phosphoric acid composite of claim 1 where the refractory inorganic oxide is selected from the group consisting of alumina, magnesium oxide, calcium oxide, titanium oxide, and phosphorus oxides.
Claim 4
Dependent Claim
31 words
The solid phosphoric acid composite of claim 1 where the siliceous material is selected from the group consisting of silicas, kieselguhr, diatomaceous earth, infusorial earth, kaolin, fullers earth, or combinations thereof.
Claim 5
Dependent Claim
24 words
The solid phosphoric acid composite of claim 3 where the siliceous material is diatomaceous earth, kieselguhr, an artificially prepared porous silica, or combinations thereof.
Claim 6
Dependent Claim
22 words
The solid phosphoric acid composite of claim 1 where the pore volume of the composite is no more than about 0.23 cc/g.
Claim 7
Dependent Claim
27 words
The solid phosphoric acid composite of claim 1 where 17.5 percent or less of the pore volume arises from pores with a diameter greater than 10,000 Å.
Claim 8
Dependent Claim
41 words
The solid phosphoric acid composite of claim 1 where the pore volume of the composite is no more than about 0.23 cc/g. and 17.5 percent or less of the pore volume arises from pores with a diameter greater than 10,000 Å.
Claim 9
Dependent Claim
14 words
The solid phosphoric acid composite of claim 1 in the form of an extrudate.
References Cited (Backward Citations)
US2116151A
Cited
US2275182A
Cited
US2586852A
Cited
US3050470A
Cited
US2960477A
Cited
US3044964A
Cited
US3551510A
Cited
US3520945A
Cited
US3527823A
Cited
US3661801A
Cited
US4617070A
Cited
US4912297A
Cited
US4946815A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-13 | 1995-07-15 | 1996-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-13 | 1999-07-15 | 2000-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-13 | 2003-07-15 | 2004-01-14 | $7700.00 | Window Closed / Lapsed |