Patent US4405503A successfully refreshed from Google Patents.
US4405503A
Expired / Lapsed
US
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Production of zeolite agglomerates
Assignee: BP PLC
•
Filing: 1981-11-18
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Granted: 1983-09-20
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Expires: 2001-11-18
Abstract
Abstract Strengthened zeolite molecular sieve agglomerates are prepared by treating the agglomerates with an aqueous solution of a water soluble silicon compound and subsequently with an aqueous solution of a mineral acid of sufficient strength to decationize the molecular sieve and/or increase its SiO 2 :Al 2 O 3 ratio. The strengthened agglomerates are suitable for use as catalyst supports.
Inventors
- 👤 John L. Barclay
- 👤 John D. Hargrove
- 👤 Richard J. Prince
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:03
CPC Classifications
B; B01; B01J; B01J20/00; B01J20/02; B01J20/10; B01J20/16; B01J20/18; B01J20/186; B01J29/00; B01J29/04; B01J29/06; B01J29/18; B01J2229/00; B01J2229/10; B01J2229/26; B01J2229/30; B01J2229/42
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
69 words
A method for the preparation of a strengthened agglomerate based on a zeolitic molecular sieve which method comprises treating the agglomerate with an aqueous solution of a water soluble silicon compound characterised by the fact that the zeolitic molecular sieve is subsequently treated with an aqueous solution of a mineral acid of sufficient strength to decationize the molecular sieve and/or increase its SiO 2 :Al 2 O 3 ratio.
Claim 2
Independent Claim
69 words
A method for the preparation of a strengthened agglomerate based on a zeolitic molecular sieve which method comprises treating the agglomerate with an aqueous solution of a water soluble silicon compound characterised by the fact that the zeolitic molecular sieve is subsequently treated with an aqueous solution of a mineral acid of sufficient strength to decationize the molecular sieve and/or increase its SiO 2 :Al 2 O 3 ratio.
Claim 3
Dependent Claim
17 words
A method according to claim 1 wherein the water soluble silicon compound is an alkali metal silicate.
Claim 4
Independent Claim
18 words
A method according to either of the preceding claims wherein the mineral acid is sulphuric or hydrochloric acid.
Claim 5
Dependent Claim
13 words
A method according to claim 1 wherein the zeolitic molecular sieve is mordenite.
Claim 6
Dependent Claim
14 words
A method according to claim 4 wherein the mordenite is associated with a binder.
Claim 7
Dependent Claim
29 words
A method according to claim 1 wherein the treatment with the mineral acid directly follows the treatment with the soluble silicon compound, apart from optional washing and drying stages.
Claim 8
Dependent Claim
28 words
A method according to claim 1 wherein after the mineral acid treating step, the resulting agglomerate is impregnated with a hydrogenating component which is a Group VIII metal.
Claim 9
Dependent Claim
23 words
A method according to claim 1 wherein the acid is of sufficient strength to increase the SiO 2 :Al 2 O 3 ratio.
References Cited (Backward Citations)
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US3207701A
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US3296151A
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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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |